Applied Theory

• WANG Guo-lin,QIAO Lei,ZHOU Hai-chao,LIANG Chen and LI Guo-rui
• Study on Noise Reduction Method of Truck and Bus Radial Tire Based on Finite Element Simulation

• 2019 Vol. 66(4): 0243-0248

  [Abstract](72)

  [HTML()]

  [PDF](34)

• Abstract:The influence of structural designs on the vibration noise of the truck and bus radial tire was studied by finite element simulation analysis. A tire finite element analysis model was established and verified by experimental test，and the belt structure and tread pattern were optimized based on the original tire structure. The vibration noise of the tire with different design was obtained by using acoustic simulation software. The results showed that the design of the belt structure and tread pattern had significant influence on vibration noise of the tire. The maximum noise reductions obtained by belt structure optimization and tread pattern optimization were 3.09 and 3.9 dB，respectively.

• LI HUI,GAO YANG,Zhangjin,GUO Xiangyun and TANG Zhimin
• Leachability of New Antioxidant N3100 in NR and Its Mechanism Study

• 2019 Vol. 66(4): 0249-0255

  [Abstract](78)

  [HTML()]

  [PDF](28)

• Abstract:The molecular models of NR and component A，B and C of the antioxidant N3100 were established by molecular simulation technology，the solubility and mobility of those three components in NR compound were studied，and the leachability of antioxidant N3100 in the compound was analyzed. Various amount of each component was added into NR compound and the blooming of the compound was recorded. The results showed that，compared with antioxidant 3100，each component of antioxidant N3100 could be synthesized separately and its proportion could be adjusted，and the effective content was high. The maximum amounts of component A，B and C in NR compound were 0.25，0.5 and 2 phr，respectively，without blooming at room temperature.

• LI Bo, GONG Hongguang, WANG Qi, ZHOU Lei, HU Haihua and GONG Guangbi
• Study on Dynamic Compression Property of SSBR/NdBR and SSBR/NiBR Blends

• 2019 Vol. 66(4): 0256-0259

  [Abstract](66)

  [HTML()]

  [PDF](61)

• Abstract:The deformation，heat build up and viscoelasticity of SSBR/NdBR and SSBR/NiBR blends under dynamic compression were comparatively studied. The results showed that with the increasing of the additional level of BR，the dynamic compression deformation and tanδ of SSBR/BR blend decreased，the compression fatigue temperature rising，resilience and storage modulus increased，and the loss modulus first decreased and then increased. Compared with SSBR/NiBR blend，SSBR/NdBR blend had a lower compression fatigue temperature rising，compression deformation and tanδ，better deformation recovery ability and lower heat build up.

• CUI Yu-guo,KANG Hai-lan and FANG Qing-hong
• Effect of Hot Acid Environment on Properties of Fluororubber

• 2019 Vol. 66(4): 0260-0263

  [Abstract](83)

  [HTML()]

  [PDF](25)

• Abstract:Hot acid immersion corrosion experiments were carried out on fluororubber 246 using hydrochloric acid solution with a mass fraction of 0.05 hydrochloric acid at 80 ℃. The thermal performance，tensile properties and surface morphology of the samples before and after immersion were tested. The results showed that，the hot hydrochloric acid immersion had little influence on the thermal performance of the sample，and the tensile properties decreased. The smooth sample surface became rough from smooth after acid immersion，and holes with different size were formed on the sample surface. The addition of barium sulfate could inhibit the corrosion of hot hydrochloric acid.

Material · Compounding

• yanghuaxi,zhangjiyang,lihongxia,tianming and zouhua
• Preparation and Properties of Graphene/MVQ Conductive Composite

• 2019 Vol. 66(4): 0264-0269

  [Abstract](66)

  [HTML()]

  [PDF](24)

• Abstract:The graphene/methyl vinyl silicone rubber（MVQ） composite was prepared using MVQ as matrix and graphene as conductive filler，and the influence of the type and addition level of graphene on the physical properties and electrical conductive property of the composite was investigated. The results showed that，graphene LKR6963 had a high peeling degree，very thin lamellae and relatively few defects，and it could easily form a conductive network in silicone rubber matrix and improve the electrical conductive property of the composite. As the addition level of graphene LKR6963 increased，the hardness and tensile strength of the composite increased significantly，while the volume resistivity decreased gradually.

