Applied Theory

• Jiang Pengfei,Xu Hongyan,Zhang Wenjing and Wen Dehao
• Properties of Irradiation Crosslinked NBR/ECO Blend

• 2022 Vol. 69(6): 0410-0415

  [Abstract](53)

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• Abstract:The effects of the type and amount of irradiation sensitizer on the properties of irradiation crosslinked nitrile rubber（NBR）/epichlorohydrin rubber（ECO） blend and the effects of anti-aging systems on the heat aging resistance of the blend were studied.The results showed that the crosslinking effect of irradiation sensitizer TMPTMA on NBR/ECO blend was better than that of irradiation sensitizer TAIC.With the increase of irradiation dose，the crosslinking degree of the blend increased，the shore A hardness and tensile strength were improved，and the elongation at break was reduced.However，when the irradiation dose was higher than 140 kGy，the crosslinking degree of the blend changed little.The heat aging resistance of the blend with antioxidant RD/NBC blend（blending ratio was 1/1） was the best.

• a
• Study on Kinetics of Phenolic Resin Dynamic Vulcanized EPDM/PP TPV

• 2022 Vol. 69(6): 0416-0421

  [Abstract](77)

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• Abstract:Using stannous chloride dihydrate as catalyst，the phenolic resin dynamic vulcanized ethylene-propylene diene rubber（EPDM）/polypropylene（PP） thermoplastic elastomer（TPV） was prepared，the effects of phenolic resin and stannous chloride dihydrate dosage on the vulcanization characteristics of EPDM/PP TPV and the role of co-crosslinking agents zinc oxide and high vinyl polybutadiene（HVPBd） in the vulcanization system were studied.The results showed that as the phenolic resin dosage increased，the t90 of EPDM/PP TPV was slightly prolonged，and as the stannous chloride dihydrate dosage and vulcanization temperature increased，the t90 of EPDM/PP TPV was significantly shortened，the vulcanization reaction rate constant increased obviously，and the vulcanization reaction activation energy decreased at first and then increased.Zinc oxide and HVPBd could be used to control the crosslinking density of EPDM and improve the processability and compression set resistance of EPDM/PP TPV.

• Wang Guolin and Wu Jingxuan
• Effect of Melamine Porous Sound-absorbing Material Properties on Tire Cavity Resonance Noise

• 2022 Vol. 69(6): 0422-0429

  [Abstract](91)

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• Abstract:Taking 275/70R22.5 radial tire as the research object，the tire acoustic simulation model was established.Based on the indirect coupled acoustic finite element method of LMS Virtual Lab software，fill the tire cavity with melamine porous sound-absorbing material（melamine material），the influence of melamine material on the tire cavity resonance noise was studied.The results showed that melamine material had obvious effect on reducing the tire cavity sound pressure.For tire cavity noise reduction，melamine material thickness，density and aperture had the optimal values.The tire cavity sound pressure decreased with the increase of melamine material porosity and flow resistance，but the effect of melamine material flow resistance on tire cavity sound pressure was less.

• chu fu qiang and zeng fei
• Study on Adhesion between HNBR Compound and Polyester Canvas

• 2022 Vol. 69(6): 0430-0433

  [Abstract](74)

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• Abstract:The effects of vulcanization system，rubber system and surface treatment methods of polyester canvas on the adhesion between hydrogenated nitrile rubber（HNBR） compound and polyester canvas were studied.The results showed that when the vulcanization system adopted the low sulfur content and high accelerator content vulcanization system with thiazole accelerator，the HNBR/nitrile rubber（NBR） blend ratio was 80/20，and the surface of polyester canvas was treated with body compound latex，the adhesion strength between compound and polyester canvas met the requirements of 5 kN·m-1，and this technology had the advantage of convenient operation and was suitable for industrial production.

Material · Compounding

• LIU Junle,, and
• Study on Properties of Compound Used for Mining Light Colored Flame Retardant and Antistatic Rubber Slab

• 2022 Vol. 69(6): 0434-0438

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• Abstract:The properties of the compound used for mining light colored flame retardant and antistatic rubber slab were studied.The results showed that the light colored flame retardant and antistatic rubber compound with good comprehensive properties could be obtained by using emulsion styrene butadiene rubber （ESBR），nitrile rubber（NBR） and ethylene propylene diene rubber（EPDM） as main materials respectively，selecting environmental friendly additives and designing appropriate formula.ESBR compound had better physical properties，NBR compound had better antistatic properties，EPDM compound had better flame retardant and aging resistance.

