白炭黑补强天然橡胶/高反式-1，4-丁二烯-异戊二烯共聚橡胶并用胶性能的研究

以天然橡胶(NR)/高反式-1,4-丁二烯-异戊二烯共聚橡胶(TBIR)并用胶为对比,研究白炭黑补强NR/TBIR并用胶的性能。结果表明:NR/TBIR混炼胶和白炭黑补强NR/TBIR混炼胶的强度分别较NR混炼胶和白炭黑补强NR混炼胶提高;随着TBIR用量增大,NR/TBIR硫化胶和白炭黑补强NR/TBIR硫化胶的压缩永久变形和DIN磨耗量分别较NR硫化胶和白炭黑补强NR硫化胶减小,耐屈挠疲劳性能和耐伸张疲劳性能大幅提高,静摩擦因数和动摩擦因数增大;白炭黑补强NR/TBIR硫化胶较白炭黑补强NR硫化胶的白炭黑聚集体平均粒径减小,白炭黑在橡胶基体中的分散性改善。     

反式丁戊橡胶在不同模量天然橡胶动态制品中的应用

研究了反式丁戊橡胶(TBIR)在不同模量天然橡胶(NR)动态制品中的应用.结果表明,在低模量、中模量和高模量的NR动态制品中并用10份TBIR,硫化胶的拉伸性能(包括定伸应力、拉断伸长率和拉伸强度)和撕裂性能均基本保持不变,硫化胶的一级屈挠疲劳性能分别提升100％、47％和31％,六级屈挠疲劳寿命分别提升69％、75％...     

天然橡胶/丁苯橡胶/反式丁戊橡胶并用胶的性能研究

研究反式丁戊橡胶（TBIR）对天然橡胶（NR）/丁苯橡胶（SBR）并用胶性能的影响。结果表明：用15份TBIR替代NR,NR/SBR/TBIR并用胶的NR与SBR相容性改善,拉伸强度和定伸应力略有降低,耐磨性能、耐压缩疲劳性能和耐屈挠疲劳性能提高;用15份TBIR替代SBR,NR/SBR/TBIR并用胶的NR与SBR相容性明显改善,拉伸性能变化不大,耐磨性能、耐压缩疲劳性能和耐屈挠疲劳性能提高;用15份TBIR替代NR/SBR并用胶,NR/SBR/TBIR并用胶的大部分性能介于TBIR单独替代NR与SBR并用胶的性能之间,抗湿滑性能提高,滚动阻力降低;在NR/SBR并用胶中直接加入6份TBIR,NR/SBR/TBIR并用胶的NR与SBR相容性改善,耐磨性能、耐压缩疲劳性能和耐屈挠疲劳性能提高,抗湿滑性能和滚动阻力降低。     

硫化条件对天然橡胶/反式丁戊橡胶并用胶应用性能的影响

研究了硫化温度和硫化时间对天然橡胶(NR)和NR/反式丁戊橡胶(TBIR)并用胶应用性能的影响。结果表明,在相同的硫化温度下,NR与NR/TBIR并用胶的焦烧时间、工艺正硫化时间和交联密度几乎一致。对比140℃、150℃和160℃硫化温度下NR和NR/TBIR硫化胶的性能,NR/TBIR并用胶在160℃下硫化时磨耗性能和滚动阻力优势最大,150℃硫化时疲劳性能优势最大。对比160℃下的硫化时间,发现其变化不会明显影响TBIR在NR体系中的磨耗性能、滚动阻力和疲劳性能优势的发挥。     

氧化锌在橡胶动态疲劳破坏历程中的作用机理

研究了氧化锌(ZnO)在天然橡胶(NR)动态疲劳破坏历程中的作用机理。结果表明,当ZnO用量为3.0~5.0份时,NR硫化胶的伸张疲劳性能最佳。ZnO用量为5.0份时,消除了硫化返原现象,NR硫化胶的综合性能较佳。随着ZnO用量的增加,NR硫化胶压缩疲劳生热呈现降低的趋势。屈挠疲劳裂口随着屈挠次数的增加而增大,当ZnO用量超过5.0份以后,相同屈挠程度下的NR硫化胶疲劳裂口长度随ZnO用量不同的变化较小。     

NR/TPI并用比例对轨道隔振垫阻尼层性能的影响

研究天然橡胶（NR）/反式1,4-聚异戊二烯（TPI）并用比对轨道隔震垫阻尼层性能的影响。结果表明：随TPI用量的增大,胶料的t90增大,硫化时间延长;硫化胶的压缩疲劳温升和压缩永久变形减小,静刚度逐渐增大。当NR/TPI并用比为95/5时,硫化胶在保持物理性能和耐老化性能的基础上提高了屈挠疲劳寿命,且对降低隔震垫的疲劳静刚度损失率效果最佳。     

