中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Dynamically confined crystallization in a soft lamellar space constituted by alternating polymer co-brushes

文献类型:期刊论文

作者Xia, Nan1,2; Zhang, Guoliang1,2; Li, Tao1,2; Wang, Wei1,2; Zhu, Hui3; Chen, Yongming3; Deng, Guohua4
刊名POLYMER
出版日期2011-09-12
卷号52期号:20页码:4581-4589
关键词Polymer Brush Confined Crystallization Lamellar Morphology
ISSN号0032-3861
DOI10.1016/j.polymer.2011.08.004
英文摘要Crystallization kinetics and behavior of PCL side chains in polymer co-brushes constituted with PCL and PEO side chains alternatively attached on poly(styrene-alt-maleimide) backbones have been determined using in-situ FT-IR and DSC methods. Avrami analysis shows the exponent n increasing from one at 10 degrees C to two at 30 degrees C, demonstrating confined crystallization of PCL side chains through homogeneous or heterogeneous nucleation. PLM morphological characterization displays typical spherulites of which size is dependent on the crystallization temperature and further AFM visualization shows typical PCL lamellae at 30 degrees C and broken lamellae at 10 degrees C embedded within PEO + backbone matrix inside of spherulites. Such lamellar structure explains the confined crystallization with Avrami exponent n <= 2. Formation of the broken lamellae can further clarify the reason why Avrami exponent decreases to n approximate to 1 at 10 degrees C, that is, homogeneous nucleation in the isolated crystals. Dynamically confined crystallization has been proposed based on their special molecular architecture. Comparing to statically confined crystallization, the construction of confined space and the crystallization process were almost synchronous. The formation of spherulites mesoscopically reveals the entire molecule motion and assembly through a pathway of conventional crystalline polymers and the crystallization of PCL side chains in a space constituted by stiff backbones of poly(styrene-alt-maleimide) plus soft PEO layer microscopically reflects a confined character which has been observed in some conventional block copolymers. (C) 2011 Elsevier Ltd. All rights reserved.
语种英语
WOS记录号WOS:000295017800022
出版者ELSEVIER SCI LTD
源URL[http://ir.iccas.ac.cn/handle/121111/71995]  
专题中国科学院化学研究所
通讯作者Wang, Wei
作者单位1.Nankai Univ, Ctr Synthet Soft Mat, Key Lab Funct Polymer Mat, Coll Chem, Tianjin 300071, Peoples R China
2.Nankai Univ, Coll Chem, Inst Polymer Chem, Tianjin 300071, Peoples R China
3.Chinese Acad Sci, Lab Polymer Phys & Chem, Inst Chem, Beijing 100190, Peoples R China
4.S China Univ Technol, Coll Chem, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714
Xia, Nan,Zhang, Guoliang,Li, Tao,et al. Dynamically confined crystallization in a soft lamellar space constituted by alternating polymer co-brushes[J]. POLYMER,2011,52(20):4581-4589.
APA Xia, Nan.,Zhang, Guoliang.,Li, Tao.,Wang, Wei.,Zhu, Hui.,...&Deng, Guohua.(2011).Dynamically confined crystallization in a soft lamellar space constituted by alternating polymer co-brushes.POLYMER,52(20),4581-4589.
MLA Xia, Nan,et al."Dynamically confined crystallization in a soft lamellar space constituted by alternating polymer co-brushes".POLYMER 52.20(2011):4581-4589.

入库方式: OAI收割

来源:化学研究所

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