Morphological,mechanical properties,and fracture behavior of bulk‐made ABS resins toughened by high‐cis polybutadiene rubber |
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Authors: | Zhisheng Yu Yang Li Yurong Wang Li Yang Ying Liu Yongtian Li Zhansheng Li Zhongfu Zhao |
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Affiliation: | 1. State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, People's Republic of China;2. Research Institute of Beijing Yanshan Petrochemical Co., Beijing 102500, People's Republic of China;3. Daqing Petrochemical Company, PetroChina, Daqing 163714, People's Republic of China |
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Abstract: | Acrylonitrile‐butadiene‐styrene (ABS) resins with various rubber contents were prepared by applying nickel catalyzed high‐cis polybutadiene rubber (BR9004) as toughening agent via bulk polymerization. The influence of rubber content and its characteristics on the morphology, mechanical properties, and fracture mechanisms of ABS resins were investigated. The relevant performance parameters were also evaluated and compared with a commercial injection grade resin (ABS‐8434). The results show that each synthesized resin generally contains some irregular microsized particles with a certain amount of subinclusions besides the analogous “sea‐island” morphology to ABS‐8434. The subinclusions considerably enhance the volume fraction of rubber phase; this leads to an increasing maximum loss tangent (tan δ) value, a decreasing storage modulus and glass transition temperature (Tg) of rubber phase. Besides, the higher grafting degree can not only produce a higher Tg of grafted copolymer but also improve the compatibility of rubber phase with matrix. Based on the performance measurements andfractography, the final product with a rubber content of 9.3% reveals ductile fracture behavior and excellent comprehensive properties far superior to ABS‐8434 due to combined shear yielding and massive crazing. POLYM. ENG. SCI., 2010. © 2009 Society of Plastics Engineers |
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