Applied Theory

• WANG Guolin, AN Dengfeng, WU Xu and LIANG Chen
• Effect of Tread Pattern Parameters on Rolling Resistance of PCR Tire

• 2019 Vol. 66(2): 0083-0088

  [Abstract](71)

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• Abstract:A 3D pattern FEA model of 205/55R16 PCR tire was established. The regression analysis was used to analyze the relationship between the tread pattern design parameters and rolling resistance. The depth of vertical groove and horizontal groove, and the width of vertical groove and transverse groove were selected as the design parameters，and schemes were designed by response surface analysis method. The results showed that the influence degree of four design parameters on rolling resistance decreased in the order of: vertical groove width，vertical groove depth，horizontal groove width，and horizontal groove depth. The relationship formula between tread pattern design parameters and rolling resistance was fitted by the least squares method，which was used to predict and optimize the tire pattern design parameters. Compared the tire with original pattern design parameters，the rolling resistance of the tire with the optimized pattern design parameters was reduced by 3.89%.

• SU Tian, XIE Lili, ZHENG Long, XU Zongchao, LIU Li and WEN Shipeng
• Structure and Properties of Octadecylamine Modified Graphene Oxide/ ESBR Composite

• 2019 Vol. 66(2): 0089-0096

  [Abstract](60)

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• Abstract:The graphene oxide（GO） was modified by octadecylamine （ODA），the octadecylamine functionalized graphene oxide（ODA-GO）/emulsion styrene-butadiene rubber（ESBR） composite was prepared by emulsion composite method，and its structure and properties were studied. The results showed that，the dispersion of ODA-GO in ESBR was good，and strong filler network could be formed with small amount of ODA-GO. Compared with ESBR compound，the loss factor（tanδ） of ODA-GO/ESBR composite increased at 0 ℃and decreased at 60 ℃. As the addition level of ODA-GO increased，the physical properties and airtight property of the composite were improved.

• SU Xiaofeng, FU Ping, DING Zhongjun, LI Dewei and YANG Mingfei
• Establishment and Simulation Analysis of Tire Finite Element Model Based on Abaqus Software

• 2019 Vol. 66(2): 0121-0127

  [Abstract](64)

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• Abstract:The tire finite element model was established based on Abaqus software，and the inflated peripheral dimension，shoulder stress distribution，belt stress distribution and bead and rim contacting stress distribution of 305/75R24.5 truck and bus radial tire were predicted and analyzed. The FEA simulation results showed that，the inflated peripheral dimension of the tire met the requirements of the national standard，and the subsidence rate under static load met the overall stiffness requirements of the tire. The maximum shoulder stress was located at the end of the 3^# belt, and the stress value of the 2^# belt was less than that of the 3^# belt under the condition of inflation and static load. The contact stress between the bead and rim was high around the location of interference fit.

• Wen Shao,Zhang qing-zhi and Wu ai-qin
• Qualitative and Quantitative Analysis of Accelerator DPG in Vulcanizates by UPLC/Q-TOF MS

• 2019 Vol. 66(2): 0151-0154

  [Abstract](42)

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• Abstract:A qualitative and quantitative analysis of the accelerator DPG in vulcanizates was established by UPLC/Q-TOF MS，gradient elution with acetonitrile＋water（volume fraction of methanoic acid was 0.000 3） as mobile phase was applied，and ESI source and positive ion mode were used for mass-spectrometry. The results showed that，the standard curve of accelerator DPG solution had good linearity with the real value in the range of mass concentration from 1 to 1 000 ng?mL^-1，R² was 0.995，the detection limit was 0.01 ng?mL^-1，and the recovery was 94.0%～100.5%.

Material · Compounding

• LIN Guangyi, WANG Honghao, YU Kaiben, ZONG Le and LI Tianya
• Study on Properties of Chloroprene Rubber for Deep-sea Watertight Connectors

• 2019 Vol. 66(2): 0097-0100

  [Abstract](69)

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• Abstract:The influence of curing system，curing time and reinforcement system on the properties of chloroprene rubber 2442（CR2442） for deep sea watertight connectors were investigated. The results showed that，the tensile strength of the compound was the best as the curing time was 60 min. The hardness of CR2442 compound could increase by 0.4-0.5 as the addition level of carbon black N550 or silica increased by 1 phr. The optimal formulation was as follows：CR2442　100，carbon black N550　20，silica　10，ZnO　4，MgO　2，aromatic oil　14，active agent SAD　0.5，antioxidant RD　1，antioxidant 4010　2，sulfur　2，and accelerator DM　0.15. The properties of the compound met the requirements of deep-sea watertight connector.

