Studies on the nature of the macromolecular condensed state of "nascent" ultra high molar mass polyethylene
文献类型：期刊论文
| 作者 | Fan, ZY; Lan, Q; Bu, HS; Wu, LH; Sun, L; Qian, RY; Chen, SX; Men, YF; Jiang, BZ |
| 刊名 | CHINESE JOURNAL OF POLYMER SCIENCE
 |
| 出版日期 | 2001 |
| 卷号 | 19期号:1页码:25-31 |
| 关键词 | Ultra High Molar Mass Polyethylene Recrystallization Remelting Annealing Nematic State |
| ISSN号 | 0256-7679 |
| 英文摘要 | Ultra high molar mass polyethylene (UHPE) powder as polymerized in a slurry process has been studied, in its nascent state, after recrystallization on rapid cooling from the melt and after hot compression molding to a film, by DSC, effect of annealing the recrystallized specimen at 120 similar to 130 degreesC, morphology by polarizing optical microscopy and small angle X-ray scattering. Based on the experimental results obtained the macromolecular condensed state of the nascent UHPE powder is a rare case of a multi-chain condensed state of non-interpenetrating chains, involving interlaced extended chain crystalline layers and relaxed parallel chain amorphous layers. On melting, a nematic rubbery state of nanometer size domain resulted. The nematic-isotropic transition temperature was judged from literature data to be at least 220 degreesC, possibly higher than 300 degreesC, the exact temperature is however not sue because of chain degradation at such high temperatures. The recrystallization process from the melt is a crystallization from a nematic rubbery state. The drop of remelting peak temperature by 10 K of the specimen recrystallized from its melt as compared to the nascent state has its origin in the decrease both of the crystalline chain stem length and of the degree of crystallinity. The remelting peak temperature could be returned close to that of the nascent state by annealing at 120 similar to 130 degreesC. |
| 语种 | 英语 |
| WOS记录号 | WOS:000166329700005 |
| 出版者 | SPRINGER-VERLAG BERLIN |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/77321]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Qian, RY |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China 2.Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China 3.China Text Acad, Beijing 100025, Peoples R China 4.Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, ZY,Lan, Q,Bu, HS,et al. Studies on the nature of the macromolecular condensed state of "nascent" ultra high molar mass polyethylene[J]. CHINESE JOURNAL OF POLYMER SCIENCE,2001,19(1):25-31. |
| APA | Fan, ZY.,Lan, Q.,Bu, HS.,Wu, LH.,Sun, L.,...&Jiang, BZ.(2001).Studies on the nature of the macromolecular condensed state of "nascent" ultra high molar mass polyethylene.CHINESE JOURNAL OF POLYMER SCIENCE,19(1),25-31. |
| MLA | Fan, ZY,et al."Studies on the nature of the macromolecular condensed state of "nascent" ultra high molar mass polyethylene".CHINESE JOURNAL OF POLYMER SCIENCE 19.1(2001):25-31. |
入库方式： OAI收割
来源：化学研究所
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