• DONG YANMAO,zhongwenxin,zhouxing,lijihang and yuanyan
• Study on Formulas and Properties of TPU/PLA Composites

• 2022 Vol. 69(6): 0439-0444

  [Abstract](75)

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• Abstract:Thermoplastic polyurethane elastomer（TPU）/polylactic acid（PLA） composites were prepared by extrusion molding，and the effect of plasticizer dibutyl phthalate（DBP），naphthenic oil and titanate coupling agent on the mechanical properties and thermal properties of the composites were investigated.The results showed that，DBP and naphthenic oil had good plasticizing effect on TPU/PLA composites，and their addition was beneficial to the extrusion processing of the composites，but DBP would reduce the mechanical properties of the composite.Titanate coupling agent TCA-101 had a good reinforcing effect on the composite.When the dosages of TPU，PLA and naphthenic oil were 178，20 and 2 g，respectively，the tensile strength of the composites reached 100.54 MPa，and the elongation at break reached 429%.

• NIE Wanjiang,LI Wendong,ZENG Ji,HAN Hui and YUN Xiaobi
• Study on Formula and Properties of Agricultural Machinery Rubber Track Compound

• 2022 Vol. 69(6): 0445-0448

  [Abstract](76)

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• Abstract:The formula of agricultural machinery rubber track compound was improved by using carbon black/silica blending reinforcement system and adding a small amount of tear resistant additives，to improve the cutting resistance of rubber track compound.The results showed that，compared with the production formula compound，the Mooney viscosity and scorch time of the improved formula compound were similar，F_L and F_max were reduced，the modulus at 300% elongation and modulus at 500% elongation slightly increased，the tensile strength，tear strength and aging resistance were similar，the elongation at break was reduced，and the cutting resistance was improved，which was helped to solve the early damage problem of rubber track groove bottom crack.

Product · Design

• GUO Yong and ZHAO Yating
• Compound Formula Optimization and Ultimate Shear Performance Analysis of Horizontal Force Dispersion Type Rubber Bearing

• 2022 Vol. 69(6): 0449-0454

  [Abstract](77)

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• Abstract:The compound formula optimization of the horizontal force dispersion type rubber bearing，the effect of adhesive film thickness on the adhesion between compound and steel plate and the horizontal ultimate shear performance of the rubber bearing were studied.The results showed that the vulcanizing reversion resistance and heat resistance of the compound could be significantly improved by the SBR/NR blending and the accelerator CBS/DTDM blending.The compound optimum formula of the rubber bearing was NR/SBR（blending ratio was 60/40）　100，carbon black N774　35，zinc oxide　5，stearic acid　1.5，naphthenic oil　15，antioxidant RD　2，antioxidant 4010NA　2，sulfur　1，accelerator CBS/DTDM（blending ratio was 4/1）　5.It was suitable that the primer coating film thickness of the adhesive was 10～15 μm，and surface coating film thickness was 25～30 μm.Under the conditions of 100% shear displacement，200% shear displacement，300% shear displacement and 400% ultimate shear displacement，the horizontal stiffness of LNR 600 horizontal force dispersion type rubber bearing was 0.91，0.85，0.85 and 0.96 kN·mm^-1 respectively，and all horizontal stiffness deviations were within ±15%，which met the design requirement.

• WANG Chuanzhu,ZHAO Jun,LIU Limin and YIN Hongxin
• Development of 36.00R51 Flame Retardant and Giant Off-the-road Radial Tire

• 2022 Vol. 69(6): 0455-0458

  [Abstract](91)

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• Abstract:The development of 36.00R51 flame retardant and giant off-the-road radial tire was introduced.According to the operating conditions of slag pot carrier vehicle，the oxygen indexes of flame retardant tread compound and sidewall compound with decabromodiphenyl ether，zinc borate and antimony trioxide retardant materials were more than 24%，and their flame retardant performances were greatly improved.The 36.00R51 flame retardant and giant off-the-road radial tire produced with flame-retardant tread compound and sidewall compound could effectively prevent the tire from burning failure caused by high-temperature waste residue water,and its average service life reached 154 d，40% longer than that of competitive tire，which reduced the use cost of the tire and the safety risk in the transportation process of slag pot carrier vehicle.

• Liu jiajian,Liu zhiguo,Cao jiangyong and Lai qingcun
• Study of Influence Degree of Cord Layers Parameters on Static Characteristics of Free Diaphragm Air Spring

• 2022 Vol. 69(6): 0459-0465

  [Abstract](35)

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Technology · Equipment

• He Fangke,Hu Yuyou,DING Binxuan and Li Jian
• Effect of Vulcanization Process Parameters on Adhesives Properties and Humidity and Heat Aging Resistance of NR Compound Shock-absorbing Bushing for Automobile

• 2022 Vol. 69(6): 0466-0469

  [Abstract](63)

