The Effect of Lamellar Thickness of <italic style="font-style: italic">i</italic>PP on the Formation of Trigonal Modification of PB-1 under Confinement Environment

Ze-fan Wang; Qian-hong Jiang; Qian Xing; Du-jin Wang

doi:10.11777/j.issn1000-3304.2021.21370

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The Effect of Lamellar Thickness of iPP on the Formation of Trigonal Modification of PB-1 under Confinement Environment

Research Article | 更新时间：2024-10-08

- The Effect of Lamellar Thickness of iPP on the Formation of Trigonal Modification of PB-1 under Confinement Environment
- ACTA POLYMERICA SINICA Vol. 53, Issue 5, Pages: 514-521(2022)
- 作者机构：
  
  1.深圳先进电子材料国际创新研究院中国科学院深圳先进技术研究院深圳 518100
  2.中国科学院化学研究所北京 100190
  3.北京自动化控制设备研究所北京 100071
  4.北京工商大学化学与材料工程学院北京 100048
- 作者简介：
  
  Ze-fan Wang, E-mail: zfwang@iccas.ac.cn
  Qian Xing, E-mail: xingqian@btbu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2021.21370
  CLC：
- Published：20 May 2022，
  
  Published Online：25 March 2022，
  
  Received：03 December 2021，
  
  Accepted：28 January 2022
- 稿件说明：
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王泽凡,姜千红,邢倩等.聚丙烯片晶厚度对受限空间内聚丁烯-1三方晶型形成的影响[J].高分子学报,2022,53(05):514-521.

Wang Ze-fan,Jiang Qian-hong,Xing Qian,et al.The Effect of Lamellar Thickness of iPP on the Formation of Trigonal Modification of PB-1 under Confinement Environment[J].ACTA POLYMERICA SINICA,2022,53(05):514-521.
王泽凡,姜千红,邢倩等.聚丙烯片晶厚度对受限空间内聚丁烯-1三方晶型形成的影响[J].高分子学报,2022,53(05):514-521. DOI： 10.11777/j.issn1000-3304.2021.21370.

Wang Ze-fan,Jiang Qian-hong,Xing Qian,et al.The Effect of Lamellar Thickness of iPP on the Formation of Trigonal Modification of PB-1 under Confinement Environment[J].ACTA POLYMERICA SINICA,2022,53(05):514-521. DOI： 10.11777/j.issn1000-3304.2021.21370.

摘要

当聚丁烯-1以小液滴的形式分散在另一种树脂基体中时，会表现出不同的成核路径，即发生“分级结晶”现象. 前期研究结果表明将聚丁烯-1以≤20%的比例与聚丙烯进行共混，动力学优先的晶型Ⅱ的成核会受到抑制，使得聚丁烯-1小液滴相界面处更容易发生界面诱导成核形成三方的晶型I'. 本工作采用自成核与调控聚丙烯等温结晶温度的方法，改变了聚丙烯/聚丁烯-1界面处聚丙烯的片晶厚度，发现聚丙烯的片晶越厚，晶型I'的结晶速率越慢，进一步证明了三方晶的形成是由界面处聚丙烯诱导得到. 原位广角X射线衍射结果显示，聚丁烯-1的晶型I'是否发生重结晶取决于体系中是否存在晶型Ⅱ晶核. 纯净的晶型I'在升温过程中会直接熔融而不会转化为晶型Ⅱ.

Abstract

Polybutene-1 (PB-1) could behave different crystallization paths when it is finely dispersed into large number of small droplets

which is so-called "fractioned crystallization" phenomenon. According to our previous research

the nucleation of the kinetic favored form Ⅱ could be suppressed when it is blended with polypropylene (

PP) with content lower than 20%. In this situation

trigonal form I' could be generated at the interface of the droplets. Self-nucleation and the manipulation of isothermal crystallization temperature methods are involved to modify lamellar thickness of

PP in this work. These results clearly show that crystallization temperature of PB-1 trigonal crystals is controlled by

temperatures. According to Gibbs-Thomson equation

it could be concluded that the nucleation of form I' could be hindered by thicker

PP lamellae.

In situ

wide angle X-ray diffraction (WAXD) experiment is also conducted

which confirms that the melt and re-crystallization of PB-1 is controlled by the existence of form Ⅱ nuclei generated at low temperature. Pure form I' could melt directly without transformin

g into form Ⅱ crystals during heating process. Our results shed new lights on understanding the effect of interface on fractionated crystallization.

关键词

聚丙烯聚丁烯-1受限空间结晶

Keywords

PolypropylenePolybutene-1Confined spaceCrystallization

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The Effect of Lamellar Thickness of iPP on the Formation of Trigonal Modification of PB-1 under Confinement Environment

DOI：10.11777/j.issn1000-3304.2021.21370

摘要

Abstract

关键词

Keywords

references