液体聚异戊二烯对天然橡胶/聚丁二烯橡胶硫化胶微观结构和性能的影响

研究了液体聚异戊二烯(LIR)作为增塑剂对天然橡胶(NR)/聚丁二烯橡胶(BR)硫化胶微观结构、弯曲疲劳性能、压缩疲劳性能和动态力学性能的影响,并与加入工业用增塑剂芳烃油的硫化胶进行了对比。结果表明,加入LIR较芳烃油有利于炭黑在NR/BR体系中的分散;随着LIR用量的增加,NR/BR硫化胶的耐屈挠疲劳性能基本不变;与芳烃油增塑的NR/BR体系相比,LIR增塑NR/BR体系的耐屈挠疲劳性能较优,压缩疲劳生热和压缩永久变形较低;加入LIR降低了硫化胶滚动阻力的同时减弱了其抗湿滑性。     

反式丁戊橡胶TBIR2249在减震领域中的应用

研究了反式丁戊橡胶TBIR2249在减震领域中的应用。结果表明,以恒黏标准胶SMR CV60和恒黏标准胶SMR CV60/稀土顺丁橡胶CB22(80/20)并用胶为对比,并用10～20份TBIR2249后,150℃下的硫化特性参数变化不大,硫化胶的拉伸强度、定伸应力、拉断伸长率和回弹性能等均保持在较高水平,六级屈挠疲劳性能显著提升,反式丁戊橡胶TBIR2249可用于提升减震制品的服役寿命。     

TPI在橡胶减震制品中的机械及动态性能研究

主要研究了天然橡胶(NR)/反式聚异戊二烯橡胶(TPI)体系中,不同用量TPI及不同门尼黏度TPI对减震配方硫化胶机械性能及动态性能的影响。结果表明,NR/TPI硫化胶耐屈挠疲劳性能均优于纯NR配方,并用15份TPI-80的配方6级屈挠达到122万次,增长率为226%;NR/TPI硫化胶伸张疲劳寿命均优于纯NR配方,伸张疲劳永久变形均小于纯NR配方,并用15份TPI-100的配方伸张疲劳寿命达到30.38万次,增长率为65%。     

天然橡胶/反式1，4-聚异戊二烯并用比对轨道隔震垫阻尼层胶料性能的影响

研究天然橡胶(NR)/反式1,4-聚异戊二烯(TPI)并用比对轨道隔震垫阻尼层性能的影响。结果表明:随TPI用量的增大,胶料的t_(90)增大,硫化时间延长;硫化胶的压缩疲劳温升和压缩永久变形减小,静刚度逐渐增大。当NR/TPI并用比为95/5时,硫化胶在保持物理性能和耐老化性能的基础上提高了屈挠疲劳寿命,且对降低隔震垫的疲劳静刚度损失率效果最佳。     

反式聚辛烯橡胶改性天然橡胶/顺丁橡胶共混胶的性能

研究了反式聚辛烯橡胶(TOR)改性天然橡胶(NR)/顺丁橡胶(BR)(二者质量比80/20)共混胶的性能.结果表明,采用5～15份(质量,下同)TOR改性NR/BR混炼胶的门尼黏度逐渐降低、Payne效应基本不变,共混胶的焦烧时间和工艺正硫化时间延长、硫化速率减慢.相比NR/BR硫化胶,NR/BR/TOR硫化胶的拉伸强...     

杜仲橡胶在汽车扭力梁铰接的应用研究

研究杜仲橡胶(TPI)与天然橡胶（NR）共混硫化胶性能及其在汽车减震制品扭力梁铰接中的应用。结果表明,在原天然橡胶体系中并用少量杜仲橡胶,可以在保持原胶料物理性能基本不变的情况下,大幅提高天然橡胶的伸张疲劳性能、耐屈挠性能和动态力学性能,并且能够显著改善汽车扭力梁铰接的耐疲劳性能,在汽车减震橡胶件的应用前景令人期待。     

高抗疲劳性轿车轮胎胎侧胶的配方设计与性能研究

研究反式-1,4-丁二烯-异戊二烯共聚橡胶(TBIR)的结晶性能、加工性能以及NR/BR/TBIR并用胶在轿车轮胎胎侧胶中的应用。结果表明:相比反式-1,4-聚异戊二烯(TPI),TBIR的结晶性能微弱、玻璃化温度更低;相比天然橡胶(NR)和顺丁橡胶(BR),TBIR具有优异的加工性能;相比NR,BR和TPI,TBIR的耐老化性能优异;相比NR/BR和NR/BR/TPI并用胶,NR/BR/TBIR(并用比为45/35/20)并用胶的物理性能优异,生热降低,耐裂口扩展性能显著提高。TBIR作为一种新型合成橡胶材料可应用于高耐疲劳轿车轮胎。     

Cure characteristics and mechanical properties of hydrogenated natural rubber/natural rubber blends

