Applied Theory

• CHU Lijun, WANG Jian and LIANG Yurong
• Study of NRLCNs on Structure and Strain-induced Crystallization Behavior

• 2019 Vol. 66(8): 0569-0572

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• Abstract:Natural latex/organic clay（NRLCNs）nanocomposites were prepared by emulsion polymerization. The effects of NRLCNs"" structure，thickness of samples and clay content on the strain-induced crystallization behavior of composites were investigated.The results showed that，NRLCNs were intercalated structure.When the thickness of samples was the same，the physical properties of NRLCNs with organic clay content of 3 phr were the best.When the amount of organic clay was the same，the physical properties of NRLCNs with smaller thickness of samples were better.With the increase of tensile strength，the modulus of NRLCNs increased gradually.When the critical strain value was reached，the modulus increased rapidly，resulting in the strain-induced crystallization behavior The NRLCNs with smaller sample thickness are prone to the strain-induced crystallization behavior.

• Li li,Wan Chengcheng,Yang Linbin and Xie Tian
• Effect of Trace Element Content on Adhesion of CR-Brass Bonding Interface

• 2019 Vol. 66(8): 0573-0576

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• Abstract:The relationship between trace element content in the bonding interface of chloroprene rubber （CR）（vulcanizate） filled with different carbon black varieties-brass and adhesion was analyzed.The changes of trace element content in the CR-brass bonding interface before aging，after thermal aging and after water immersion were investigated，and the effects of trace element content in the CR-brass bonding interface by chemical bonding and physical bonding on adhesion were studied.The results showed that，after thermal aging，the S element mass fraction，Cu element mass fraction and S element/Cu element mass fraction ratio of CR-brass bonding interface by chemical bonding increased，and the adhesion increased.After water immersion，the S element mass fraction of CR-brass bonding interface by chemical bonding was decreased，the Cu element mass fraction increased，and the adhesion decreased.After thermal aging and water immersion，the trace elements mass fraction of CR-brass bonding interface by physical bonding had little change，and the trace elements mass fraction could not be used to characterize the adhesion strength.

• tianliang,fanqingming,caoyan and ZHAO Han
• Simulation of Cardiac Mathematical Model Based on Hyperelastic Materials

• 2019 Vol. 66(8): 0577-0580

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• Abstract:In view of the mechanical characteristics of large deformation，nonlinearity，anisotropy and high strain rate during cardiac motion，the hyperelastic material mathematical model considering strain rate effect was used for finite element analysis，and the relevant parameters of three constitutive models，i.e.isotropic，transverse isotropic and anisotropic，were obtained.By comparing the number of Newton iterations and CPU time needed to solve the three models，the anisotropic constitutive model was selected as the constitutive model of cardiac kinematics simulation，which could provide reference and data support for subsequent cardiac mechanics modeling，physiological analysis and mathematical model iteration calculation.

Material · Compounding

• Liu Huaqiao,Pan Yiren,Wang Xiaoming,Bian Huiguang and Li Hongwei
• Effects of Type and Addition Level of Carbon Black on Flexing Resistance of Sidewall Compound

• 2019 Vol. 66(8): 0581-0586

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• Abstract:The effects of type and addition level of carbon black on flexing resistance of sidewall compound were studied. The results showed that when the hardness of compound（Shore A hardness was 75 degree） was fixed，with the increase of particle size of carbon black，Payne effect and thermal stability of the compound decreased，the tensile stress at a given elongation increased，the tensile strength，compression fatigue temperature rising and flexing resistance decreased.When the type of the carbon black N550 was fixed，with the increase of addition level of carbon black，the Payne effect，hardness and tensile modulus of the compound increased，the elongation at break，compression fatigue temperature rising and flexing resistance decreasesd.The compression fatigue temperature rising and flexing resistance of the compound would reduced by adding environment-friendly aromatic oil when the type and addition level of carbon black were the same.

• LI Pengju,WU Xiaohui,LU Yonglai and ZHANG Liqun
• Application of Interface Coupling Agent KH550 in Graphene Oxide/Silica Nano-hybrid Fillers

• 2019 Vol. 66(8): 0587-0591

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• Abstract:The silica was modified by γ-aminopropyltriethoxysilane（coupling agent KH550），then mechanically mixed with the graphene oxide（GO） suspension，and coupling agent KH550 modified GO/Silica nano-hybrid filler（GO@SiO2） was prepared by spray-drying mixture．The effect of the coupling agent KH550 amount on the properties of the solution-polymerized styrene-butadiene rubber（SSBR）/butadiene rubber（BR）/GO@SiO2 composite was investigated．The results showed that，when the mass fraction of coupling agent KH550 was 7% and 10% of silica，the thermal stability of GO@SiO2 was better.The coupling agent KH550 could significantly improve the crosslink density，filler dispersibility，wear resistance and reduce heat build-up of composites．When the mass fraction of coupling agent KH550 was 5% of silica，the crosslink density was the highest and the comprehensive physical properties of the composite were the best．When the mass fraction of coupling agent KH550 was 10% of silica，the wear resistance of the composite was the best and the heat build-up was the lowest.

