ICCAS OpenIR
Dynamically confined crystallization in a soft lamellar space constituted by alternating polymer co-brushes
Xia, Nan1,2; Zhang, Guoliang1,2; Li, Tao1,2; Wang, Wei1,2; Zhu, Hui3; Chen, Yongming3; Deng, Guohua4
2011-09-12
Source PublicationPOLYMER
ISSN0032-3861
Volume52Issue:20Pages:4581-4589
AbstractCrystallization 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.
KeywordPolymer Brush Confined Crystallization Lamellar Morphology
DOI10.1016/j.polymer.2011.08.004
Indexed BySCI
Language英语
WOS IDWOS:000295017800022
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71996
Collection中国科学院化学研究所
Corresponding AuthorWang, Wei
Affiliation1.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
Recommended Citation
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.
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