• ZHANG Yuefa,SHAO Huafeng,WANG Riguo and He Aihua
• Properties of Silica Reinforced NR/TBIR Blends

• 2019 Vol. 66(4): 0270-0274

  [Abstract](62)

  [HTML()]

  [PDF](60)

• Abstract:The properties of silica reinforced natural rubber（NR）/high trans-1，4-butadiene isoprene rubber（TBIR） blend were investigated. The results showed that，the strength of NR compound was improved by blending with TBIR. With the increase of TBIR amount，the compression set and DIN wear of the NR/TBIR vulcanizate and silica reinforced NR/TBIR vulcanizate were reduced，the flexural fatigue resistance and tensile fatigue resistance were greatly improved，and the static friction coefficient and dynamic friction coefficient increased. The average particle size of silica aggregates in the silica reinforced NR/TBIR vulcanizate was smaller than that in the silica reinforced NR vulcanizate，and the dispersion of silica in rubber matrix was improved.

• shichengwang,sunshuquan,zhangjiyang and zouhua
• Preparation and Performance of BR/SBR Foaming Materials

• 2019 Vol. 66(4): 0275-0279

  [Abstract](61)

  [HTML()]

  [PDF](47)

• Abstract:The effects of the amount of sulfur and foaming agent OBSH-75，and the pre-curing process on the properties of butadiene rubber（BR）/styrene-butadiene rubber（SBR） foaming materials were investigated. The results showed that the cell diameter of the foaming materials with 2 phr sulfur and 3 phr foaming agent was smaller，the cell was uniform with closed structure，the dynamic and static stiffness ratio was smaller，and the physical properties and shock absorption property were better. When the pre-curing temperature and pre-curing time were 125 ℃ and 14 min，respectively，the cell density of the foaming materials was moderate，the dynamic and static stiffness ratio was small，and the shock absorption property was good.

• ZHANG Gui-mei,JIANG Shi-kuan,YAN Li,XU Rong and ZOU Jian-yun
• Properties of Different Constant Viscosity NR with Low Viscosity

• 2019 Vol. 66(4): 0280-0283

  [Abstract](66)

  [HTML()]

  [PDF](48)

• Abstract:Several kinds of constant viscosity natural rubber（NR） with low viscosity（NR-HH，NR-HS，NR-SH and NR-MB） were prepared with hydroxylamine hydrochloride，hydroxylammonium sulphate，semicarbazide hydrochloride and accelerator M as viscosity stabilizer，respectively，and their physicochemical properties，storage performance，curing behavior and physical properties were studied. The results showed that，P0 values of NR-HH，NR-HS，NR-SH and NR-MB were lower than that of NR-CK，and PRI of NR-MB was significantly lower compared with that of NR-CK. The curing rate of NR-MB compound was faster than that of NR-CK compound，and the curing rates of NR-HS，NR-HH and NR-SH compound were slower than that of NR-CK compound. The tensile strength and tear strength of NR-HH，NR-HS and NR-SH vulcanizates were equivalent and all worse than those of NR-CK vulcanizate，but the tensile strength and tear strength of NR-MB vulcanizate were higher than those of NR-CK vulcanizate，respectively. All these viscosity stabilizers could effectively decrease the Mooney viscosity of NR and improve the hot air aging resistance. Among them，hydroxylamine hydrochloride and hydroxylammonium sulphate showed a better effect on the stabilization of NR viscosity.