• yanglin,CHEN Yongqian,WANG Youzhi,LUO Xiaofeng,HUANG Qiang and WU Youping
• Application of Silica Dispersing Agents in MVQ/SBR Blend

• 2019 Vol. 66(8): 0592-0595

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• Abstract:The effects of silica dispersing agent HST and H60EF on the properties of methyl vinyl silicone rubber（MVQ）/styrene butadiene rubber（SBR） blend were studied.The results showed that，by adding silica dispersing agent HST and H60EF in the MVQ/SBR blend，the curing rate of compound increased，the dispersion，processability and mixing efficiency were improved.Silica dispersing agent HST had no obvious effect on the dynamic mechanical properties of MVQ/SBR blend，and could improve the tear strength and aging resistance.It could be used as a functional agent for MVQ/SBR blend.

• Wang chuansheng,liguangchao and bianhuiguang
• Properties of 3D Printing Glass Fiber/Thermoplastic Polyurethane Blended Materials

• 2019 Vol. 66(8): 0596-0601

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• Abstract:The properties of 3D printing glass fiber/thermoplastic polyurethane blended material were investigated based on a powder feed 3D printer.The results showed that，with the increase of glass fiber mass fraction，the tensile strength of blended material increased first and then decreased.When the glass fiber mass fraction was 0.08，the tensile strength of blended material was the largest，which was 51.2 MPa and raised 41% than that of thermoplastic polyurethane.The bending strength and compressive strength were firstly decreased，then increased and then decreased.When the glass fiber mass fraction was 0.15，the compressive strength of blended material was the largest，which was 108.35 MPa.The impact strength increased first and then decreased.When the glass fiber mass fraction was 0.08，the impact strength of blended material was the highest，which was 15.52 kJ·m-2 and raised 39% than that of thermoplastic polyurethane.

• guoping,yandingxin and zoubin
• Study on Property of Ammonia-free Natural Latex

• 2019 Vol. 66(8): 0602-0605

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• Abstract:The storage performance，processability，tensile properties of the film and self-curing mechanism of the ammonia-free natural latex using the speeding accelerator PX/sulfur/zinc oxide curing system were studied.The results showed that the isothiazolinone derivative preservative used for ammonia-free natural latex had a synergistic effect on the accelerator PX/sulfur/zinc oxide curing system.The isothiazolinone derivative would lead the ammonia-free complex latex self-curing at room temperature.Appropriate adjustment of the amount of accelerator PX/sulfur/zinc oxide could obtain the ammonia-free complex latex with better storage performance，film formation performance and film tensile property.

Product · Design

• Zhu Xinyu,Li Changda,Liang Chen and Wang Guolin
• Research on Tire Inflation Pressure Loss Simulation

• 2019 Vol. 66(8): 0606-0610

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• Abstract:Considering the gas permeability difference and the transient gas diffusion process of tire structural compounds，a more accurate finite element model was established to simulate the tire inflation pressure loss process，and predict the tire inflation pressure loss rate（IPLR）.The results showed that the difference of simulation value with test value on the tire IPLR was within 10%，which illustrated the finite element model could accurately describe the tire inflation pressure loss process.This development would help improve the tire pressure retention performance and support the tire aging research.

• ZHANG Suwen,HOU Xiuju,MENG Jianwen and LI Hongmei
• Surface Modification of Medical Silicone Rubber Catheter and Its Hydrophilicity and Antibacterial

• 2019 Vol. 66(8): 0611-0614

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• Abstract:The medical silicone rubber catheter with hydrophilicity and antibacterial was prepared by surface modification of silicone rubber catheter，and the properties were characterized.The results showed that，compared with the unmodified catheter，the friction coefficient of modified catheter reduced 90% or above，the hydrophilicity was improved significantly.The modified catheter after soaking in water for 7 days still had good lubricity，and the adhesion between coating and catheter surface was better.The modified catheter had good and lasting antibacterial on staphylococcus aureus，which could meet the needs in clinical treatment and had a great application future.

• LI Rong,WANG Fan,ZHOU Jun,DING Li-ping,LIU Jun and LIN Chunmei
• Application of Uniform Design in Optimization of Elevator Guide Wheel Compound Curing System

• 2019 Vol. 66(8): 0615-0618

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• Abstract:The effects of sulfur and promoter M amount in curing system on the properties of compound and finished product for elevator（staircase） guide wheel were investigated by uniform design experiment， and the optimum amount of sulfur and promoter M was determined.The results showed that，compared with the amount of sulfur，the amount of accelerator M had more significant effect on the properties of compound.The amount of accelerator M had significant effect on t10 and Fmax of compound，the hardness，tensile strength，elongation at break and permanent deformation at break of vulcanizate，and the hardness and low frequency noise of finished guide wheel.The amount of sulfur had significant effect on the hardness，tensile strength and elongation at break of vulcanizate，and the hardness of finished guide wheel.The optimum amount of accelerator M was 1～1.5 phr and sulfur was 2～3 phr.

