Applied Theory

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• 2018 Vol. 65(11): 1205-1209

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• Abstract:

• WU Jian,ZHANG Chuanbing,WANG Youshan,JIANG Honggang and LU Ming
• Research on Tensile/Compression Mechanical Behavior of Aviation EPDM Rubber

• 2018 Vol. 65(11): 1210-1213

  [Abstract](89)

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• Abstract:The excellent mechanical properties of EPDM rubber are important to ensure the safety of its service equipment. However, its mechanical properties are significantly affected by temperature. In this paper, taking aviation EPDM rubber as an example, the influence of temperature ranges from 20℃ to 140℃ on the mechanical behavior of EPDM rubber is studied based on uniaxial tensile/compression experiment and finite element method (FEM). Results indicate that the Mullins effect, tearing force and tearing elongation of EPDM rubber decrease with the increasement of temperature.

• LI Tian Ya and YU Kai-ben
• Application of different grades of carbon black in adhesion between neoprene and brass

• 2018 Vol. 65(11): 1214-1217

  [Abstract](103)

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• Abstract:Abstract: This paper mainly studies the influence of different grades of carbon black on the physical and mechanical properties of chloroprene rubber vulcanizate, and the application of different grades of carbon black in the adhesion between neoprene and brass. It is found that the vulcanizate with good physical and mechanical properties can be obtained when carbon black N330 or carbon black N550 are used. Both physical bonding and chemical bonding, using carbon black N550 formula of the initial pull force and resistance to aging pull force and pull force are the biggest after water corrosion.

• YAO Hainan and DING Xuejia
• Effect of HEMA and NVP on Hydrophilicity of Silicone Rubber

• 2018 Vol. 65(11): 1218-1223

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• Abstract:Using methylvinyl thermosetting addition type silicone rubber，hydroxyethyl methacrylate（HEMA） or N-vinyl pyrrolidone（NVP） as raw material，benzophenones（BP） and benzoin dimethyl ether（DMPA） as photoinitiators，hydrophilic poly（hydroxyethyl methacrylate）（PHEMA） or poly（vinylpyrrolidone）（PVP） were introduced into solid silicone rubber（SiR） by UV polymerization，and semi-interpenetrating polymer network（S-IPN） could be obtained.The test results showed that，the stretching vibration characteristic peaks of O—H bond and C=O bond in PHEMA and PVP appeared in the infrared spectrum of SiR/HEMA and SiR/NVP composites.Obvious protrusions cross-section could be seen in the electron microscope photos of composites.The mass loss rate of SiR was 69.11%，and that of SiR/HEMA and SiR /NVP composites were 80.72% and 79.27%，respectively.The decomposition rates of two kinds of composites at high temperature were higher than that of SiR.The initial static water contact angle of SiR was 107.5°，and that of SiR/HEMA and SiR/NVP composites were 52.2° and 20.8°，respectively.In conclusion，it was confirmed that S-IPNs were formed in SiR/HEMA and SiR/NVP composites，the hydrophilicity of two kinds of composites were improved greatly，and hydrophilicity of SiR/NVP composite were obviously superior to those of SiR/HEMA composite.

• WANG De-yin,LI Xiao-yin,HUANGFU Xi-le,RONG De-gong and WANG Gang
• Adhesion of NR Faceblank and CPU Flexible Lens for Respirators

• 2018 Vol. 65(11): 1224-1232

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• Abstract:In this paper, the connection between natural rubber (NR) faceblank and casting polyurethane elastomer (CPU) flexible lens for respirators employing adhesive technology instead of traditional clamp connection. Surface compositions and morphologies of the pristine and chemical treated NR faceblank are analyzed by X-ray photoelectron spectroscopy (XPS), attenuated total reflection fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), and the bonding properties for the joints of NR faceblank/CPU flexible lens are investigated. Results show that surface treatment of NR faceblank by trichloroisocyanuric acid/ethyl acetate (TCI/EAC) not only introduces a large amount of Cl and O elements through chlorination and epoxidation but also changes the surface morphology greatly. Acceptable bonding properties can be achieved by using polyurethane adhesive, and T-peel strength of lap joints and pull out force of scarf joints are ca.3.7KN/m and 560N. Surface chemical treatment is an effective way to improve the adhesion properties.