• zhoushizhang,liuli,hushui and wenshipeng
• Properties of LDHs/ENR/SBR Gas Barrier Composites

• 2019 Vol. 66(4): 0284-0287

  [Abstract](67)

  [HTML()]

  [PDF](62)

• Abstract:Layered double hydroxide compounds（LDHs）/epoxidized natural rubber（ENR）/styrene-butadiene rubber（SBR） gas barrier composites were prepared and the effect of the amount of LDHs on the curing characteristics，physical properties，dynamic mechanical properties，airtightness and flexural resistance of the composites was investigated.The results showed that，with the increasing of the amount of LDHs，t₉₀ of the composites was shortened，the tensile strength had an increasing trend，and the storage modulus had little change in the glass state and increased in the high elastic state.Compared with the composites without LDHs，the loss factor of the composites with LDHs decreased in the transition zone（0 ℃），and increased in the high temperature zone（60 ℃）.The airtightness and flexural resistance of the composites with 5 phr LDHs were better.

Product · Design

• FU Ping, DING Zhongjun, SU Xiaofeng, LI Dewei and LI Zhengguang
• Finite Element Analysis of Seal Ring of Deep Sea Motor by Workbenchch

• 2019 Vol. 66(4): 0288-0291

  [Abstract](62)

  [HTML()]

  [PDF](57)

• Abstract:The finite element model of the seal ring of deep sea motor was established by Workbench to calculate the force and deformation of seal ring during installation and operation. The results showed that the stress of the sealing ring increased firstly and then decreased during installation. When the shell moved at a distance of 0.17 mm，the stress of the sealing ring was the largest in Y direction. As the shell continued to move，the stress on the seal ring gradually decreased. When the movement distance was over 0.86 mm，the stress on the seal ring changed little. The stress on the seal ring in X direction could indicate pre-tightening force. When the motor was running，the biggest stress of the sealing ring was larger than the preloading force at the time of installation，which could ensure that the motor was working properly.

• DUAN Wenwen,ZHAO Huaqiang,YU Yao,WANG Yuekun,WANG Hongzhen and XIN Zhenxing
• Application of Constant Viscosity NR Cup Lump in Base Rubber of V-Belt

• 2019 Vol. 66(4): 0292-0296

  [Abstract](74)

  [HTML()]

  [PDF](86)

• Abstract:Constant viscosity modification of natural rubber（NR） cup lump with viscosity stabilizer hydroxylamine hydrochloride（HH） was investigated. The effect of HH mass fraction on NR performance and the application of constant viscosity NR in V-belt base rubber were studied. The results showed that，the constant viscosity NR with different Mooney viscosity could be prepared by changing the HH mass fraction. The elastic modulus of constant viscosity raw NR modified by HH decreased，and the loss factor increased. The processability of the V-belt base rubber prepared by constant viscosity NR modified by HH was improved，the vulcanization speed increased，mixing energy consumption was reduced，production efficiency was improved， and the physical properties，flexing resistance and carbon black dispersion were improved. The V-belt base rubber with constant viscosity NR modified by HH with the mass fraction of 0.005 had the highest tensile strength and the best flexing resistance.

Technology · Equipment

• Lin Guang-yi,Kong Ling-wei,Wang Quan-jie,Wang Xiang,Jing Yuan and Zhu Lian-chao
• Influence of Mill Runs during Plasticizing on Plasticity and Physical Properties of NR Produced in China and Thailand

• 2019 Vol. 66(4): 0297-0303

  [Abstract](71)

  [HTML()]

  [PDF](83)

• Abstract:In this study，natural rubber（NR） was milled by using a two-roll mill，and the influence of the number of milling cycles during plasticizing on the plasticity and physical properties of NR produced in China and Thailand（SCR20 and STR20，respectively） was investigated.The results showed that，with the milling number increasing，the Mooney viscosity，plasticity and shear storage modulus（G′） of NR raw rubber decreased，and the loss factor（tanδ）increased.When the milling number was the same，the G′ of SCR20 raw rubber was larger than that of STR20 raw rubber，and tanδ was smaller than that of STR20 raw rubber.With the mill number increasing，the discharge temperature of the mix was reduced，the Payne effect was weakened，and the vulcanization rate increased.It was found that STR20 possessed the highest tensile strength when the milling number was 20，while SCR20 possessed the highest tensile strength when the milling number was 30.The results of dynamic mechanical analysis showed that with the milling number increasing，the wet skid resistance of the vulcanizate was improved，the rolling resistance increased，and the vulcanizate possessed the best dynamic mechanical properties when the milling number was 30 for SCR and 20 for STR20.

