Recovery of amorphous poly(ethylene terephthalate) film uniaxially drawn just below the glass transition temperature
文献类型：期刊论文
| 作者 | Sun, NJ; Yang, J; Shen, DY; Qian, RY |
| 刊名 | CHINESE JOURNAL OF POLYMER SCIENCE
 |
| 出版日期 | 2000 |
| 卷号 | 18期号:1页码:69-75 |
| 关键词 | Poly(Ethylene Terephthalate) Uniaxial Drawing Recovery Orientation |
| ISSN号 | 0256-7679 |
| 英文摘要 | Isothermal recovery in the macroscopic length of homogeneously deformed specimens of amorphous poly(ethylene terephthalate) (PET) film sample uniaxially drawn at 69 degrees C to the draw ratios lambda(0) = 1.26-2.20 were studied at temperatures around the glass transition temperature (T-g = 73 degrees C). Experimental results indicate that the length recovery look place in two distinct steps: a fast first step (fast relaxation) followed by a slow second step (slow relaxation). The relaxation processes were accompanied by the reversion of trans-conformers (1340 cm(-1)) to gauche, and the dichroic function of the 1340 cm(-1) band characterizing the segmental orientation along the chain direction decreased to a very low value at the end of the fast relaxation. This fact led us to assign the fast relaxation as the segmental orientation while the slow relaxation as relaxation of the global chain orientation. It was found that the slow relaxation follows a single exponential function, with relaxation times strongly dependent on the temperature resembling the glass transition process. The fast relaxation does not follow a single exponential decay, presumably a distribution of relaxation times is involved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000085195700011 |
| 出版者 | SPRINGER-VERLAG SINGAPORE PTE LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/76355]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Qian, RY |
| 作者单位 | Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, NJ,Yang, J,Shen, DY,et al. Recovery of amorphous poly(ethylene terephthalate) film uniaxially drawn just below the glass transition temperature[J]. CHINESE JOURNAL OF POLYMER SCIENCE,2000,18(1):69-75. |
| APA | Sun, NJ,Yang, J,Shen, DY,&Qian, RY.(2000).Recovery of amorphous poly(ethylene terephthalate) film uniaxially drawn just below the glass transition temperature.CHINESE JOURNAL OF POLYMER SCIENCE,18(1),69-75. |
| MLA | Sun, NJ,et al."Recovery of amorphous poly(ethylene terephthalate) film uniaxially drawn just below the glass transition temperature".CHINESE JOURNAL OF POLYMER SCIENCE 18.1(2000):69-75. |
入库方式： OAI收割
来源：化学研究所
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