Multiple melting behavior of isotactic polypropylene and poly(propylene-co-ethylene) after stepwise isothermal crystallization
文献类型：期刊论文
| 作者 | Zhang FJ ; Gong YM ; He TB |
| 刊名 | european polymer journal
 |
| 出版日期 | 2003 |
| 卷号 | 39期号:12页码:2315-2322 |
| 关键词 | ETHYLENE/ALPHA-OLEFIN COPOLYMERS THERMAL-FRACTIONATION TECHNIQUE GAMMA-PHASE LAMELLAR CRYSTALS X-RAY MORPHOLOGY PROPYLENE POLYETHYLENE ENDOTHERMS TRANSITION |
| ISSN号 | 0014-3057 |
| 通讯作者 | zhang fj |
| 中文摘要 | the multiple melting behavior of several commercial resins of isotactic polypropylene (ipp) and random copolymer, poly(propylene-co-ethylene) (ppe), after stepwise isothermal crystallization (sic) were studied by differential scanning calorimeter and wide-angle x-ray diffraction (waxd). for ipp samples, three typical melting endotherms appeared after sic process when heating rate was lower than 10 degreesc/min. the waxd experiments proved that only alpha-form crystal was formed during sic process and no transition from alpha1- to alpha2-form occurred during heating process. heating rate dependence for each endotherm was discussed and it was concluded that there were only,two major crystals with different thermal stability. for the ppe sample, more melting endotherms appeared after stepwise isothermal crystallization. the introduction of ethylene comonomer in isotactic propylene backbone further decreased the regularity of molecular chain, and the short isotactic propylene sequences could crystallize into gamma-form crystal having a low melting temperature whereas the long sequences crystallized into alpha-form crystal having high melting temperature. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000187363300009 |
| 公开日期 | 2010-09-13 |
| 源URL | [http://202.98.16.49/handle/322003/18025]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhang FJ,Gong YM,He TB. Multiple melting behavior of isotactic polypropylene and poly(propylene-co-ethylene) after stepwise isothermal crystallization[J]. european polymer journal,2003,39(12):2315-2322. |
| APA | Zhang FJ,Gong YM,&He TB.(2003).Multiple melting behavior of isotactic polypropylene and poly(propylene-co-ethylene) after stepwise isothermal crystallization.european polymer journal,39(12),2315-2322. |
| MLA | Zhang FJ,et al."Multiple melting behavior of isotactic polypropylene and poly(propylene-co-ethylene) after stepwise isothermal crystallization".european polymer journal 39.12(2003):2315-2322. |
入库方式： OAI收割
来源：长春应用化学研究所
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