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Morphological, mechanical properties, and fracture behavior of bulk‐made ABS resins toughened by high‐ cis polybutadiene rubber
Author(s) -
Yu Zhisheng,
Li Yang,
Wang Yurong,
Yang Li,
Liu Ying,
Li Yongtian,
Li Zhansheng,
Zhao Zhongfu
Publication year - 2010
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21600
Subject(s) - materials science , polybutadiene , natural rubber , crazing , composite material , dynamic mechanical analysis , copolymer , elastomer , glass transition , volume fraction , polymer
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 ( T g ) of rubber phase. Besides, the higher grafting degree can not only produce a higher T g 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