• Yan He,Chang Guo,Jin Xu and Lian-lei Cui
• Properties of Carbon Nanotube/NR Composite by Latex Slurry

• 2019 Vol. 66(2): 0101-0105

  [Abstract](61)

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• Abstract:The carbon nanotubes（CNTs）/NR composite was prepared by slurry blending method，and its properties were investigated. The results showed that，compared with mechanical blending method and latex blending method，slurry blending method could make CNTs well distributed in NR matrix，the thermal conductivity of CNTs/NR composite was stable，and the tensile strength and tear strength were improved.

• wangjian,wang jian and hu shui
• Effects of Silica with Different Structure on Properties of Green Tire Tread Compound

• 2019 Vol. 66(2): 0106-0110

  [Abstract](65)

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• Abstract:The effects of silica with different structure on the properties of green tire tread compound [solution polystyrene-butadiene rubber（SSBR）/cis-butadiene rubber（BR） blend] were studied. The results showed that，the average particle size of silica 1165MP was the smallest，the reinforcing property was the best，and the wet slip resistance of the filled compound was the best. Silica WL180 was uniformity dispersed in the SBR/BR blend，and the rolling resistance of the filled compound was the lowest. The dispersion of silica VN3 in SBR/BR blends was the best. The average particle size of silica T383 was the largest，and the reinforcing property was the worst. The dispersion of silica DNS2 was poor，and Payne effect of the filled compound was the most obvious.

• XU Ensong,YANG Jun,FAN Zhiwei and ZHAO Qitian
• Effect of Modified Aramid Short Fiber and Sodium Polyacrylate on Properties of NBR Water Swelling Rubber

• 2019 Vol. 66(2): 0111-0115

  [Abstract](65)

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• Abstract:Aramid short fiber was modified by phosphoric acid etching，nitrile-butadiene rubber（NBR） water swelling rubber was prepared by adding modified aramid short fiber as reinforcing filler into the NBR compound with 20 phr carbon black and 20 phr silica. The effects of the addition levels of sodium polyacrylate (water absorbent resin) and modified aramid short fiber on the physical properties and water absorption of NBR water swelling rubber were studied. The results showed that，the addition level of sodium polyacrylate had great influence on the tensile strength，elongation at break，water swelling rate and mass loss rate of NBR water swelling rubber. The suitable addition level of sodium polyacrylate was 60 phr. The hardness and tensile strength of NBR water swelling rubber increased as the addition level of modified aramid short fiber increasing，and meanwhile the water swelling rate and mass loss rate of NBR water swelling rubber decreased. The suitable addition level of modified aramid short fiber was 4 phr.

• heshuwei, WANG Menggao, MA Mengli, ZOU Xunfa, LIU Yonggang and HE Yingping
• Optimization of Natural Latex Modified by Graphene Oxide

• 2019 Vol. 66(2): 0116-0120

  [Abstract](64)

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• Abstract:Natural latex was modified by graphene oxide，and the influence of graphene oxide dosage，vulcanization system and vulcanization process parameter on the strength properties of the vulcanized rubber film was studied using orthogonal experimental design. The results showed that，in the scope of the experiment，using tensile strength and tear strength as the optimization targets，the optimal solution of graphene oxide modified natural latex was 0.125 phr of graphene oxide，1 phr of sulfur，0.4 phr of zinc oxide，1 phr of accelerator PX，75 ℃ curing temperature，and 1 h curing time. The tensile strength of the vulcanized film of the optimized latex was 28.83 MPa and the tear strength was 65 kN?m^-1.Compared with the blank sample without graphene oxide，the tensile strength of the vulcanized film of the optimized latex increased by 45.83%，and the tear strength increased by 51.16%，indicating that graphene oxide had good reinforcing effect on natural rubber.

• WANG Haiyan and WANG Hong
• Effect of Mixing Process on Properties of SBR/BR Blend

• 2019 Vol. 66(2): 0128-0133

  [Abstract](64)

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• Abstract:The effect of mixing process on the properties of styrene butadiene rubber（SBR）/butadiene rubber（BR） blend was investigated. The results showed that，with the process in which pretreated silica was added first and carbon black was added in the second stage, the dispersion of the filler was improved，the rubber compound had a large content of bound rubber，good physical properties and wear resistance. At the same rotor speed，with the increase of mixing temperature，the strength and wear resistance of the vulcanized rubber were generally improved. At the same mixing temperature，with the increase of rotor speed，the strength and wear resistance of the vulcanized rubber were generally improved，and the heat build-up decreased. When the mixing temperature and rotor speed were too high，the comprehensive performance decreased. When the mixing temperature was 90 ℃ and the rotor speed was 70 r?min^-1，the comprehensive performance of the vulcanized rubber was better.