• shan xin
• Continuous Gasification Solvent Method of Insoluble Sulfur

• 2019 Vol. 66(4): 0304-0306

  [Abstract](64)

  [HTML()]

  [PDF](66)

• Abstract:

• huhaiming and wangshasha
• Analysis of Stiffness and Fatigue Life of Top Cover of Truck and Bus Tire Mold

• 2019 Vol. 66(4): 0307-0310

  [Abstract](34)

  [HTML()]

  [PDF](52)

• Abstract:Based on the stress analysis of the top cover of truck and bus tire mold under the curing condition and the calculation theory of circular thin plate in the theory of plate and shell，the formula for calculating the maximum deflection and stress of top cover was obtained. The finite element simulation was used to verify the stiffness of top cover，and the minimum thickness and fatigue life of the top cover with different materials were obtained by calculation. The results showed that，the minimum thickness of the top cover with different material was different.The maximum deformation of 45# steel and Q235 steel top cover was reduced by 0.05 mm，which met the design requirements of top cover stiffness.Compared with Q235 steel top cover，the minimum thickness of 45# steel top cover was 1 mm less，the fatigue life was extended by 2.09%，the service life was extended by 2.22%，and the 45# steel top cover had better performance.

Testing · Analysis

• Zhang Zhongwen,Wang Xuekong,Tang Qingyun,Zhong Yunlong and Lin Tingting
• Study on Test Method for Storage Life Evaluate of Conductive Sealing Strip

• 2019 Vol. 66(4): 0311-0313

  [Abstract](31)

  [HTML()]

  [PDF](50)

• Abstract:

Gomprehensive and Special Review

• ZHANG Zhenshan,WU Jianming,WANG Xiaolei and WANG Chunfu
• Research Progress of Hydrogenated Nitrile Butadiene Rubber and Application of Molecular Simulation Technology on It

• 2019 Vol. 66(4): 0314-0318

  [Abstract](34)

  [HTML()]

  [PDF](75)

• Abstract:

国内外动态

• 吴淑华
• 全球氢化丁腈橡胶市场快速增长

• 2019 Vol. 66(4): 0248-0248

  [Abstract](61)

  [HTML()]

  [PDF](28)

• Abstract:

• 赵敏
• 

• 2019 Vol. 66(4): 0255-0255

  [Abstract](68)

  [HTML()]

  [PDF](32)

• Abstract:

• 赵敏
• 

• 2019 Vol. 66(4): 0255-0255

  [Abstract](68)

  [HTML()]

  [PDF](29)

• Abstract:

• 吴淑华
• 越南橡胶出口将放缓

• 2019 Vol. 66(4): 0259-0259

  [Abstract](62)

  [HTML()]

  [PDF](35)

• Abstract:

• 吴淑华
• 西布尔增产聚丁二烯

• 2019 Vol. 66(4): 0263-0263

  [Abstract](61)

  [HTML()]

  [PDF](31)

• Abstract:

• 吴淑华
• 印度终止对华氟橡胶反补贴调查

• 2019 Vol. 66(4): 0263-0263

  [Abstract](60)

  [HTML()]

  [PDF](30)

• Abstract:

• 吴淑华
• 美发布对华载重轮胎“双反”税令

• 2019 Vol. 66(4): 0303-0303

  [Abstract](61)

  [HTML()]

  [PDF](29)

• Abstract:

• WU Xiulan
• Alliance的Forestar产品线新增2款CTL轮胎

• 2019 Vol. 66(4): 0310-0310

  [Abstract](32)

  [HTML()]

  [PDF](24)

• Abstract:

• WU Xiulan
• 大陆推出VikingContact 7新一代冬季轮胎

• 2019 Vol. 66(4): 0313-0313

  [Abstract](31)

  [HTML()]

  [PDF](23)

• Abstract:

• 利
• 普利司通美洲公司将在阿克隆建立新的赛车轮胎工厂

• 2019 Vol. 66(4): 0319-0319

  [Abstract](33)

  [HTML()]

  [PDF](29)

• Abstract: