Toughening Polypropylene Pipe by Tailoring the Multilayer of β-Transcrystallinity Alternating β-Spherulite

IF 5.2 1区化学 Q1 POLYMER SCIENCE Macromolecules Pub Date : 2025-02-05 DOI:10.1021/acs.macromol.4c02985

Zhenkun Wang, Guiying Yu, Huan Li, Weiyouran Hong, Quanjia Du, Haoran Wang, Shaoyun Guo, Chunhai Li

引用次数: 0

Abstract

The applications of the polypropylene (PP) pipe are strongly restricted because of its poor impact toughness. However, conventional toughening methods always tend to sacrifice strength. Here, the strategy is proposed to toughen PP pipes without sacrificing strength, that is, constructing the alternatively arranged multilayers of the β-transcrystallinity and the β-spherulite layers by self-developed microlayer pipe coextrusion technology. Compared with the conventional blend pipe only composed of β-spherulites, the microlayer pipe with the multilayer super crystalline structure shows an improvement of 29% in impact toughness and comparable strength. This enhancement in the impact toughness is because the β-transcrystallinity induces the formation of the larger fan-shaped craze zone and semimolten fracture surfaces with severe plastic deformation. Therefore, this effort could be a useful reference for preparing high-performance PP pipes.

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用β-透晶度交替β-球晶层裁剪聚丙烯管增韧

聚丙烯（PP）管材冲击韧性差，严重制约了其应用。然而，传统的增韧方法往往会牺牲强度。本文提出了在不牺牲强度的情况下对PP管材进行增韧的策略，即采用自行开发的微层管材共挤技术构建β-跨晶层和β-球晶层交替排列的多层结构。与仅由β-球晶组成的常规共混管相比，具有多层超晶结构的微层管的冲击韧性和强度提高了29%。这种冲击韧性的增强是由于β-穿晶性诱导形成了较大的扇形开裂区和半熔断口，具有严重的塑性变形。为高性能PP管材的制备提供了有益的参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.