Structural Differences Between Cold- and Melt-Crystallized Poly(trimethylene terephthalate) Samples
文献类型：期刊论文
| 作者 | Chen, Zhen; Yan, Shouke |
| 刊名 | APPLIED SPECTROSCOPY
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000315833400009 |
| 出版者 | SOC APPLIED SPECTROSCOPY |
| 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. |
入库方式： OAI收割
来源：化学研究所
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