ICCAS OpenIR
Preparation of a blocked isocyanate compound and its grafting onto styrene-b-(ethylene-co-1-butene)-b-styrene triblock copolymer
Yin, Ligang1,2; Liu, Yanlong1,2; Ke, Zhuo1,2; Yin, Jinghua1
2009
Source PublicationEUROPEAN POLYMER JOURNAL
ISSN0014-3057
Volume45Issue:1Pages:191-198
AbstractThe epsilon-caprolactam was used to block the isocyanate group to enhance the storage stability of allyl (3-isocyanate-4-tolyl) carbamate. The spectra of FTIR and NMR showed that blocked allyl (3-isocyanate-4-tolyl) carbamate (BTAI) possesses two chemical functions, an 1-olefin double bond and a blocked isocyanate group. The FTIR spectrum showed BTAI could regenerate isocyanate group at elevated temperature. DSC and TG/DTA indicated the minimal dissociation temperature was about 135 degrees C and the maximal dissociation rate appeared at 226 degrees C. Then the styrene-b-(ethylene-co-1-butene)-b-styrene triblock copolymer (SEBS) was functionalized by BTAI via melt free radical grafting. The effect of temperature, monomer and initiator concentrations on the grafting degree and grafting efficiency was evaluated. The highest grafting degree was obtained at 200 degrees C. The grafting degree and grafting efficiency increased with the enhanced concentration of BTAI or initiator. The weight-average molecular weight (M(w)) increased greatly at higher initiator concentration and lower ratio of the monomer/initiator. And the molecule weight distribution (MWD) of the modified SEBS became wider than that of pure SEBS. It is obvious that shearing thinning behavior of grafted SEBS is more profound than pure SEBS. (C) 2008 Elsevier Ltd. All rights reserved.
KeywordFunctionalization Of Polymers Reactive Processing Elastomers Blocked Isocyanate
DOI10.1016/j.eurpolymj.2008.10.016
Indexed BySCI
Language英语
WOS IDWOS:000263211400022
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/67812
Collection中国科学院化学研究所
Corresponding AuthorYin, Jinghua
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Yin, Ligang,Liu, Yanlong,Ke, Zhuo,et al. Preparation of a blocked isocyanate compound and its grafting onto styrene-b-(ethylene-co-1-butene)-b-styrene triblock copolymer[J]. EUROPEAN POLYMER JOURNAL,2009,45(1):191-198.
APA Yin, Ligang,Liu, Yanlong,Ke, Zhuo,&Yin, Jinghua.(2009).Preparation of a blocked isocyanate compound and its grafting onto styrene-b-(ethylene-co-1-butene)-b-styrene triblock copolymer.EUROPEAN POLYMER JOURNAL,45(1),191-198.
MLA Yin, Ligang,et al."Preparation of a blocked isocyanate compound and its grafting onto styrene-b-(ethylene-co-1-butene)-b-styrene triblock copolymer".EUROPEAN POLYMER JOURNAL 45.1(2009):191-198.
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