Enhancing high-temperature resistance and energy storage properties of polypropylene via grafting with glycidyl methacrylate

IF 5.1 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2026-08-11 Epub Date: 2026-06-01 DOI:10.1016/j.polymer.2026.130326

Gang Liu , Sen Meng , Cheng Yao , Zhiwu Xiong , Qingjiang Li , Taishan Hu , Chengqian Yi , Shangmao Hu

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引用次数: 0

Abstract

Conventional biaxially oriented polypropylene (PP) often suffers from elevated leakage current and reduced dielectric strength at high temperatures, preventing it from meeting the requirements for high-temperature-resistant, high-energy-density dielectric materials in advanced equipment, such as ultrahigh-voltage power transmission and new energy vehicles. This work proposes a strategy for grafting crosslinkable polar monomer glycidyl methacrylate (GMA) onto PP to improve its temperature resistance and energy storage performance. The introduction of GMA enhances the polarization capacity of PP and forms a crosslinked network structure within the matrix via the ring-opening reaction of epoxy groups, substantially strengthening intermolecular interactions and improving the mechanical and breakdown properties of PP. The modified PP exhibits a discharged energy density at 25 °C that is 60% higher than that of pure PP and maintains excellent stability even at 105 °C. The application of chemical grafting of crosslinkable functional monomers overcomes the limitations of traditional physical modification in terms of processing properties and provides a new approach to the fabrication of high-temperature-resistant, high-energy-storage all-organic dielectrics.

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甲基丙烯酸缩水甘油酯接枝提高聚丙烯的耐高温性能和储能性能

传统的双轴取向聚丙烯（PP）在高温下存在泄漏电流增大、介电强度降低的问题，无法满足特高压输电、新能源汽车等先进设备对耐高温、高能量密度介电材料的要求。本工作提出了一种将可交联极性单体甲基丙烯酸缩水甘油酯（GMA）接枝到PP上的策略，以提高其耐温性能和储能性能。GMA的引入增强了PP的极化能力，并通过环氧基团的开环反应在基体内部形成交联网络结构，大大加强了分子间的相互作用，提高了PP的力学性能和击穿性能。改性PP在25 °C时的放电能量密度比纯PP高60%，即使在105 °C时也保持了优异的稳定性。化学接枝交联功能单体的应用克服了传统物理改性在加工性能方面的局限性，为制备耐高温、高能量存储的全有机电介质提供了新的途径。

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.