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• Abstract:Effects of vulcanization process parameters on the adhesives properties and humidity and heat aging resistance of natural rubber （NR） compound shock-absorbing bushing were studied by orthogonal test. The results showed that，the shore A hardness of NR compound increased after humidity and heat aging，and the tensile strength and elongation at break decreased. Combination of vulcanization process parameters for the best stability of the adhesive properties of NR compound shock-absorbing bushing was vulcanization time of 600 s，vulcanization temperature of 155 ℃ and injection pressure of 21 MPa. After humidity and heat aging and heat aging under temperature of 70 ℃，humidity of 85%～100% and parking time of 504 h，the average value of the maximum destructive force of NR compound shock-absorbing bushing was 22.74 kN， and the compound coating rate after destroy was 100%，which could meet the requirements of the rubber-material framework adhesion of NR compound shock-absorbing bushing

Testing · Analysis

• WANG Baoxing,LIU Jingping and LUO Yiwen
• Analysis of Steel Wire Rust of Steel Wire Reinforced Hydraulic Hose

• 2022 Vol. 69(6): 0470-0473

  [Abstract](65)

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• Abstract:The failure causes of the steel wire reinforced hydraulic hose and the influence of external environment on its steel wire rust were studied.The results showed that the enviromental temperature and humidity were important factors leading to the steel wire rust of the steel wire reinforced hydraulic hoses.Among them，the influence of humidity was greater than that of temperature.The presence of chlorine elements accelerated the rust rate of the steel wire.Therefore，reasonable control of the storage and use environment of the raw steel wire was very important to ensure the quality of the steel wire.The selection of the rubber type and the formula optimization of the compound，and the production process adjustment of the hose all played an important role in improving the quality of the steel wire reinforced hydraulic hose.

Gomprehensive and Special Review

• WANG Zixuan,SONG Weixiao,LU Yonglai and ZHANG Liqun
• Research Progress of ENR as Macromolecular Interfacial Modifier

• 2022 Vol. 69(6): 0474-0479

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• Abstract:The research progress of epoxidized natural rubber（ENR）as macromolecular interfacial modifier was introduced.ENR was used to improve the compatibility between rubber and filler，between rubber and rubber and other polymers，so as to prepare multicomponent composites with excellent performance，low production cost and good environmental protection performance.The development of ENR interfacial modifier with low relative molecular weight，high dispersion and strong end sealing ability is the key research direction in the future.

国内外动态

• 赵敏
• 一种螺旋纳米碳纤维增强橡胶复合材料及其制备方法

• 2022 Vol. 69(6): 0444-0444

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• 赵敏
• 一种高阻隔性三元乙丙橡胶的制备方法

• 2022 Vol. 69(6): 0444-0444

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• 赵敏
• 一种耐寒防腐型硅橡胶特种电缆

• 2022 Vol. 69(6): 0444-0444

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• 赵敏
• 用于拉丝机机械手夹爪的三元乙丙橡胶材料及其制备方法

• 2022 Vol. 69(6): 0448-0448

  [Abstract](40)

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• 赵敏
• 耐磨氟橡胶及其应用以及密封制品的无痕分段硫化方法

• 2022 Vol. 69(6): 0448-0448

  [Abstract](36)

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• 赵敏
• 一种电子元件用耐热耐水解型橡胶高分子复合型胶粘剂

• 2022 Vol. 69(6): 0454-0454

  [Abstract](39)

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• 赵敏
• 羟甲基化木质素改性新癸酸钴/天然橡胶共沉胶、制备方法及应用

• 2022 Vol. 69(6): 0454-0454

  [Abstract](34)

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• 赵敏
• 一种超韧耐热聚乳酸/橡胶合金及其制备方法

• 2022 Vol. 69(6): 0465-0465

  [Abstract](38)

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• 赵敏
• 一种用于低表面能硅橡胶表面的双面胶带及其制备方法

• 2022 Vol. 69(6): 0465-0465

  [Abstract](33)

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• 赵敏
• 一种丁腈橡胶密封材料及其制备方法和应用

• 2022 Vol. 69(6): 0465-0465

  [Abstract](38)

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• 吴淑华
• 中国石油试产丁腈橡胶新品

• 2022 Vol. 69(6): 0470-0479

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Special Contribution

• LI Sai,DUAN Pengwei,YUE Tongkui,LIU Jun and ZHANG Liqun
• Study on Aging Mechanism of Foamed EPDM under Hot Air，High Humid Heat and Salt-fog Environment

• 2022 Vol. 69(6): 0403-0409

  [Abstract](40)

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• Abstract:The aging mechanism of foamed ethylene-propylene-diene rubber（EPDM） under hot air，humid heat and salt-fog environment was studied.The results showed that，for the foamed EPDM with the saturated rubber molecular main chain structure，the hot air aging，humid heat aging and salt-fog aging had little damage to the rubber molecular main chain structure.The secondary crosslinking caused by hot air aging could improve the cross-linking density of foamed EPDM，and the higher the temperature was，the more intense the secondary cross-linking was.After reaching extreme value of the cross-linking density of foamed EPDM，the cross-linking density decreased with the further extension of the aging time.Humid heat aging could accelerate the secondary cross-linking of foamed EPDM during the aging process，salt-fog aging had little effect on crosslink density.