高压处理对聚丁烯-1/聚丙烯共混物结晶结构及力学性能的影响

张效琳; 李贞印; 魏聪; 施智勇; 王亚明; 刘春太; 申长雨; 邵春光

doi:10.11777/j.issn1000-3304.2023.23140

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高压处理对聚丁烯-1/聚丙烯共混物结晶结构及力学性能的影响

研究论文 | 更新时间：2024-03-28

- 高压处理对聚丁烯-1/聚丙烯共混物结晶结构及力学性能的影响
- Effect of High Pressure on Crystallization Structure and Mechanical Properties of Polybutene-1 and Polypropylene Blends
- 高分子学报 2023年54卷第12期页码：1925-1934
- 作者机构：
  
  郑州大学橡塑模具国家工程研究中心郑州 450002
- 作者简介：
  
  E-mail：shaochg@zzu.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 52273027)
- DOI：10.11777/j.issn1000-3304.2023.23140
  中图分类号：
- 纸质出版日期：2023-12-20，
  
  网络出版日期：2023-10-27，
  
  收稿日期：2023-06-20，
  
  录用日期：2023-08-09
扫描看全文
张效琳,李贞印,魏聪等.高压处理对聚丁烯-1/聚丙烯共混物结晶结构及力学性能的影响[J].高分子学报,2023,54(12):1925-1934.

Zhang Xiao-lin,Li Zhen-yin,Wei Cong,et al.Effect of High Pressure on Crystallization Structure and Mechanical Properties of Polybutene-1 and Polypropylene Blends[J].Acta Polymerica Sinica,2023,54(12):1925-1934.
张效琳,李贞印,魏聪等.高压处理对聚丁烯-1/聚丙烯共混物结晶结构及力学性能的影响[J].高分子学报,2023,54(12):1925-1934. DOI： 10.11777/j.issn1000-3304.2023.23140.

Zhang Xiao-lin,Li Zhen-yin,Wei Cong,et al.Effect of High Pressure on Crystallization Structure and Mechanical Properties of Polybutene-1 and Polypropylene Blends[J].Acta Polymerica Sinica,2023,54(12):1925-1934. DOI： 10.11777/j.issn1000-3304.2023.23140.

摘要

利用广角X射线、示差扫描量热仪和电子扫描显微镜研究了不同压力下聚丁烯-1/聚丙烯(

PB-1/

PP)共混物的结晶情况. 结果表明，较高的压力能够有效抑制

PB-1和

PP的相分离，细化

PB-1富集区的尺寸，从而抑制

PB-1中form Ⅱ的生长，为form I'的生成争取空间；高压下产生的

PP晶能够诱导form I'成核，促进form I'的生成，且共混物中生成的form I'结构更稳定，能够在较高的压力范围内(200~500 MPa)稳定存在. 较小尺寸的

PB-1富集区、form I'相

PB-1以及

PP的形成，能够提高

PB-1/

PP共混制品的断裂强度和断裂伸长率，改善其力学性能.

Abstract

When polymer melts crystallize under high pressure

they often exhibit completely different crystallization behaviors from atmospheric crystallization. This difference is not only manifested in crystallization kinetics

but also in the crystal structure of the product. The crystallization behavior of

PB-1/

PP blends under different pressure was studied by means of wide-angle X-ray diffraction (WAXD)

differential scanning calorimeter (DSC) and scanning electron microscopy (SEM) in this study. The results showed that under higher pressure the phase separation of

PB-1 and

PP was effectively inhibited

and the size of the phase domain of

PB-1 was reduced

thus the nucleation and growth of form II in

PB-1 was inhibited

which was benefit for the formation of form I'. At the same time

PP crystal could also induce the nucleation of form I'. The synergy of high pressure and

PP could also further improve the structural stability of form I' of

PB-1

and make form I' phase stable under the high pressure range from 200 MPa to 500 MPa. In

PB-1/

PP blends

the smaller phase domain of

PB-1

the formation of form I' and

PP could improve the breaking strength and elongation at break of products

therefore improve their mechanical properties.

关键词

聚丁烯-1/聚丙烯共混物高压结晶结构稳定性力学性能

Keywords

Polybutene-1/polypropylene blendsHigh-pressure crystallizationStructural stabilityMechanical property

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