Material · Compounding

• CHEN Li,PANG Xiujiang,ZHAO Jian and YU Guangshui
• Effects of Graphene on Curing and Physical Properties of NR

• 2018 Vol. 65(11): 1233-1236

  [Abstract](106)

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• Abstract:In order to balance the comprehensive practical performance of natural rubber(NR),NR vulcanizates were prepared by partially replacing the traditional filler carbon black(CB) with some graphene(Gr) using melt blending method. The influence of graphene addition on properties such as curing characteristics, physical mechanical properties and etc. were investigated by using various measurements. Experimental results showed that graphene degraded NR rubber’s processing safety, curing speed, crosslinking density and tear strength, but lifted its tensile strength, stress at fixed elongation, hardness and abrasion resistance. Graphene also entitled NR vulcanizates with better heat-aging resistance, tensile fatigue resistance and lower compression temperature rise as well as static compression permanent deformation rate. DMA results implied 3phr graphene resulted in NR rubber with lighter weight and balanced driving performances such as better wet-skid resistance and lower rolling resistance, which would be beneficial for safe and fuel-efficient tire products.

• Chen Xianhong,Yu Peng,Fu Zhizhong and Li Chunqing
• Preparation and Properties of High Crosslinking density silicone rubber

• 2018 Vol. 65(11): 1237-1242

  [Abstract](79)

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• Abstract:high crosslinking density and hard silicone rubber was obtained by hydrosilylation of tetramethyltetravinylcyclotetrasiloxane and tetramethyltetrahydrocyclotetrasiloxane under the action of platinum catalyst. The process of "liquid level suspension" and "multi-step heating" were adopted in the preparation process. The curing process, surface properties, hardness and thermal stability were studied by DSC,Fourier transform infrared spectrometer, atomic force microscope, Shao hardness tester and thermogravimetric analyzer, respectively. The crosslinking density was calculated by equilibrium swelling method. The experimental results show that: multi-step heating can effectively control the crosslinking reaction; and the silicone rubber has a very low roughness, and RMS roughness Rq is 1.74 nm, and average roughness of Ra is 1.39 nm; hardness of Shao D is 78.3; crosslinking density is 2.87′10-3 mol/cm-3; when the mass loss of silicone rubber is 5%, the corresponding temperature is 602.1 o C, and the final residual amount is 83.57%.

• Wang Chuansheng,Zhang Luqi,Bian Huiguang and Li Haitao
• Study on properties of carbon Fiber reinforced Natural Rubber Composites

• 2018 Vol. 65(11): 1243-1247

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• Abstract:In this paper, the effects of carbon fiber content on the mechanical properties, electrical conductivity, thermal conductivity, processing properties and dynamic mechanical properties of rubber / carbon fiber composites were studied. The results show that the mechanical properties of NR / CF composites are the best when 3phr carbon fibers are added. When 15phr was added, the volume resistivity of rubber sample decreased by 3 orders of magnitude compared with that without carbon fiber. The thermal conductivity was increased by 21.8 than that of the sample without carbon fiber. With the increase of carbon fiber content, the wet skid resistance and rolling resistance of the sample increased.

• shahui,caoyouming and liwenkang
• Preparation and application of polysiloxane containing cerium for high temp- erature resistance silicone rubber

• 2018 Vol. 65(11): 1248-1252

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• Abstract:In this paper, polysiloxane containing cerium(PSC) with similar structure to silicone rubber was synthesized by siloxane, potassium hydroxide and anhydrous cerium chloride. The effects of PSC, siloxane and heat-resistant additives on the high temperature performance of silicone rubber were investigated. The structure of PSC was characterized by FTIR. The mechanical properties, thermogravimetric analysis and scanning electron microscopy were utilized to characterize the properties of PSC.

