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On compatibilization and toughening of a copolyester with a maleated thermoplastic elastomer
Yu, ZZ; Lei, M; Ou, YC; Yang, GS
2002-12-01
Source PublicationPOLYMER
ISSN0032-3861
Volume43Issue:25Pages:6993-7001
AbstractA maleated thermoplastic elastomer (TPEg) was prepared from maleic anhydride, grafting a mixture of polyethylene - octene elastomer and semi-crystalline polyolefin plastic (60/40 by weight) in a twin screw extruder. The non-grafted version (TPE) of the mixture was also prepared under the same processing conditions. The TPEg was employed to compatibilize and toughen amorphous copolyester PETG/TPE blends. The addition of the TPEg improves the compatibility between PETG and the TPE and results in fine dispersion of the TPE in the PETG matrix. At a fixed dispersed phase content of 15 wt%, a sharp brittle-ductile transition takes place, when the TPEg content in the dispersed phase increases from 20 to 30 wt%, namely, the TPEg content in the blends increases just from 3 to 4.5 wt%. After the brittle-ductile transition, the blends are maintained at super-tough level with notched impact strength more than twenty-fold higher than that of pure PETG plastic. The influence of the TPEg content on fractography of the PETG/TPE blends was also investigated. When the TPEg content in dispersed phase is below 20 wt%, the impact fracture surface shows a small area of slow crack growth region and numerous feather-like markings in fast crack growth region, indicating a brittle failure mode. While the TPEg content in the dispersed phase is above 30 wt%, the impact fracture surface exhibits drastically enlarged slow crack growth region and some parabolic markings in the fast crack growth region. Massive cavitation and extensive matrix shear yielding are predominant mechanisms of the impact energy dissipation upon impact testing. (C) 2002 Elsevier Science Ltd. All rights reserved.
KeywordCompatibilization Copolyester Polyethylene-octene Copolymer
Indexed BySCI
Language英语
WOS IDWOS:000179075700039
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79060
Collection中国科学院化学研究所
Corresponding AuthorYu, ZZ
Affiliation1.Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Ctr Adv Mat Technol, Sydney, NSW 2006, Australia
2.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, State Key Lab Engn Plast, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Yu, ZZ,Lei, M,Ou, YC,et al. On compatibilization and toughening of a copolyester with a maleated thermoplastic elastomer[J]. POLYMER,2002,43(25):6993-7001.
APA Yu, ZZ,Lei, M,Ou, YC,&Yang, GS.(2002).On compatibilization and toughening of a copolyester with a maleated thermoplastic elastomer.POLYMER,43(25),6993-7001.
MLA Yu, ZZ,et al."On compatibilization and toughening of a copolyester with a maleated thermoplastic elastomer".POLYMER 43.25(2002):6993-7001.
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