不同环氧度的ETPI对ETPI/NR并用胶性能的影响

研究了不同环氧度的环氧化反式异戊橡胶(ETPI)对ETPI/NR并用胶力学性能、动态性能和H抽出性能的影响。结果表明,选用ETPI为15份、ETPI环氧度为5%～10%时,硫化胶在保持原胶力学性能和动态性能的基础上,可显著改善胶料的耐磨性和H抽出性能,是一种较为理想的全钢子午线轮胎带束层胶和胎体帘布胶配合。     

NR/ENR并用胶的性能研究

探讨NR/环氧化天然橡胶（ENR）并用比对NR/ENR并用胶性能的影响。结果表明,NR/ENR并用胶为部分相容体系；并用胶硫化特性和物理性能与NR基本一致,耐热空气老化性能和动态压缩疲劳性能有所下降；当ENR用量较小（10份）时,并用胶抗湿滑性能提高,同时滚动阻力降低。     

ETPI改性PVC性能的研究

研究了反式-1,4-聚异戊二烯(TPI)及环氧化反式-1,4-聚异戊二烯(ETPI)对聚氯乙烯(PVC)性能的影响,并与丁腈橡胶、粉末丁腈橡胶、氯化聚乙烯改性PVC做了比较。结果表明:不同环氧度的ETPI均对PVC有明显的增韧作用;与丁腈橡胶、粉末丁腈橡胶、氯化聚乙烯相比,环氧基摩尔分数为25%的ETPI对PVC的增韧效果最显著。     

环氧化反式1，4-聚异戊二烯在轮胎中的应用

研究环氧化反式1，4-聚异戊二烯(ETPI)在轮胎锦纶帘布层胶和钢丝带束层胶中的应用。结果表明，在锦纶帘布层胶中使用15份ETPI-15等量替代NR，在钢丝带束层胶中使用5份ETPI-25等量替代NR，硫化胶的综合性能良好，特别是与帘线的粘合性能优异。     

预处理法合成环氧化反式-1,4-聚异戊二烯及其结构与性能

采用预处理法对反式-1,4-聚异戊二烯(TPI)进行环氧化改性,合成了具有不同环氧度的环氧化TPI( ETPI),考察了预处理剂/水(体积比,下同)、投料比[过氧乙酸/TPI(摩尔比,下同)]对ETPI环氧度的影响,并对ETPI的结构及性能进行了表征.结果表明,预处理法合成的ETPI其环氧度显著提高,当预处理剂/水为7...     

NR/NdBR并用胶性能研究

研究NR/钕系BR(NdBR)并用比对NR/NdBR并用胶性能的影响。结果表明,NR/NdBR并用比对并用胶加工性能和硫化特性影响不大;随着NR/NdBR并用比的增大,并用胶拉伸性能提高,耐屈挠性能下降,生热增大;当NR/NdBR并用比为45/55～60/40时,并用胶的综合物理性能较好。     

溴化丁基橡胶对天然橡胶基并用胶性能的影响

以溴化丁基橡胶（BIIR）等量替代天然橡胶（NR）和顺丁橡胶（BR）,分别制备NR/BIIR和NR/BR/BIIR并用胶,研究并用胶的物理性能、耐热空气老化性能和动态力学性能的变化。结果表明：与NR胶料和NR/BR并用胶分别相比,NR/BIIR和NR/BR/BIIR并用胶的物理性能略有下降,耐热空气老化性能大幅度提升,抗湿滑性能提高、滚动阻力变化不大;当BIIR用量分别为10和15份时,NR/BIIR和NR/BR/BIIR并用胶的耐热空气老化性能较好。     

溴化丁基橡胶对天然橡胶基并用胶性能的影响

以溴化丁基橡胶(BIIR)等量替代天然橡胶(NR)和顺丁橡胶(BR),分别制备NR/BIIR和NR/BR/BIIR并用胶,研究并用胶的物理性能、耐热空气老化性能和动态力学性能的变化。结果表明:与NR胶料和NR/BR并用胶分别相比,NR/BIIR和NR/BR/BIIR并用胶的物理性能略有下降,耐热空气老化性能大幅度提升,抗湿滑性能提高、滚动阻力变化不大;当BIIR用量分别为10和15份时,NR/BIIR和NR/BR/BIIR并用胶的耐热空气老化性能较好。     