• Sun Ju-tao,Wang Lili,Liu Xiaoling and Shi Xiaokai
• Studies on the Preparation of Tea Polyphenol Derivatives and Their Application in Rubber Materials

• 2018 Vol. 65(11): 1253-1256

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• Abstract:Based on the abundant phenolic hydroxyl groups of tea polyphenol (TP), two kinds of multifunctional rubber additives were prepared according to the Mannich reaction mechanism and complexing mechanism. These two additives have the multifunction of promoting vulcanization, improving filler dispersion and improving rubber-filler interaction. When used in rubber materials, they can improve the tensile strength, wear resistance and decrease the temperature rise of vulcanizates.

• CHEN Xiao-li,SU Zhong-kui and MA Song-kai
• Effect of structural modifiers on polymerization of liquid isoprene rubber

• 2018 Vol. 65(11): 1257-1260

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• Abstract:The liquid isoprene rubber (LIR) was synthesized by lithium anion polymerization. Five different structural regulators were added to the polymerization process to study their effect on LIR structure. The results show that the non-polar regulator carbon disulfide (CS₂) has little effect on the content of LIR cis-1,4, and the polar modifier can reduce the content of cis-1,4. The effect of diethylene glycol dimethyl ether (2G) and tetramethylethylenediamine (TMEDA) on the content of cis-1,4 was higher; The effect of ether (Et₂O) on the content of cis-1,4 was smaller; Tetrahydrofuran (THF) as a structural regulator of the best results.

• Bianhuiguang,Liujie,Songfengpeng,Lihaitao,Xiaopeiguang and Wangchuansheng
• Effect of concentration of silica slurry on properties of natural rubber / silica wet mixing compound

• 2018 Vol. 65(11): 1261-1265

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• Abstract:The silica was ground in a liquid state using a ball mill to obtain four different concentrations of silica slurry. Using wet mixing process,four different concentrations of silica slurry and natural latex mixed, preparation of natural rubber/silica composite.On the performance of this type of composite determination results show that: with four different concentrations of the preparation of white carbon black composite material properties showed significant differences,when the concentration of silica slurry is 25% and composite showed the best comprehensive performance.

Product · Design

• shilikang
• Performance Analysis of Rubber Speed Bump with Cosine Curve

• 2018 Vol. 65(11): 1266-1269

  [Abstract](75)

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• Abstract:Based on the speed control principle of speed bump and the problem existed in traditional speed bump，the vertical velocity and acceleration characteristics of the vehicle crossing the circular arc-shaped speed bump which was widely used at present stage were compared，a new speed bump with two cosine curves on both sides of the cross section was proposed.From the curve equation of the deceleration section as the breakthrough point，accompanied with the method of calculation and modeling combination，the vertical velocity and acceleration characteristics of wheel center in the whole collision process of vehicle wheel and rubber speed bump was analysized.Simulated via the software of MATLAB，a conclusion was obtained that the rubber deceleration bump with cosine curve did not speed mutations，compared to vertical acceleration change of circular arc-shaped rubber speed bump，the new rubber speed bump had better disciplinary action for those traveling speeding vehicles，while it could effectively control speed and improve the driving and ride comfort，which had a good application prospects.

• liyong and zhangwenqing
• Application of Deflector on Cyclone-bag Filter

• 2018 Vol. 65(11): 1270-1274

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• Abstract:The numerical simulation of cyclone-bag filter was carried out by Fluent software，the problem of low service life of filter bag was found due to uneven distribution of air flow.Three kinds of guide plates were introduced and analyzed，and the results showed that the airflow distribution of the perforated plate Ⅲ was the best，the maximum amplitude of non-uniform flow was decreased by 49.4%，and the non-uniform amplitude of synthesized flow was decreased by 56%.

