Promoting Form II-Form I Phase Transition of Polybutene-1 by Constantly Alternative Annealing

Tang-Guo Liu; Xiang-Yang Li; Shui-Sheng Lu; Yong-Xing Lin; Lin Chen; Xing-You Tian

doi:10.1007/s10118-025-3359-x

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Promoting Form II-Form I Phase Transition of Polybutene-1 by Constantly Alternative Annealing

RESEARCH ARTICLE | Updated：2025-07-26

- Promoting Form II-Form I Phase Transition of Polybutene-1 by Constantly Alternative Annealing
- Chinese Journal of Polymer Science Vol. 43, Issue 8, Pages: 1395-1405(2025)
- Affiliations：
  
  a.Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
  b.University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  xiangyangli@issp.ac.cn
- Funds：
- DOI：10.1007/s10118-025-3359-x
  CLC：
- Received：17 February 2025，
  
  Revised：2025-04-09，
  
  Accepted：15 April 2025，
  
  Online First：19 June 2025，
  
  Published：01 August 2025
- Accepted：
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Liu, T. G.; Li, X. Y.; Lu, S. S.; Lin, Y. X.; Chen, L.; Tian, X. Y. Promoting form II-form I phase transition of polybutene-1 by constantly alternative annealing. Chinese J. Polym. Sci. 2025, 43, 1395–1405

Tang-Guo Liu, Xiang-Yang Li, Shui-Sheng Lu, et al. Promoting Form II-Form I Phase Transition of Polybutene-1 by Constantly Alternative Annealing[J]. Chinese Journal of Polymer Science, 2025, 43(8): 1395-1405.
Liu, T. G.; Li, X. Y.; Lu, S. S.; Lin, Y. X.; Chen, L.; Tian, X. Y. Promoting form II-form I phase transition of polybutene-1 by constantly alternative annealing. Chinese J. Polym. Sci. 2025, 43, 1395–1405 DOI： 10.1007/s10118-025-3359-x.

Tang-Guo Liu, Xiang-Yang Li, Shui-Sheng Lu, et al. Promoting Form II-Form I Phase Transition of Polybutene-1 by Constantly Alternative Annealing[J]. Chinese Journal of Polymer Science, 2025, 43(8): 1395-1405. DOI： 10.1007/s10118-025-3359-x.

摘要

This study reports a new method to promote form II to form I phase transition in polybutene-1. Alternative annealing between ice water and hot water several times can increase the content of form I significantly. Compared to classical two-step annealing

its efficiency is higher

compensating for the shortcoming of the classical method in low-molecular-weight polybutene-1.

Abstract

The slow phase transition from form II to form I has always been an important factor that restricts the processing and application of polybutene-1 (PB-1). After extensive efforts

a set of effective methods for promoting the phase transition rate in PB-1 was established by adjusting the crystallization

nucleation

and growth temperatures. Nevertheless

low-molecular-weight PB-1 (LMWPB-1) faces

challenges because this method requires a low crystallization temperature

which is difficult to achieve during extrusion processing. In this study

we attempted to increase the phase transition rate in PB-1 by changing the annealing temperature after processing rather than the crystallization temperature in the classical scheme. The results indicated that regardless of low- or high-molecular-weight PB-1

repeated annealing between 0 and 90

C could also promote form II to form I phase transition. The initial content of form I increased with the heating and cooling cycles. The half-time of the phase transition (

1/2

) was also shortened after heating/cooling. After 100 heating/cooling cycles

1/2

was reduced to one-quarter of that without annealing

which had almost the same effect as the crystallization temperature at 25 °C in promoting the phase transition. This study indicates that annealing after processing is also an important factor affecting the phase transition of PB-1

and should receive sufficient attention.

关键词

Keywords

references

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