Technology · Equipment

• xu sheng kai,gao jian wen,cheng peng fei,zhou ming ming,shao ming chen and sun xue hong
• Effect of Mixing Process on Micronization of ZnO Particles in NR Compound

• 2019 Vol. 66(8): 0619-0623

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• Abstract:The particles shapes of two kinds of conventional ZnO sample were analyzed in the test，the effect of optimized mixing process on the micronization of two ZnO particles in natural rubber（NR） compound was investigated.The results showed that ordinary ZnO particles aggregated to form aggregates，the aggregates size of 2# ZnO was obviously larger than that of 1# ZnO.ZnO aggregates could be micronizated by addation of ZnO prior to other minor materials，but the effect was not obvious.The particles sizes of two kinds of ZnO could be significantly decreased by one stage masterbatch，which resulted in the properties improvement of the vulcanizates .

Testing · Analysis

• ZHANG Yu,ZHU Wen-ming,WANG Yu-guo,LI Jing-xuan and YANG Tai-long
• Life Prediction of Sealant Strip of Urban Rail Vehicles Door Based on Elongation at Break

• 2019 Vol. 66(8): 0324-0626

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• Abstract:The elongation at break was selected for the performance index of life prediction of the sealant strip of urban rail vehicles door（SSURVD），and the 50% retention rate of elongation at break was used as an aging threshold，the service life of the SSURVD was predicted by the measurement of two points fitting，linear fitting and non-linear fitting by the test data.The results showed that the over maintenance was happened according to the service life of the SSURVD predicted by linear fitting measurement.Both reliability and economy were taken basically into account according to the service life of the SSURVD predicted by two points fitting and non-linear fitting.

• ZHOU Jiangong, WANG Yanzhen, SONG Chunmin, DUAN Hongling and ZHU Yuqing
• Property of Special Liquid Paraffin for Determination of High Temperature Stability of Insoluble Sulfur

• 2019 Vol. 66(8): 0627-0629

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Gomprehensive and Special Review

• Xu Li and CHU Min
• Development Status of Electric Vehicle Tires Abroad

• 2019 Vol. 66(8): 0630-0637

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国内外动态

• WU Xiulan
• 普利司通Turanza QuietTrack轮胎提供全天候性能

• 2019 Vol. 66(8): 0568-

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• 吴淑华
• 新型生物基橡胶技术通过中期检查

• 2019 Vol. 66(8): 0568-

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• xuyashuang
• 弗雷德为超高性能轿车领域提供全天候轮胎

• 2019 Vol. 66(8): 0576-

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• zhangzhao
• 优科豪马Geolandar X-AT轮胎适合崎岖地形

• 2019 Vol. 66(8): 0580-

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• 吴淑华
• 玲珑轮胎成为红旗L5优享车主

• 2019 Vol. 66(8): 0586-

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• WU Xiulan
• 普利司通提高R284 Ecopia轮胎的燃油效率

• 2019 Vol. 66(8): 0586-

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• 赵敏
• 一种橡胶密封圈硫化装置

• 2019 Vol. 66(8): 0595-

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• 吴淑华
• 世界天然橡胶产量下降

• 2019 Vol. 66(8): 0601-

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• WU Xiulan
• Nexen Roadian AT Pro RA8轮胎通过雪花标志认证

• 2019 Vol. 66(8): 0601-

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• 利
• 米其林;免充气轮胎;原配轮胎

• 2019 Vol. 66(8): 0605-

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• heyan
• 固特异R14农业轮胎是Kubota小型拖拉机的解决方案

• 2019 Vol. 66(8): 0610-

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• 赵敏
• 测试橡胶材料抗开裂性能的装置

• 2019 Vol. 66(8): 0614-

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• 赵敏
• 一种用于再生橡胶脱硫装置的供料系统

• 2019 Vol. 66(8): 0618-

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• 吴淑华
• 印尼生胶业绩有望回升

• 2019 Vol. 66(8): 0623-

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• zhangzhao
• 东洋推出660 mm（26英寸）的Open Country M/T轮胎

• 2019 Vol. 66(8): 0629-

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• huhao
• 霍尼韦尔智能技术助力中化圣奥打造智能工厂

• 2019 Vol. 66(8): 0638-

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Special Contribution

• WANG Shixiang,LIU Jiayi,HUANG Guangsu and WU Jinrong
• Synthesis and Characterization of Self-healing Elastomers Based on Hydrogen Bonding of Catechol

• 2019 Vol. 66(8): 563-568

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• Abstract:By copolymerization of catechol vinyl monomer（DMA） and butyl acrylate（BA），a random polymer BA-co-DMA was synthesized，and its structure and properties were characterized.The result showed that，catechol was introduced into acrylate polymer to obtain thermoplastic elastomer with excellent mechanical properties and self-healing properties.FTIR measurement demonstrated that BA-co-DMA formed hydrogen bonds between catechol groups，which endowed the material with high self-healing properties.The phase separation observed by AFM revealed that the interaction between catechol groups leaded to the formation of aggregates，which formed a physical cross-linked network within the polymers.High temperature promoted the molecular mobility，so that BA-co-DMA fractured sample could be repaired for 12 h at 60 ℃ with a high healing efficiency.