Toward High-performance Polypropylene <italic style="font-style: italic">via</italic> Controlling Crystalline Morphology

Ke Wang; Yan-ling Zhu; Qiang Fu

doi:10.11777/j.issn1000-3304.2017.17077

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Toward High-performance Polypropylene via Controlling Crystalline Morphology

Feature Articles | 更新时间：2021-01-26

- Toward High-performance Polypropylene via Controlling Crystalline Morphology
- Acta Polymerica Sinica Issue 7, Pages: 1073-1081(2017)
- 作者机构：
  
  四川大学高分子材料科学与工程学院高分子材料工程国家重点实验室成都 610065
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2017.17077
  CLC：
- Published：2017-7，
  
  Received：5 April 2017，
  
  Revised：8 May 2017，
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Ke Wang, Yan-ling Zhu, Qiang Fu. Toward High-performance Polypropylene via Controlling Crystalline Morphology. [J]. Acta Polymerica Sinica (7):1073-1081(2017)
DOI：

Ke Wang, Yan-ling Zhu, Qiang Fu. Toward High-performance Polypropylene via Controlling Crystalline Morphology. [J]. Acta Polymerica Sinica (7):1073-1081(2017) DOI： 10.11777/j.issn1000-3304.2017.17077.

摘要

聚丙烯作为目前最重要的通用塑料之一，对其进行高质化改性具有重大的现实意义.基于聚丙烯的同质多晶态行为，加入成核剂进行

结晶改性是改善聚丙烯韧性和热稳定性的有效方式.过去的研究主要关注结晶度、

晶含量等对性能的影响.而近年来我们提出通过调控聚丙烯的

结晶形态来实现其高性能化的新思路，并开展了卓有成效的研究工作：（1）利用小分子成核剂的溶解性及自组装影响聚丙烯的结晶行为，获得了如球晶、横晶、花瓣状晶等形态，实现了对

结晶形态的有效调控；（2）特定的结晶形态能够使聚丙烯的韧性显著增加，并且热变形温度进一步提高，证实结晶形态会对宏观性能发挥重要作用；（3）

结晶形态调控有利于获得更佳的成孔均匀性与高的孔隙率，对制备高品质锂电池隔膜有明显的指导意义.结晶形态调控可望成为实现结晶性聚合物高性能化与功能化通行的、高效的策略.

Abstract

Polypropylene (PP) is still one of the most important general plastics

and it is of great significance to achieve high-performance PP materials. As a semicrystalline polymer

PP is essentially polymorphism. At least five polymorphs have been identified

i.e.

and quasi-hexagonal form. Among them

form is highly desirable

due to its excellent physical properties. However

crystals are hard to be obtained

via

common crystalline condition. The polymorphic modification by adding

-nucleator (

-NA) is a powerful method for achieving dominant

form and thus tailoring the toughness and thermal stability of PP. In contrast to many past researches which focused on the roles of crystallinity and

-phase content

a new methodology has been recently suggested which optimized the physical properties of PP by controlling

-crystalline morphology. Some relevant studies include:(1) to assess the solubility and self-assembly behavior of

-NA by using temperature gradient (g-

) field; (2) to control the

-crystalline morphology by processing varables and

-NA content

and receive super-high toughness and good heat stability; (3) to reveal the rule of stretching-induced porosity in the

-PP films with different crystalline morphologies.

-NA of low-molecular-weight is soluble in the melt of PP

which will self-assemble into supermolecular structures prior to the primary crystallization of PP during the cooling process. Such supermolecular structures act as templates for the guidance of PP crystallization

resulting in special crystalline morphologies. By using the g-

technique

the dependence of

-NA solubility on molten temperature and nucleator loading could be clarified readily. Thus the crystalline morphology of

-PP is controllable

and different morphologies

such as spherulite

transcrystallinity and flower-like aggregations

are achievable through adjusting the solubility and self-assembly behavior of

-NA. Special crystalline morphology leads to a significant increase in the tensile ductility of

-PP. Meanwhile

the heat distortion temperature and homogeneity of microporosity are also strongly dependent on

-crystalline morphology. Obviously

the manipulation of crystalline morphology is a promising pathway to realize high-performance in crystalline polymers.

关键词

聚丙烯同质多晶态β晶形态增韧微孔膜

Keywords

PolypropylenePolymorphsβ-Crystalline morphologyToughnessMicroporous membranep

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Related Institution

SINOPEC Beijing Research Institute of Chemical Industry

College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University

College of Chemistry and Materials Engineering, Beijing Technology and Business University

Beijing Institute of Automatic Control Equipment

Institute of Chemistry, Chinese Academy of Sciences

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Toward High-performance Polypropylene via Controlling Crystalline Morphology

DOI：10.11777/j.issn1000-3304.2017.17077

摘要

Abstract

关键词

Keywords

references