The Brill transition in polyether-b-amide segmented copolymers and composition dependence

	The Brill transition in polyether-b-amide segmented copolymers and composition dependence
	Zhu, Ping ; Dong, Xia 1; Cao, Yiyu ; Wang, Lili ; Liu, Xinran ; Wang, Zefan ; Wang, Dujin
刊名	EUROPEAN POLYMER JOURNAL
	2017-08-01
卷号	93 页码:334-346
关键词	Polyether-b-amide Copolymers Brill Transition Polymorphism Waxd Ftir
英文摘要	In present work, the Brill transitions of polyamide component in polyether-b-amide (PEBA) segmented copolymers were investigated by a combination of in situ wide-angle X-ray diffraction (WAXD), Fourier transform infrared spectroscopy (FTIR) and small-angle X-ray scattering (SAXS). The lab-made, additive-free PEBA copolymers, which consist of crystalline polyamide1012 (PA1012) hard segments (HS) and amorphous poly(tetramethylene oxide) (PTMO) soft segments (SS), provide an opportunity to explore the relationship between the Brill temperature (TB) and the composition of PEBA, as well as the impact of incorporation of PTMO on the variation of the Brill transition. It was found that the TB of PA1012 component kept approximately constant during the cooling process and the second heating process for homo PA1012 and HS-dominant PA1012-PTMO copolymers. Manifested itself by the merging of two diffractions of (100) and (110)/(010), the Brill transition for each sample during the second heating occurred with a TB varying from 115 degrees C to 125 degrees C. This temperature range can be referred as a TB zone. The 11111( band at 1188 cm(-1) disappeared and FTIR bands sensitive to crystalline phase blue shifted from 939 cm(-1) to 943 cm(-1), when the temperature reached the respective TB for each sample. Based on the calculation of one-dimensional electron density correlation function, lamellae thickness in the initial states of all PA1012 and PA1012-based PEBA samples was found to be independent on the composition, which resulted in the consistent T-B.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/39218]
专题	化学研究所_工程塑料实验室
作者单位	1.Chinese Acad Sci, CAS Key Lab Engn Plast, CAS Res Educ Ctr Excellence Mol Sci, Beijing Natl Lab Mol Sci,Inst Chem, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Ping,Dong, Xia,Cao, Yiyu,et al. The Brill transition in polyether-b-amide segmented copolymers and composition dependence[J]. EUROPEAN POLYMER JOURNAL,2017,93:334-346.
APA	Zhu, Ping.,Dong, Xia.,Cao, Yiyu.,Wang, Lili.,Liu, Xinran.,...&Wang, Dujin.(2017).The Brill transition in polyether-b-amide segmented copolymers and composition dependence.EUROPEAN POLYMER JOURNAL,93,334-346.
MLA	Zhu, Ping,et al."The Brill transition in polyether-b-amide segmented copolymers and composition dependence".EUROPEAN POLYMER JOURNAL 93(2017):334-346.