Highly enhanced toughness and thermal oxygen aging resistance of PA 6 via novel designed macromolecular antioxidants

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2024-09-08 DOI:10.1016/j.polymer.2024.127614

{"title":"Highly enhanced toughness and thermal oxygen aging resistance of PA 6 via novel designed macromolecular antioxidants","authors":"","doi":"10.1016/j.polymer.2024.127614","DOIUrl":null,"url":null,"abstract":"<div><p>Polyamide 6 (PA6) is widely utilized, yet it confronts challenges such as susceptibility to thermal oxidative aging and high sensitivity to notch impact during usage. In addressing these issues, two novel toughening macromolecular antioxidants, 3-(3,5-di-<em>tert</em>-butyl-4-hydroxyphenyl) propionic acid 2-acrylamidoethyl ester styrene copolymer (PAS) and 3-(3,5-di-<em>tert</em>-butyl-4-hydroxyphenyl) propionic acid 2-acrylamidoethyl-<em>N</em>-phenylmaleimide copolymer (PAN), were synthesized via free radical copolymerization. Upon incorporation into PA6, their effects on PA6 performance were investigated. Relative to pure PA6, PA6/PAN and PA6/PAS exhibited significant improvements in fracture elongation, with increases of 136.91 % and 313.83 % respectively, along with notch impact strength enhancements of 18.55 % and 24.89 % respectively. This enhancement can be attributed to PAN and PAS reducing the hydrogen bond density between PA6 molecular chains. Subsequent long-term accelerated thermal aging tests conducted at 150 °C, as well as performance testing of samples before and after aging, revealed that the aging of PA6/PAN and PA6/PAS could be delayed by 4–12 days. The exceptional anti-thermal oxidative aging ability and toughening effect of these two macromolecular antioxidants in PA6 showcase promising prospects for its expanded applications.</p></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":null,"pages":null},"PeriodicalIF":4.1000,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0032386124009509/pdfft?md5=77b0f7dfae41f45c0f744dc41462ada4&pid=1-s2.0-S0032386124009509-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032386124009509","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}

引用次数: 0

Abstract

Polyamide 6 (PA6) is widely utilized, yet it confronts challenges such as susceptibility to thermal oxidative aging and high sensitivity to notch impact during usage. In addressing these issues, two novel toughening macromolecular antioxidants, 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid 2-acrylamidoethyl ester styrene copolymer (PAS) and 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid 2-acrylamidoethyl-N-phenylmaleimide copolymer (PAN), were synthesized via free radical copolymerization. Upon incorporation into PA6, their effects on PA6 performance were investigated. Relative to pure PA6, PA6/PAN and PA6/PAS exhibited significant improvements in fracture elongation, with increases of 136.91 % and 313.83 % respectively, along with notch impact strength enhancements of 18.55 % and 24.89 % respectively. This enhancement can be attributed to PAN and PAS reducing the hydrogen bond density between PA6 molecular chains. Subsequent long-term accelerated thermal aging tests conducted at 150 °C, as well as performance testing of samples before and after aging, revealed that the aging of PA6/PAN and PA6/PAS could be delayed by 4–12 days. The exceptional anti-thermal oxidative aging ability and toughening effect of these two macromolecular antioxidants in PA6 showcase promising prospects for its expanded applications.

Abstract Image

查看原文本刊更多论文

通过设计新型高分子抗氧化剂高度增强 PA 6 的韧性和耐热氧老化性

聚酰胺 6（PA6）被广泛使用，但它也面临着一些挑战，如在使用过程中易受热氧化老化和对缺口冲击的高度敏感性。为了解决这些问题，我们通过自由基共聚合成了两种新型增韧大分子抗氧化剂，即 3-(3,5-二叔丁基-4-羟基苯基)丙酸 2-丙烯酰胺基乙基酯苯乙烯共聚物（PAS）和 3-(3,5-二叔丁基-4-羟基苯基)丙酸 2-丙烯酰胺基乙基-N-苯基马来酰亚胺共聚物（PAN）。在加入 PA6 后，研究了它们对 PA6 性能的影响。与纯 PA6 相比，PA6/PAN 和 PA6/PAS 的断裂伸长率有显著提高，分别提高了 136.91 % 和 313.83 %，缺口冲击强度也分别提高了 18.55 % 和 24.89 %。这种提高可归因于 PAN 和 PAS 降低了 PA6 分子链之间的氢键密度。随后在 150 °C 下进行的长期加速热老化试验以及对老化前后样品的性能测试表明，PA6/PAN 和 PA6/PAS 的老化可延迟 4-12 天。这两种大分子抗氧化剂在 PA6 中卓越的抗热氧化老化能力和增韧效果为 PA6 的广泛应用展示了广阔的前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.