• yuzhongjian
• Fault analysis and improvement measures of monorail stop rubber cracking

• 2018 Vol. 65(11): 1275-1277

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Technology · Equipment

• YANG Jun,CHEN Ping,FU Jinlun and WU Zhifeng
• Finite Element Simulation and Experimental Research on Curing Process of Laminated Rubber Isolation Bearing

• 2018 Vol. 65(11): 1278-1283

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• Abstract:Based on the equation of heat conduction and Rafei’s curing kinetics model, a finite element simulation model of laminated rubber isolation bearings’ curing process is established. The result of the thermocouple temperature test verifies the validity of the established finite element model. So it can be used in the formulation and optimization of the curing process. Four curing schemes are simulated by using the finite element model. The results show that the preheating of the rubber isolation bearing can improve the curing efficiency more than the auxiliary heating.

• Lin-Guangyi and Zhao-Huiji
• Design on New Type of Micro Rib Rotor for Mixer and Its Mixing Flow Field Simulation Analysis

• 2018 Vol. 65(11): 1284-1289

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• Abstract:The three dimensional physical model of a novel micro fin rotor for mixer was designed，and the finite element simulation and analysis on the mixing flow field of the micro fin rotor was carried out by using ProE/Polyflow software.The results showed that，the micro rib structure increased the pressure gradient，velocity gradient and viscosity gradient，and hybrid index in 0.5～0.6 of the compound.The shear-ing action on the compound was enhanced，and a certain tensile action arised，which was helpful to the mixing and dispersing of the compound.

• zhanglei and fuzhihong
• Numerical Simulation of Hot Embossing of Rubber-assisted

• 2018 Vol. 65(11): 1290-1293

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• Abstract:The rubber instead of traditional mold was used to form the shell-shaped product. The material parameters of each hardness rubber were determined by uniaxial tensile test, and the rubber constitutive model was determined as the Mooney-Rivlin model. The Polymethyl methacrylate（PMMA）material model was defined as a generalized Maxwell model. The finite element simulation software ANSYS was used to simulate the molding process. The effects of temperature, pressure and rubber hardness were studied on the PMMA molding process. The simulation results show that the microchannel forming depth increases with the increase of temperature and pressure. The smaller the rubber hardness is ，the more obvious the molding effect is., but the thickness uniformity of the molded product will be affected.

• GUO FANG FEI
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• 2018 Vol. 65(11): 1294-1297

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Testing · Analysis

• Deng Ai-ni,Zhou Cong,Ye Hai-hui,Gao Li-hua,Lai Hong-nan and Zhao Min
• Study on Rapid Qualitative Analysis of Doping Latex

• 2018 Vol. 65(11): 1298-1301

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• Abstract:The rapid qualitative analysis methods of doping latex were studied.The contrast test of fresh latex and the doped latex of starch，urea，dusts and lime powder with mass fraction of 0.05 were carried out.The results showed that，when the latex without solidification and pressing was directly dried by using the disc automatic sampling hot box type latex sample dryer，the color and texture of the doping latex film were quite different from that of the fresh latex film.The latex were conglomerated under the effect of acetic acid and compressed into sheet rubber with gel sample sheeter.Under the conditions of same amount of acid，sheeter pressure，sheeting thickness and sheet rubber size were consistent，the physical properties such as tear point and tensile length of sheet rubber of doping latex were obviously lower than that of sheet rubber of fresh latex.The drying test by disc automatic sampling hot box type latex sample dryer or the physical property test on sheet rubber of latex could be used as field rapid qualitative analysis methods for the quality of doping latex，and applied in the condition of simple operation，shorter time，and simple and portable equipment.

• ZENG XIANKUI,liyingru,HUANG NIANCHANG,ZHANG JIE and BAO LIPING
• Viscoelastic Performance Prediction of EPDM Based on Elman Neural Network

• 2018 Vol. 65(11): 1302-1305

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• Abstract:In this paper, the relationship between the EPDM formula and the viscoelastic properties of EPDM was studied experimentally. The Elman neural network prediction model was established to predict the dynamic viscoelastic properties (Storage modulus, loss modulus, loss factor) of the compound at 85 ℃ and 15% strain. 16 sets of experimental data were obtained by orthogonal experiment design, and Elman neural network was trained by 1-14 data. The remaining 15-16 data were used to detect the prediction ability of Elman neural network. Four sets of experimental data were designed to detect Elman neural network prediction ability. The results show that the elastic error of the Elman neural network is less than 4%, and the model can accurately predict the viscoelastic properties of the EPDM compound.