The cure characteristics and mechanical properties of blends consisting of hydrogenated natural rubber (HNR) and natural rubber (NR) blends were investigated. The HNR/NR blends at 50/50 wt ratio were vulcanized using various cure systems: peroxide vulcanization, conventional vulcanization with peroxide, and efficient vulcanization with peroxide. The HNR/NR vulcanizates cured by the combination of peroxide and sulfur donor (tetramethylthiuram disulfide, TMTD) in the efficient vulcanization with peroxide exhibited the best mechanical properties. It was also found that the hydrogenation level of HNR did not affect the tensile strength of the vulcanizates. The tensile strength of the blends decreased with increasing HNR content because of the higher incompatibility to cause the noncoherency behavior between NR and HNR. However, the HNR/NR vulcanizate at 50/50 wt ratio showed the maximum ultimate elongation corresponding to a co‐continuous morphology as attested to by scanning electron micrographs. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

炭黑在天然橡胶/溶聚丁苯橡胶硫化胶中的分散及其对性能的影响

考察了溶聚丁苯橡胶(SSBR)用量、炭黑的种类及用量对天然橡胶(NR)/SSBR硫化胶动态力学性能和力学性能的影响.结果表明,炭黑与SSBR的结合作用比与NR弱;随SSBR用量的增加,炭黑在NR/SSBR共混硫化胶中的分散性提高,Payne效应减弱,频率敏感性增强;随SSBR用量的增加,NR/SSBR共混硫化胶的拉伸强度和撕裂强度减小,扯断伸长率变化不大;而定伸应力则呈先减小后增大的趋势;随不同种类的炭黑在NR/SSBR硫化胶中分散性的提高,定伸应力呈上升趋势,损耗因子和压缩生热呈减小趋势.     

NR/EPDM 的共硫化

利用环氧化天然橡胶(ENR)与天然橡胶(NR)和三元乙丙橡胶(EPDM)均有很好相容性的特点，采用硫化促进剂预混工艺对NR／EPDM并用胶实施共硫化。考察了其对NR／EPDM并用胶的硫化特性、硫化胶的物理机械性能和耐热空气老化性能的影响。结果表明：本工艺确实能改善NR／EPDM的共硫化性能，所得硫化胶物理性能较好且操作简单。     

Properties of natural rubber vulcanizates containing mechanochemically devulcanized ground tire rubber

The devulcanization of ground tire rubber (GTR) was carried out with a self-designed pan-mill type mechanochemical reactor. Gel fraction and crosslink density measurements confirmed the occurrence of stress induced mechanochemical devulcanization of GTR. The partially devulcanized GTR (dGTR) was blended with virgin natural rubber (NR) at different ratios. The curing characteristics and mechanical properties of these composites were investigated and compared with those composites of raw ground tire rubber (rGTR) and NR. The results showed that the tensile properties of the dGTR/NR vulcanizates were much better than those of the rGTR/NR vulcanizates, which are comparable to or even better than the virgin vulcanizate, indicating the significant benefit of mechanochemical devulcanization. At the GTR content of 10%, the tensile strength of the dGTR/NR blends increased to 23.2 MPa from 13.7 MPa of the rGTR/NR blends, enhanced by 69% through partial devulcanization of GTR, and the elongation at break increased by 47%.     

液体聚丁二烯橡胶对顺丁橡胶/天然橡胶共混胶加工性能及抗疲劳性能的影响

考察了液体聚丁二烯橡胶Activ-50对顺丁橡胶(BR)/天然橡胶(NR)共混胶加工性能及抗疲劳性能的影响,并采用裂纹增长测试平台结合有限元ABAQUS/CAE,从疲劳裂纹扩展角度对硫化胶的抗疲劳性能进行了考察.结果表明,Activ-50能够降低混炼胶的储能模量和黏度,橡胶共混过程中加入Activ-50能改善体系的加工...     

Development of novel elastomeric blends containing natural rubber and ultra-low-density polyethylene

This study sought to develop novel elastomeric compounds using natural rubber (NR) and ultra-low-density polyethylene (ULDPE). Blends were prepared by means of a two-roll mill for three ratios (70/30, 60/40, and 50/50 NR/ULDPE). Conventional vulcanization was performed in a compression mold. The physical and mechanical properties of the blend were determined according to ASTM standards. The results were compared with those obtained from NR blended with styrene-butadiene rubber (SBR). The morphological examinations with scanning electron microscopy indicated that ULDPE was compatible with NR; thus, the addition of a compatibilizer was not necessary. The cocontinuous phase was dominant in the NR/ULDPE blend containing 50 and 60 wt % NR. The tensile properties, tear resistance, and aging resistance of the NR/ULDPE blends were found to be superior to those of NR/SBR blends. On the other hand, the abrasion and flex cracking resistances of the NR/ULDPE blend were inferior to those exhibited by SBR blends but the Mooney viscosity and resilience of both blends fell in the same range. However, the addition of dicumyl peroxide appeared to have caused crosslinking of the ULDPE phase in the blend, which in turn increased the tensile properties and abrasion and aging resistance. The properties of the tertiary NR/SBR/ULDPE blend were investigated as well. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 650–660, 2001