Interplay of crystallization and liquid-liquid phase separation in polyolefin blends: A thermal history dependence study
文献类型：期刊论文
| 作者 | Shimizu, Katsumi; Wang, Howard; Matsuba, Go; Wang, Zhigang; Kim, Hongdoo; Peng, Weiqun; Han, Charles C. |
| 刊名 | POLYMER
 |
| 出版日期 | 2007-06-29 |
| 卷号 | 48期号:14页码:4226-4234 |
| 关键词 | Polyolefins Crystallization Phase Separation |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2007.05.005 |
| 英文摘要 | The kinetic interplay between crystallization and liquid-liquid phase separation (LLPS) in random copolymer blends of poly(ethylene-ran-hexene) (PEH) and poly(ethylene-ran-butene) (PEB) has been studied using optical microscopy. Morphologies of blends gone through three different thermal histories are compared: (1) single-quench (SQ), a homogeneous melt quickly cooled to isothermal crystallization temperatures (T-cry), (2) double-quench (DQ), a homogeneous melt quickly cooled to an intermediate temperature (T-lps) between binodal and equilibrium melting temperature (T-m(0)) and stored for a period of time and then cooled to T-cry, and (3) cyclic-quench (CQ), a homogeneous melt quickly cooled to T-lps and stored for a period of time, then gone through four cycles of crystallization and remelting. Comparing DQ morphologies to SQ ones, both crystal growth rate and nucleation density in the former are affected by prior LLPS. A scaling argument has been provided to partially account for the observed phenomena. In CQ, characteristic lengths of secondary features induced by crystallization depend strongly on the overall PEH composition, whereas are insensitive to temperature cycling. The contrast of large domains becomes more prominent upon cyclic crystallization and remelting. On the other hand, primary LLPS domains coarsen with CQ while loosing the contrast. (c) 2007 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000247855300038 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/60635]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Shimizu, Katsumi |
| 作者单位 | 1.RIKEN Harima Inst, Adv Prot Crystallog Res Grp, Sayo, Hyogo 6795148, Japan 2.SUNY Binghamton, Dept Mech Engn, Binghamton, NY 13902 USA 3.Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan 4.Chinese Acad Sci, Key Lab Engn Plast, Joint Lab Polymer Sci & Mat, Inst Chem, Beijing 100080, Peoples R China 5.Kyung Hee Univ, Dept Chem, Kyonggi Do 449701, South Korea 6.George Washington Univ, Dept Phys, Washington, DC 20052 USA 7.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shimizu, Katsumi,Wang, Howard,Matsuba, Go,et al. Interplay of crystallization and liquid-liquid phase separation in polyolefin blends: A thermal history dependence study[J]. POLYMER,2007,48(14):4226-4234. |
| APA | Shimizu, Katsumi.,Wang, Howard.,Matsuba, Go.,Wang, Zhigang.,Kim, Hongdoo.,...&Han, Charles C..(2007).Interplay of crystallization and liquid-liquid phase separation in polyolefin blends: A thermal history dependence study.POLYMER,48(14),4226-4234. |
| MLA | Shimizu, Katsumi,et al."Interplay of crystallization and liquid-liquid phase separation in polyolefin blends: A thermal history dependence study".POLYMER 48.14(2007):4226-4234. |
入库方式： OAI收割
来源：化学研究所
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