空气弹簧用氯丁橡胶/天然橡胶并用胶的性能研究

研究空气弹簧用氯丁橡胶（CR）/天然橡胶（NR）并用胶的性能。结果表明：当CR/NR并用比为75/25时,并用胶的耐臭氧性能和耐低温性能优异,综合物理性能好;将CR和NR分别混炼制成母炼胶后再共混,并用胶的加工性能和力学性能更好。     

环氧化天然橡胶对白炭黑/天然橡胶硫化胶物理性能和减震性能的影响

研究不同环氧度环氧化天然橡胶(ENR)对白炭黑/天然橡胶(NR)硫化胶物理性能、减震性能及压缩疲劳生热性能的影响。结果表明:ENR可以提高白炭黑/NR硫化胶的物理性能和实用温度范围内的阻尼性能,降低硫化胶的压缩疲劳生热,其中环氧度为40%的ENR效果最优。     

天然橡胶/顺丁橡胶/1，2-聚丁二烯橡胶并用胶的性能研究

研究天然橡胶(NR)/顺丁橡胶(BR)/1,2-聚丁二烯橡胶(1,2-PBR)并用胶的硫化特性、物理性能及动态力学性能,确定适用于轮胎胎面胶的BR/1,2-PBR最佳并用比。结果表明:与NR或BR相比,1,2-PBR加工性能稍差。当BR/1,2-PBR并用比为25/5时,NR/BR/1,2-PBR并用胶的综合物理性能和抗湿滑性能较好;当BR/1,2-PBR并用比为15/15时,并用胶的压缩温升低,压缩永久变形最小,综合力学性能优异,更适合应用于轮胎胎面。     

环氧化天然橡胶共交联改性EPDM/NR共混物的性能

将三元乙丙橡胶(EPDM)与环氧化天然橡胶(ENR)共交联改性后,再与天然橡胶(NR)共混,考察了ENR共交联改性EPDM/NR共混胶的硫化特性、硫化胶的物理机械性能、溶胀指数和耐热空气老化性能,并对该硫化胶进行了差示扫描量热分析。结果表明,EPDM经过ENR共交联改性后与NR共混,ENR共交联改性EPDM/NR共混胶的交联程度明显提高,各相达到了同步交联,硫化胶的综合性能得到了显著改善。     

PROPERTIES OF POLYPROPYLENE/NATURAL RUBBER/RECYCLE RUBBER POWDER BLENDS

Thermoplastic elastomers have been prepared by blending polypropylene (PP), natural rubber (NR), and recycle rubber powder (RRP). The blends were melt-mixed using a Brabender Plasticorder torque rheometer at 190°C and 50 rpm. A fixed 70:30 blend ratio (wt%) of PP and rubber was prepared. The effect of partial replacement of NR with RRP at a fixed rubber content (NR+RRP), 30 wt% on mechanical properties, swelling behavior, torque development, and morphological properties of PP/NR/RRP blends was studied. Results show that the tensile strength, Young's modulus, and swelling resistance increase with increasing RRP content in the PP/NR/RRP blends whereas the stabilization torque and elongation at break exhibit opposite trend.     

NBR／CSM并用比对共混胶耐热耐油性能的影响

研究了NBR／CSM并用比对共混胶硫化性能、力学性能、耐热老化性能和耐油性能的影响,并采用了扫描电镜分析方法表征共混胶浸油前后的结构。结果表明,随NBR用量的增加,共混胶的硫化效率提高,加工安全性能增强,耐油性能有所上升,但其耐热性能有所下降。当NBR／CSM并用比为60／40时,通过力学性能可知,共混胶中两相结构发生相反转。综合其性能,当NBR／CSM并用比为60／40时,共混胶具有最佳的耐热耐油性能,浸油后的抗拉强度保持率达到69％,断裂伸长率保持率达到86％,质量变化率为lO％,体积变化率为15％。     

