Effect of Linear and Ring-like Co-units on the Temperature Dependence of Nucleation and Growth in II-I Phase Transition of Butene-1 Copolymers

Ya-Hui Lou; Yi-Long Liao; Li Pan; Bin Wang; Yue-Sheng Li; Zhe Ma

doi:10.1007/s10118-018-2135-6

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Effect of Linear and Ring-like Co-units on the Temperature Dependence of Nucleation and Growth in II-I Phase Transition of Butene-1 Copolymers

ARTICLE | Updated：2021-02-18

- Effect of Linear and Ring-like Co-units on the Temperature Dependence of Nucleation and Growth in II-I Phase Transition of Butene-1 Copolymers
- Effect of Linear and Ring-like Co-units on the Temperature Dependence of Nucleation and Growth in II-I Phase Transition of Butene-1 Copolymers
- Chinese Journal of Polymer Science 2018年36卷第11期页码：1269-1276
- Affiliations：
  
  Tianjin Key Laboratory of Composite and Functional Materials and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
- Author bio：
  
  zhe.ma@tju.edu.cn
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 51573132 and 51633009), and Tianjin Natural Science Foundation (No. 16JCQNJC02700).
- DOI：10.1007/s10118-018-2135-6
  中图分类号：
- 收稿：2018-02-10，
  
  修回：2018-3-17，
  
  录用：2018-3-19，
  
  网络首发：2018-04-20，
  
  纸质出版：2018-11
- Accepted：
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Citation: Lou, Y. H.; Liao, Y. L.; Pan, L.; Wang, B.; Li, Y. S.; Ma, Z. Effect of Linear and Ring-like Co-units on the Temperature Dependence of Nucleation and Growth in II-I Phase Transition of Butene-1 Copolymers. Chinese J. Polym. Sci. 2018, 36(11), 1269–1276.

Ya-Hui Lou, Yi-Long Liao, Li Pan, et al. Effect of Linear and Ring-like Co-units on the Temperature Dependence of Nucleation and Growth in II-I Phase Transition of Butene-1 Copolymers[J]. Chinese Journal of Polymer Science, 2018, 36(11): 1269-1276.
Citation: Lou, Y. H.; Liao, Y. L.; Pan, L.; Wang, B.; Li, Y. S.; Ma, Z. Effect of Linear and Ring-like Co-units on the Temperature Dependence of Nucleation and Growth in II-I Phase Transition of Butene-1 Copolymers. Chinese J. Polym. Sci. 2018, 36(11), 1269–1276. DOI： 10.1007/s10118-018-2135-6.

Ya-Hui Lou, Yi-Long Liao, Li Pan, et al. Effect of Linear and Ring-like Co-units on the Temperature Dependence of Nucleation and Growth in II-I Phase Transition of Butene-1 Copolymers[J]. Chinese Journal of Polymer Science, 2018, 36(11): 1269-1276. DOI： 10.1007/s10118-018-2135-6.

摘要

Abstract

The phase transition from tetragonal form II to hexagonal form I was studied for the butene-1/ethylene and butene-1/1

5-hexadiene random copolymers

which have comparable molecular weight but distinct linear ethylene and ringlike methylene-1

3-cyclopentane (MCP) structural co-units

respectively. It is known that this solid phase transition follows the nucleation-growth mechanism

so the stepwise annealing protocol was utilized to investigate the influences of co-units on the optimal nucleation and growth temperatures. Compared with optimal nucleation and growth temperatures of −10 and 35 °C

respectively

in polybutene-1 homopolymer

two butene-1/ethylene copolymers with 1.5 mol% and 4.3 mol% co-units have the slightly lower optimal nucleation temperature of −15 °C but much higher optimal growth temperature of 50 °C. Clearly

the effect of ethylene co-unit is more significant on varying optimal temperature for growth than for nucleation. Furthermore

when the incorporated co-unit is ringlike MCP

the optimal nucleation temperature is −15 °C for 2.15 mol% co-units

the same with above BE copolymers

but −13 °C for a very low concentration of 0.65 mol%. Interestingly

the optimal growth temperature of butene-1/1

5-hexadiene copolymers with 0.65 mol%−2.15 mol% MCP co-units increases to 55 °C

which is also independent on co-unit concentration. These obtained values of optimal temperatures provide crucial parameters for rapid II-I phase transition.

关键词

Keywords

references

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