Gomprehensive and Special Review

• zhangyingwen
• Finite Element Analysis of Influence Factors on Rolling Tire Vibration Characteristics

• 2018 Vol. 65(11): 1306-1312

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• Abstract:Taking 215/75R17.5 truck and bus radial tire as the object，using Abaqus/Explicit to simulate the rolling process of tire on the drum and analyze its vibration characteristics.In order to verify the accuracy of the finite element analysis method，Doppler laser vibrometer was used to measure the vibration response of measuring points on tire sidewall in the time domain，and then Matlab corrugated medium low pass filter Firpm function was used to filter the measured time domain signal，vibration frequency response signals between 20～500 Hz were retained and Fourier transformed，compared with the simulation values of the frequency domain，they had good consistency，which proved the accuracy of the finite element analysis method for rolling tire.Based on the finite element simulation，the effects of velocity，inflation pressure and load on the tread and sidewall vibration characteristics were analyzed.The results showed that the tread vibration velocity distribution was symmetrical about tire vertex，the amplitude of vibration velocity close to the ground was maximum，and the vibration velocity of ground back end was larger than that of ground front end.With the increase of velocity and inflation pressure，the vibration velocity of tread and sidewall increased，and the load had little effect on the vibration velocity of tread and sidewall.

• zhangshengqiang,Rui Xiaoli,Xu Jiandong and Zhang Ying
• A Review on Preparation and Magnetostrictive Response Models for Magneto Sensitive Elastomers

• 2018 Vol. 65(11): 1313-1317

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国内外动态

• 赵敏
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• 2018 Vol. 65(11): 996-996

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• zhujia
• Redesigned 2019 Subaru Forester Will Roll on Falken Tires

• 2018 Vol. 65(11): 1205-1205

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• 赵敏
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• 2018 Vol. 65(11): 1210-1210

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• zhangzhao
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• 2018 Vol. 65(11): 1214-1214

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• WU Xiulan
• Kumho Adds to Its All-Season UHP Lineup

• 2018 Vol. 65(11): 1218-1218

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• 吴淑华
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• 2018 Vol. 65(11): 1218-1218

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• 赵敏
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• 2018 Vol. 65(11): 1224-1224

  [Abstract](65)

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• WU Xiulan
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• 2018 Vol. 65(11): 1233-1233

  [Abstract](80)

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• 赵敏
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• 2018 Vol. 65(11): 1237-1237

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• 赵敏
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• 2018 Vol. 65(11): 1237-1237

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• 赵敏
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• 2018 Vol. 65(11): 1253-1253

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• 吴淑华
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• 2018 Vol. 65(11): 1253-1253

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• 吴淑华
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• 2018 Vol. 65(11): 1260-1260

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• 吴淑华
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• 2018 Vol. 65(11): 1261-1261

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• 赵敏
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• 2018 Vol. 65(11): 1261-1261

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• 赵敏
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• 2018 Vol. 65(11): 1266-1266

  [Abstract](51)

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• 赵敏
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• 2018 Vol. 65(11): 1270-1270

  [Abstract](77)

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• Abstract:

• 吴淑华
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• 2018 Vol. 65(11): 1270-1270

  [Abstract](58)

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• 吴淑华
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• 2018 Vol. 65(11): 1278-1278

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• 赵敏
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• 2018 Vol. 65(11): 1298-1298

  [Abstract](62)

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• 赵敏
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• 2018 Vol. 65(11): 1302-1302

  [Abstract](63)

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• zhujia
• Hercules’ New Avalanche RT Winter Tire Is Studdable

• 2018 Vol. 65(11): 1306-1306

  [Abstract](70)

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• Abstract:Hercules’ New Avalanche RT Winter Tire Is Studdable

• 赵敏
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• 2018 Vol. 65(11): 1306-1306

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• 赵敏
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• 2018 Vol. 65(11): 1313-1313

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