HNBR/CR并用比对共混胶性能的影响

探讨了HNBR/CR并用比对共混胶加工性能、力学性能、耐热老化性能和耐油性能的影响。结果表明,随CR用量的增加,共混胶的硫化效率提高,加工性能逐渐改善,动态生热量降低,力学强度和耐油性能都有所下降。当HNBR/CR并用比大于70/30时,共混胶的拉伸强度和热空气老化后的性能保持率依然较高,且耐油性能优良,可满足一些耐油、耐热场合对胶料的基本性能要求。当并用比小于60/40时,共混胶的力学性能、耐油性能和耐热老化性能下降较为严重。     

稀土异戊橡胶与天然橡胶并用研究

进行了稀土异戊橡胶（IR）与天然橡胶（NR）的并用研究,考察了IR／NR并用胶的混炼胶硫化特性、硫化胶物理机械性能和动态性能,并与NR进行了对比。结果表明：吉林石化公司开发的IR是一种综合性能优异的新型合成橡胶,在NR中并用40份IR,不仅能够延长焦烧时间,提高操作安全性,而且还能够改善NR的耐老化性、压缩生热性能和耐动态切割性。     

Vulcanizates of epoxidized trans-polyisoprene: morphology,mechanical and dynamic properties

Morphology, curing characteristics, mechanical and dynamic properties of vulcanization of epoxidized trans-polyisoprene (ETPI) with different epoxy content were investigated. From scanning electron microscopy micrographs, it is observed that ETPI vulcanizates were a two-phase system. DSC shows that the residual crystallization reduced with increasing epoxy content. With increasing epoxy content, the induction period of cure shortened gradually as well as tensile strength, elongation at break, hardness and tear strength decreased. It is important to note that the wear resistance increased gradually with the increasing of epoxy content. Rebound values at 23 and 70 °C decreased which indicate that damping capacity and wet resistance performance increased, but the rolling resistance increased. DMA tests further show that wet resistance performance enhanced, damping capacity improved, but rolling resistance increased with increasing epoxy content of ETPI.     

Influences of the phenolic curative content and blend proportions on the properties of dynamically vulcanized natural rubber/acrylonitrile–butadiene–styrene blends

The vulcanization of natural rubber (NR)‐blended acrylonitrile–butadiene–styrene (ABS) was carried out with a phenolic curing agent by a melt‐mixing process. The NR compound was first prepared before blending with ABS. The effects of the phenolic curative contents (10, 15, and 20 phr) and blend proportions (NR/ABS ratio = 50 : 50, 60 : 40, and 70 : 30) on the mechanical, dynamic, thermal, and morphological properties of the vulcanized NR/ABS blends were investigated. The tensile strength and hardness of the blends increased with increasing ABS content, whereas the elongation at break decreased. The strength property resulting from the thermoplastic component and the vulcanized NR was an essential component for improving the elasticity of the blends. These blends showed a greater elastic response than the neat ABS. The thermal stability of the blends increased with increasing ABS component. Scanning electron micrographs of the blends showed a two‐phase morphology system. The vulcanized 60 : 40 NR/ABS blend with 15‐phr phenolic resin showed a uniform styrene‐co‐acrylonitrile phase dispersed in the vulcanized NR phase; it provided better dispersion between the NR and ABS phases, and this resulted in superior elastic properties. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42520.     

用于全钢子午线轮胎胎侧胶的反式-1,4-聚异戊二烯/天然橡胶/顺丁橡胶并用胶的性能

研究了不同反式-1,4-聚异戊二烯(TPI)用量对用于全钢子午线轮胎胎侧胶的TPI/天然橡胶(NR)/顺丁橡胶(BR)并用胶力学性能、动态力学性能和热老化性能的影响,并对并用胶进行了配方优化。结果表明,当TPI/NR/BR的并用比(质量比)为15.0/42.5/42.5时,混炼胶外表光滑,硬度适中;TPI/NR/BR并用胶的硫化特性与NR/BR并用胶相比变化不大,且在保持后者力学性能的基础上,动态力学性能明显提高;经配方优化后,并用胶耐屈挠性优异,滚动阻力、压缩生热降低,是一种较为理想的全钢子午线轮胎胎侧胶材料。