Crystallization Behavior of Isotactic Polypropylene/<italic style="font-style: italic">β</italic>-Nucleating Agent under Controlled Pressurization Conditions

Cong Wei; Zhi-yong Shi; Hua-shen Zhang; Jian Xu; Ya-ming Wang; Chun-tai Liu; Chang-yu Shen; Chun-guang Shao

doi:10.11777/j.issn1000-3304.2024.24126

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Crystallization Behavior of Isotactic Polypropylene/β-Nucleating Agent under Controlled Pressurization Conditions

Research Article | 更新时间：2025-01-10

- Crystallization Behavior of Isotactic Polypropylene/β-Nucleating Agent under Controlled Pressurization Conditions
- Acta Polymerica Sinica Vol. 55, Issue 12, Pages: 1742-1753(2024)
- 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：
  
  Chun-guang Shao, E-mail: shaochg@zzu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2024.24126
  CLC：
- CSTR：32057.14.GFZXB.2024.7268
- Published：20 December 2024，
  
  Published Online：11 September 2024，
  
  Received：27 April 2024，
  
  Accepted：2024-05-30
- 稿件说明：
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魏聪, 施智勇, 张华珅, 徐剑, 王亚明, 刘春太, 申长雨, 邵春光. 可控增压条件下等规聚丙烯/β-成核剂的结晶行为研究. 高分子学报, 2024, 55(12), 1742-1753

Wei, C.; Shi, Z. Y.; Zhang, H. S.; Xu, J.; Wang, Y. M.; Liu, C. T.; Shen, C. Y.; Shao, C. G. Crystallization behavior of isotactic polypropylene/β-nucleating agent under controlled pressurization conditions. Acta Polymerica Sinica, 2024, 55(12), 1742-1753
魏聪, 施智勇, 张华珅, 徐剑, 王亚明, 刘春太, 申长雨, 邵春光. 可控增压条件下等规聚丙烯/β-成核剂的结晶行为研究. 高分子学报, 2024, 55(12), 1742-1753 DOI： 10.11777/j.issn1000-3304.2024.24126. CSTR： 32057.14.GFZXB.2024.7268.

Wei, C.; Shi, Z. Y.; Zhang, H. S.; Xu, J.; Wang, Y. M.; Liu, C. T.; Shen, C. Y.; Shao, C. G. Crystallization behavior of isotactic polypropylene/β-nucleating agent under controlled pressurization conditions. Acta Polymerica Sinica, 2024, 55(12), 1742-1753 DOI： 10.11777/j.issn1000-3304.2024.24126. CSTR： 32057.14.GFZXB.2024.7268.

摘要

利用广角X射线和偏光显微镜研究了等规聚丙烯/

-成核剂(

PP/TMB-5)在不同增压条件下的结晶行为. 结果表明：改变增压条件不仅能够控制TMB-5的自组装结构，改变

PP的结晶形貌，还能够制备出由不同晶相组成的

PP/TMB-5制品. 不同增压温度下，TMB-5能够自组装成针状、花状或点状结构，进而诱导

PP生成棒状、花状或点状晶；较低的增压压力下，TMB-5能够组装成尺寸较大、结构较完善的聚集体，压力越高越不利于TMB-5的自组装；增压压力较低时(100、200 MPa)，升高增压速率能够抑制TMB-5的自组装，当增压压力为500 MPa及以上时，这种抑制作用不明显；在

PP/TMB-5高压结晶过程中存在

PP、

PP的竞争生长现象，增压压力越低越有利于

PP的形成，反之有利于

PP的生成，压力为500 MPa或更高时，

PP完全消失，制备出纯的

PP/TMB-5样品.

Abstract

-Nucleating agents can not only provide a large number of nucleation sites for

PP crystallization and accelerate its crystallization

but also regulate the crystal morphology of

which in turn affects its macroscopic properties. In this study

the crystallization behavior of isotactic polypropylene/

-nucleating agent (

PP/TMB-5) under different pressurization conditions was investigated using wide-angle X-ray diffraction and polarized optical microscopy. The results show that changing the pressurization conditions can not only control the self-assembly structure of TMB-5 and change the crystalline morphology of

but also prepare

PP/TMB-5 products with different crystalline phases. At different pressurization temperatures

TMB-5 can self-assemble into needle-like

flower-like or dot-like structures

which in turn induces

PP to pro

duce rod-like

flower-like or dot-like crystals; at lower pressurization pressures

TMB-5 can be assembled into larger-sized and better-structured aggregates

and the higher the pressure

the more detrimental to the self-assembly of TMB-5; at lower pressurization pressures (100

200 MPa)

the higher pressurization rates can inhibit the self-assembly of TMB-5

and at lower pressurization pressures (100

200 MPa)

the higher pressurization rates can inhibit the self-assembly of TMB-5. When the pressurization pressure is 500 MPa and above

this inhibitory effect is not obvious; in the process of

PP/TMB-5 high-pressure crystallization

there is a competitive growth phenomenon of

PP and

and the lower the pressurization pressure

the more favorable the formation of

and vice versa for the generation of

and the higher the pressure is 500 MPa

the

PP completely disappears

and the

PP is prepared.

PP completely disappeared at a pressure of 500 MPa or higher

and pure

PP/TMB-5 samples were prepared.

关键词

等规聚丙烯/β-成核剂高压结晶结晶形貌β-成核剂自组装

Keywords

Isotactic polypropylene/β‍-nucleating agent (iPP/TMB-5)High pressure crystallizationCrystalline morphologyTMB-5 self-assembly

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⁰

Crystallization Behavior of Isotactic Polypropylene/β-Nucleating Agent under Controlled Pressurization Conditions

DOI：10.11777/j.issn1000-3304.2024.24126

摘要

Abstract

关键词

Keywords

references