Evolution of phase morphology of high impact polypropylene particles upon thermal treatment
文献类型：期刊论文
| 作者 | Chen, Yong; Chen, Ye; Chen, Wei; Yang, Decai |
| 刊名 | EUROPEAN POLYMER JOURNAL
 |
| 出版日期 | 2007-07-01 |
| 卷号 | 43期号:7页码:2999-3008 |
| 关键词 | High Impact Polypropylene Phase Morphology Evolution Thermal Treatment |
| ISSN号 | 0014-3057 |
| DOI | 10.1016/j.eurpolymj.2007.04.026 |
| 英文摘要 | Solvent fractionation and differential scanning calorimetry (DSC) results show that high impact polypropylene (hiPP) produced by a multistage polymerization process consists of PP homopolymer, amorphous ethylene-propylene random copolymer (EPR), and semicrystalline ethylene-propylene copolymer. For the original hiPP particles obtained right after polymerization, direct transmission electron microscopy (TEM) observation reveals a fairly homogeneous morphology of the ethylene-propylene copolymer (EP) phase regions inside, while the polyethylene-rich interfacial layer observed between the EP region and the iPP matrix supports that EP copolymers form on the subglobule surface of the original iPP particles. Compared with that in original hiPP particles, the dispersed EP domains in pellets have much smaller average size and relatively uniform size distribution, indicating homogenization of the EP domains in the hiPP by melt-compounding. Upon heat-treatment, phase reorganization occurs in hiPP, and the dispersed EP domains can form a multiple-layered core-shell structure, comprising a polyethylene-rich core, an EPR intermediate layer and an outer shell formed by EP block copolymer, which accounts to some extent for the good toughness-rigidity balance of the material. The results indicate that to establish the optimum phase structure and desired properties for hiPP, both the architecture of original hiPP particles and subsequent melt-processing conditions should be carefully modulated. (c) 2007 Published by Elsevier Ltd. |
| 语种 | 英语 |
| WOS记录号 | WOS:000248641400025 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/61429]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yang, Decai |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, Grad Sch, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.China Petr & Chem Corp, Beijing Res Inst Chem Ind, Beijing 100013, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yong,Chen, Ye,Chen, Wei,et al. Evolution of phase morphology of high impact polypropylene particles upon thermal treatment[J]. EUROPEAN POLYMER JOURNAL,2007,43(7):2999-3008. |
| APA | Chen, Yong,Chen, Ye,Chen, Wei,&Yang, Decai.(2007).Evolution of phase morphology of high impact polypropylene particles upon thermal treatment.EUROPEAN POLYMER JOURNAL,43(7),2999-3008. |
| MLA | Chen, Yong,et al."Evolution of phase morphology of high impact polypropylene particles upon thermal treatment".EUROPEAN POLYMER JOURNAL 43.7(2007):2999-3008. |
入库方式： OAI收割
来源：化学研究所
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