Mechanism of Polymorph Selection during Crystallization of Random Butene-1/Ethylene Copolymer

Yao-tao Wang; Pei-ru Liu; Ying Lu; Yong-feng Men

doi:10.1007/s10118-016-1802-8

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Mechanism of Polymorph Selection during Crystallization of Random Butene-1/Ethylene Copolymer

PAPERS | Updated：2021-05-12

- Mechanism of Polymorph Selection during Crystallization of Random Butene-1/Ethylene Copolymer
- Mechanism of Polymorph Selection during Crystallization of Random Butene-1/Ethylene Copolymer
- Chinese Journal of Polymer Science 2016年34卷第8期页码：1014-1020
- Affiliations：
  
  State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Changchun 130022, China
- Author bio：
  
  Yong-feng Men (门永锋), E-mail: men@ciac.ac.cn
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China(21134006);This work was financially supported by the National Natural Science Foundation of China(51525305)
- DOI：10.1007/s10118-016-1802-8
  中图分类号：
- 收稿：2016-02-28，
  
  修回：2016-3-3，
  
  录用：2016-3-3，
  
  纸质出版：2016-08
- Accepted：
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Yao-tao Wang, Pei-ru Liu, Ying Lu, 等. Mechanism of Polymorph Selection during Crystallization of Random Butene-1/Ethylene Copolymer[J]. Chinese Journal of Polymer Science, 2016,34(8):1014-1020.

Yao-tao Wang, Pei-ru Liu, Ying Lu, et al. Mechanism of Polymorph Selection during Crystallization of Random Butene-1/Ethylene Copolymer[J]. Chinese Journal of Polymer Science, 2016, 34(8): 1014-1020.
Yao-tao Wang, Pei-ru Liu, Ying Lu, 等. Mechanism of Polymorph Selection during Crystallization of Random Butene-1/Ethylene Copolymer[J]. Chinese Journal of Polymer Science, 2016,34(8):1014-1020. DOI： 10.1007/s10118-016-1802-8.

Yao-tao Wang, Pei-ru Liu, Ying Lu, et al. Mechanism of Polymorph Selection during Crystallization of Random Butene-1/Ethylene Copolymer[J]. Chinese Journal of Polymer Science, 2016, 34(8): 1014-1020. DOI： 10.1007/s10118-016-1802-8.

摘要

Abstract

Starting from an initial sample of butene-1/ethylene copolymer with stable form Ⅰ'

we examined the nucleation of different crystalline polymorphs (here metastable form Ⅱ and stable form Ⅰ') at different isothermal crystallization temperatures after being melted at different melt temperature (

melt

). When

melt

was just above the melting temperature (

) of the crystallites

self-seeding took place. There

residue crystallites served as nuclei leading to the crystallization of the same crystalline phase. When

melt

was a few degrees above the

self-seeding was disabled due to complete melting of the initial crystals. Upon crystallization

the selection of the different polymorphs in this random copolymer was found to depend on an interplay between the domain size of segregated long crystallizable sequences and the size and energy barrier of the critical nucleus of the respective crystalline forms. Our results provide a clear understanding of the polymorphs selection during crystallization of a random copolymer as well as homo-polymers under confinement.

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Keywords

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