Biodegradability of polyisoprene rubber cross-linked with poly(L-cysteine) cross-linker

IF 7.4 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-08-25 DOI:10.1016/j.polymdegradstab.2025.111624

Kousuke Tsuchiya , Yui Tsuji , Kayo Terada , Yoko Horii , Keiji Numata

{"title":"Biodegradability of polyisoprene rubber cross-linked with poly(L-cysteine) cross-linker","authors":"Kousuke Tsuchiya , Yui Tsuji , Kayo Terada , Yoko Horii , Keiji Numata","doi":"10.1016/j.polymdegradstab.2025.111624","DOIUrl":null,"url":null,"abstract":"<div><div>Polyisoprene is biodegradable bio-based polymer as a main component of natural rubber. Cross-linking such as vulcanization enhances physical properties of natural rubber materials, while the cross-linked network structure severely deteriorates biodegradability. In this study, we synthesized a biodegradable polypeptide cross-linker to fabricate cross-linked polyisoprene. The cross-linked polyisoprene was prepared by thiol–ene reaction with poly(<span>l</span>-cysteine). The mechanical properties of the cross-linked polyisoprene ring sample were comparable to that of conventional peroxide-mediated cross-linked polyisoprene. The biodegradability of the cross-linked polyisoprenes was evaluated by biochemical oxygen demand test in the presence of <em>Nocardia takedensis</em>, a rubber degrading bacterium. The cross-linked polyisoprene with poly(<span>l</span>-cysteine) cross-linked structure showed higher biodegradability compared to peroxide-cross-linked one, indicating that the combination of polyisoprene backbone and polypeptide cross-linking structures facilitated biodegradation.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"242 ","pages":"Article 111624"},"PeriodicalIF":7.4000,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Degradation and Stability","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0141391025004537","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}

引用次数: 0

Abstract

Polyisoprene is biodegradable bio-based polymer as a main component of natural rubber. Cross-linking such as vulcanization enhances physical properties of natural rubber materials, while the cross-linked network structure severely deteriorates biodegradability. In this study, we synthesized a biodegradable polypeptide cross-linker to fabricate cross-linked polyisoprene. The cross-linked polyisoprene was prepared by thiol–ene reaction with poly(l-cysteine). The mechanical properties of the cross-linked polyisoprene ring sample were comparable to that of conventional peroxide-mediated cross-linked polyisoprene. The biodegradability of the cross-linked polyisoprenes was evaluated by biochemical oxygen demand test in the presence of Nocardia takedensis, a rubber degrading bacterium. The cross-linked polyisoprene with poly(l-cysteine) cross-linked structure showed higher biodegradability compared to peroxide-cross-linked one, indicating that the combination of polyisoprene backbone and polypeptide cross-linking structures facilitated biodegradation.

查看原文本刊更多论文

聚异戊二烯橡胶与聚l -半胱氨酸交联剂交联的生物降解性

聚异戊二烯是一种可生物降解的生物基聚合物，是天然橡胶的主要成分。硫化等交联提高了天然橡胶材料的物理性能，而交联的网络结构严重恶化了生物降解性。在本研究中，我们合成了一种可生物降解的多肽交联剂来制备交联聚异戊二烯。采用巯基烯与聚l-半胱氨酸反应制备交联聚异戊二烯。交联聚异戊二烯环样品的力学性能与传统的过氧化物介导的交联聚异戊二烯相当。采用生化需氧量试验对交联聚异戊二烯在橡胶降解菌takednocardia存在下的生物降解性进行了评价。具有聚（l-半胱氨酸）交联结构的聚异戊二烯比具有过氧化物交联结构的聚异戊二烯具有更高的生物降解性，说明聚异戊二烯骨架与多肽交联结构的结合促进了生物降解。

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 Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.