Influences of Polypropylene on Phase II-I Transformation of Polybutene-1

YAN Xiang-jie; MA Ya-ping; ZHAO Yuan-jin; LIU Chen-guang; HE Ai-hua

doi:10.14028/j.cnki.1003-3726.2024.23.255

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Influences of Polypropylene on Phase II-I Transformation of Polybutene-1

更新时间：2024-02-06

- Influences of Polypropylene on Phase II-I Transformation of Polybutene-1
  增强出版
- Polymer Bulletin Vol. 37, Issue 3, Pages: 368-376(2024)
- 作者机构：
  
  山东省烯烃催化与聚合重点实验室橡塑材料与工程教育部重点实验室青岛科技大学高分子科学与工程学院，青岛 266042
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2024.23.255
  CLC：
- Received：20 July 2023，
  
  Accepted：06 September 2023，
  
  Published：20 March 2024
- 稿件说明：
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闫相杰, 马亚萍, 赵远进, 刘晨光, 贺爱华. 聚丙烯对聚丁烯-1晶型II-I转变的影响. 高分子通报, 2024, 37(3), 368–376

Yan, X. J.; Ma, Y. P.; Zhao, Y. J.; Liu, C. G.; He, A. H. Influences of polypropylene on phase II-I transformation of polybutene-1. Polym. Bull. (in Chinese), 2024, 37(3), 368–376
闫相杰, 马亚萍, 赵远进, 刘晨光, 贺爱华. 聚丙烯对聚丁烯-1晶型II-I转变的影响. 高分子通报, 2024, 37(3), 368–376 DOI： 10.14028/j.cnki.1003-3726.2024.23.255.

Yan, X. J.; Ma, Y. P.; Zhao, Y. J.; Liu, C. G.; He, A. H. Influences of polypropylene on phase II-I transformation of polybutene-1. Polym. Bull. (in Chinese), 2024, 37(3), 368–376 DOI： 10.14028/j.cnki.1003-3726.2024.23.255.

摘要

等规聚丁烯-1 (PB)晶型II-I转变与晶型调控影响着其加工成型周期及性能，因此PB晶型II-I转变一直是研究的热点。PB/等规聚丙烯(PP)共混物作为典型的结晶/结晶聚合物共混体系，其组分含量、结晶温度对其聚集态结构产生重要影响，进而影响PB的晶型转变。本文研究了PB/PP共混体系中PP组分含量对PB晶型I成核及晶型II-I转变的影响。采用广角X射线衍射仪(WAXD)、差示扫描量热仪(DSC)、小角X射线散射仪(SAXS)和偏光显微镜(POM)观察PB/PP共混物的结晶形貌及晶型II的晶体结构，原位观察不同含量的PP对PB晶型II-I转变过程的影响。研究发现，低含量PP(≤20 wt%)的加入，共混物中PB晶型I成核及晶型II-I转变速率随PP含量增加而增加；而当PP含量≥25 wt%，共混物中PB晶型I成核及晶型II-I转变速率随PP含量增加而逐渐降低。当PP含量为20 wt%时，PB/PP共混物中PB晶型I成核最多，晶型II-I转变最快，晶型I结晶度最高。进一步探讨了PB/PP共混物中PP的含量对PB晶型II-I转变影响的内在机制。

Abstract

Crystal-crystal II-I transformation and crystal form regulation of isotactic polybutene-1 (PB) determined its molding period and properties. Study on crystal-crystal II-I transformation of PB has always been the research hot issue. As the typical crystalline/crystalline polymer blends

the aggregation structures and thus the crystal-crystal transformation of PB in the PB/polypropylene (PP) blends are influenced greatly by PP content and crystallization temperature. In this work

the effects of PP content on the nucleation and transformation rate of PB form I were studied. The crystallization morphology of PB/PP blends and crystal structure of PB form II were studied by wide-angle X-ray diffraction (WAXD)

differential scanning calorimetry (DSC)

small-angle X-ray scattering (SAXS) and polarizing microscopy (POM). The influence of PP content on the PB form II-I transition was

in situ

observed. It was found that the nucleation of PB form I and form II-I transition rate increased with the increase in PP content when ≤20 wt% PP was blended. While the nucleation of PB form I and form II-I transition rate decreased gradually with the increase in PP content when more than 25 wt% PP was blended. The nucleation of PB form I

PB form II-I transition rate and transition degree in PB/PP (80/20) blend reached the highest. The influencing mechanism of PP component on PB form II-I transition was discussed.

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references

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