Structural Differences Between Cold- and Melt-Crystallized Poly(trimethylene terephthalate) Samples

doi:10.1366/12-06858

CORC > 化学研究所 > 中国科学院化学研究所

	Structural Differences Between Cold- and Melt-Crystallized Poly(trimethylene terephthalate) Samples
	Chen, Zhen; Yan, Shouke
刊名	APPLIED SPECTROSCOPY
	2013-03-01
卷号	67 期号:3 页码:307-313
关键词	Poly(Trimethylene Terephthalate) (Ptt) Fourier Transform Infrared Spectroscopy (Ft-ir) Crystallization Structure.
ISSN号	0003-7028
DOI	10.1366/12-06858
英文摘要	Time-resolved Fourier transform infrared spectroscopy was used to investigate the structural differences between cold- and melt-crystallized poly(trimethylene terephthalate) (PTT) samples. To elucidate the arrangement of different chain segments in the crystalline phase obtained through different crystallization processes, characteristic bands associated with the phenylene rings, the CH2 segments, and the C-O-C segments were followed during the cold and the melt crystallizations. The results show that the alignment of the phenylene rings and the C=O groups in the PTT crystals produced via cold- and melt-crystallization processes are essentially the same, while the alignment of the CH2 segments depends on the crystallization condition. It was found that the CH2 segments in the melt-crystallized sample were more stable than those in the cold-crystallized sample. This was ascribed to the different crystallization environment. Melt-crystallized PTT chains have higher mobility, and the variation of flexible segments is quicker than that of the rigid segments. However, in cold crystallization, the CH2 segments are restricted by the adjacent environment in the glass state, which weakens their capability of transforming their conformation; this leads to a cooperative change of CH2 segments, phenylene rings, and C=O groups. Therefore, the stability of CH2 segments in crystalline structure is lowered accordingly.
语种	英语
出版者	SOC APPLIED SPECTROSCOPY
WOS记录号	WOS:000315833400009
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/42262]
专题	中国科学院化学研究所
通讯作者	Yan, Shouke
作者单位	Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chemistry, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Chen, Zhen,Yan, Shouke. Structural Differences Between Cold- and Melt-Crystallized Poly(trimethylene terephthalate) Samples[J]. APPLIED SPECTROSCOPY,2013,67(3):307-313.
APA	Chen, Zhen,&Yan, Shouke.(2013).Structural Differences Between Cold- and Melt-Crystallized Poly(trimethylene terephthalate) Samples.APPLIED SPECTROSCOPY,67(3),307-313.
MLA	Chen, Zhen,et al."Structural Differences Between Cold- and Melt-Crystallized Poly(trimethylene terephthalate) Samples".APPLIED SPECTROSCOPY 67.3(2013):307-313.