Park Gayoung, Kim Yun Hee, Kim Dong Soo, Ko Young Chun
Department of Biotechnology, Chosun University, Gwangju 501-759, Korea.
J Nanosci Nanotechnol. 2010 May;10(5):3720-2. doi: 10.1166/jnn.2010.2348.
Morphology and vulcanizate properties of EPDM/SBR blends were investigated. AAHR (a mixture of aliphatic and aromatic hydrocarbon resins) was used as a compatibilizer and bis(3-triethoxysilylpropyl)tetrasulfide (TESPT) was used as a coupling agent. The vulcanizate properties and the morphological studies revealed that EPDM and SBR were incompatible, and the addition of AAHR was very effective to enhance the compatibility between EPDM and SBR. The weight percent of bound rubbers was increased with increasing SBR contents. The addition of an AAHR increased the amounts of bound rubbers, and hence the vulcanizate properties such as tear strength and fatigue resistance of the EPDM/SBR blends were improved. The dynamic mechanical analysis and the morphological studies revealed that the addition of TESPT increased the weight of bound rubbers and provided better dispersion of carbon black, resulting in good mechanical properties such as tear strength and fatigue resistance of the vulcanized EPDM/SBR blends. The smaller particle of zinc oxide (i.e., 50 nm > 100 nm > 1000 nm) yielded to the better blending properties of the polymer blend.
研究了三元乙丙橡胶（EPDM）/丁苯橡胶（SBR）共混物的形态和硫化胶性能。使用脂肪族和芳香族烃树脂的混合物（AAHR）作为增容剂，双（3-三乙氧基甲硅烷基丙基）四硫化物（TESPT）作为偶联剂。硫化胶性能和形态学研究表明，EPDM和SBR不相容，添加AAHR对提高EPDM和SBR之间的相容性非常有效。结合橡胶的重量百分比随SBR含量的增加而增加。添加AAHR增加了结合橡胶的量，因此EPDM/SBR共混物的硫化胶性能如撕裂强度和抗疲劳性得到改善。动态力学分析和形态学研究表明，添加TESPT增加了结合橡胶的重量，并使炭黑分散得更好，从而使硫化EPDM/SBR共混物具有良好的力学性能，如撕裂强度和抗疲劳性。较小粒径的氧化锌（即50nm＞100nm＞1000nm）使聚合物共混物具有更好的共混性能。
