Modification on PBS using epoxy-functionalized core–shell starch particles

IF 2.6 4区 化学 Q3 POLYMER SCIENCE
Q. Liu, L. Ren, X. Y. Li, X. Y. Sui, Y. D. Shen, Y. B. Wang, Y. Q. Li, M. Y. Zhang
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引用次数: 0

Abstract

Polybutylene succinate (PBS) is an aliphatic linear polyester that is known for its excellent biodegradability and biocompatibility, making it one of the most promising application polymers. However, its disadvantages of poor toughness, low thermostability, and high crystallinity limit its large-scale commercial applications. In this article, a novel epoxy-functionalized core–shell starch particle (CSP-GMA) is successfully synthesized by virtue of soap-free emulsion polymerization, which consists of a "hard" starch (St) core and a "soft" ethyl acrylate (EA) shell grafted with glycidyl methacrylate (GMA). A binary blend of biodegradable polymers is prepared via a melt blend process with CSP-GMA as a core–shell particle modifier and PBS as a polymer matrix. The mechanical properties, thermal behavior, crystallization properties, stability and microscopic morphology of PBS/CSP-GMA blends are thoroughly studied. The incorporation of 20 wt% CSP-GMA into the PBS blend promotes an increase in the impact strength by 55% and the elongation at break by 173% higher than that of pure PBS respectively, which indicates that our work proposes an efficient strategy for fabricating PBS blends with good comprehensive properties and low cost. The DSC testing shows that the crystallinity of PBS blend is reduced in comparison to PBS, while the crystallization temperature is also decreased, confirming that CSP-GMA can facilitate the crystallization of PBS. The SEM observation reveals that owing to the compatibility arising between two phases interface due to the presence of epoxy group on core–shell starch particle surface, CSP-GMA is better dispersed in the PBS matrix, resulting in the improvement for performance of PBS blends.

Abstract Image

使用环氧功能化核壳淀粉颗粒对 PBS 进行改性
聚丁二酸丁二醇酯(PBS)是一种脂肪族线性聚酯,以其出色的生物降解性和生物相容性而著称,是最有前途的应用聚合物之一。然而,其韧性差、热稳定性低和结晶度高等缺点限制了它的大规模商业应用。本文通过无皂乳液聚合法成功合成了一种新型环氧官能化核壳淀粉颗粒(CSP-GMA),它由 "硬 "淀粉(St)核和接枝了甲基丙烯酸缩水甘油酯(GMA)的 "软 "丙烯酸乙酯(EA)壳组成。以 CSP-GMA 作为核壳粒子改性剂,以 PBS 作为聚合物基质,通过熔融混合工艺制备了一种二元可生物降解聚合物混合物。对 PBS/CSP-GMA 共混物的机械性能、热行为、结晶性能、稳定性和微观形态进行了深入研究。在 PBS 共混物中加入 20 wt% 的 CSP-GMA 后,冲击强度比纯 PBS 提高了 55%,断裂伸长率比纯 PBS 提高了 173%。DSC 测试表明,与 PBS 相比,PBS 共混物的结晶度降低了,结晶温度也降低了,这证实了 CSP-GMA 能够促进 PBS 的结晶。扫描电镜观察表明,由于核壳淀粉颗粒表面存在环氧基团,两相界面具有相容性,CSP-GMA 能更好地分散在 PBS 基体中,从而改善了 PBS 混合物的性能。
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来源期刊
Journal of Polymer Research
Journal of Polymer Research 化学-高分子科学
CiteScore
4.70
自引率
7.10%
发文量
472
审稿时长
3.6 months
期刊介绍: Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.
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