Technology · Equipment

• Xuan Shupeng,bianhuiguang,songfengpeng,liujie and wangchuansheng
• Comparative Study on Energy Consumption and Compound Property of Dry and Wet Mixing Process

• 2019 Vol. 66(2): 0134-0137

  [Abstract](62)

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• Abstract:The energy consumption and compound properties of dry and wet mixing process（high temperature atomization drying）were comparatively studied. The results showed that，compared with dry mixing，the wet mixing not only reduced dust pollution and decreased power consumption by about 30%，but also greatly improved the dispersion of fillers，substantially improved the comprehensive physical properties of the vucanizates，and reduced rolling resistance. The wet mixing process was energy-saving and environmental friendly, and improved the performance of rubber products.

• WANG Chuan Sheng, CAI Ning, BIAN Hui-guang, CHAO Yu Qi, WANG Hu Zi and ZHANG Wei
• Molding Process Parameters on Thermoplastic Polyurethane Elastomers for Powder Feeding 3D Printing

• 2019 Vol. 66(2): 0138-0141

  [Abstract](57)

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• Abstract:Based on the powder feeding 3D printer，using tensile strength as an index，the best molding process parameters of granular thermoplastic polyurethane elastomers were determined by the orthogonal test method as follows：barrel temperature　215 ℃，screw speed　8 r?min^-1，nozzle temperature　230 ℃，and print platform temperature　45 ℃. The best molding process parameters were verified by printing tire and honeycomb model.

• Wu Zhancheng,Li Wendong,YANG Maolin,ZENG Ji,CAI Qing,HUANG Zhenhua and SHI Daquan
• Study on Non-isothermal Curing Process of Giant OTR Radial Tire

• 2019 Vol. 66(2): 0142-0145

  [Abstract](40)

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• Abstract:Non-isothermal curing process of giant OTR radial tire was studied. The results showed that，compared with the traditional curing process，giant OTR radial tire cured with non-isothermal process（heating time/dwell time ratio was 1/1.07） had a lower degree of over curing and better physical properties，non-isothermal curing process could improve vulcanization uniformity and solve the problem that some parts were over cured seriously. By adjusting the heating time/dwell time ratio during non-isothermal curing process，properties and production efficiency of giant OTR radial tire were improved，and the energy consumption of the production process was reduced.

• huhaiming and wangshasha
• Analysis of Mechanical Properties of Top Cover of Tire Mold

• 2019 Vol. 66(2): 0146-0150

  [Abstract](40)

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• Abstract:Based on the stress analysis of the top cover of the tire mold under curing conditions and according to the elastic-plastic mechanics theory of thin plate，the simplified mechanical model of top cover was established. The effect of different structural forms on the stress and strain of the top cover of tire mold 1188 shell was analyzed by finite element simulation. The results showed that，increasing the area of top cover slide could reduce the stress and strain of top cover. When the top cover and the top side plate were integrated and both were made of Q235 steel，the stress of top cover was less than the allowable stress of Q235 steel，and the deformation was less than 0.05 mm，which met the design requirements. The stress and deformation of top cover with an integral structure of top cover and top side plate were smaller.

Gomprehensive and Special Review

• Lv Mingzhe, Li Zhifeng, Pan Junren, Yang Ziming, Li Yongzhen, Tao Jinlong and Li Puwang
• Challenges of China’s Natural Rubber Latex Products Industry

• 2019 Vol. 66(2): 0155-0159

  [Abstract](40)

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国内外动态

• zhangzhao
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• 2019 Vol. 66(2): 0110-0110

  [Abstract](56)

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• 利
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• 2019 Vol. 66(2): 0115-0115

  [Abstract](51)

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• WU Xiulan
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• 2019 Vol. 66(2): 0115-0115

  [Abstract](63)

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• 赵敏
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• 2019 Vol. 66(2): 0115-0115

  [Abstract](54)

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• 赵敏
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• 2019 Vol. 66(2): 0127-0127

  [Abstract](54)

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• 赵敏
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• 2019 Vol. 66(2): 0127-0127

  [Abstract](58)

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• 赵敏
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• 2019 Vol. 66(2): 0127-0127

  [Abstract](61)

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• 赵敏
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• 2019 Vol. 66(2): 0133-0133

  [Abstract](60)

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• 吴淑华
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• 2019 Vol. 66(2): 0133-0133

  [Abstract](57)

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• 吴淑华
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• 2019 Vol. 66(2): 0141-0141

  [Abstract](43)

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• 吴淑华
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• 2019 Vol. 66(2): 0150-0150

  [Abstract](36)

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• 赵敏
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• 2019 Vol. 66(2): 0154-0154

  [Abstract](40)

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• Abstract:

• 赵敏
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• 2019 Vol. 66(2): 0154-0154

  [Abstract](39)

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• Abstract: