Thermo-Responsive Shape Memory Thermoplastic Elastomer Based on Natural Rubber and Ethylene Octene Copolymer Blends

IF 2 4区工程技术 Q3 ENGINEERING, CHEMICAL

Advances in Polymer Technology Pub Date : 2023-10-30 DOI:10.1155/2023/7276854

Ekwipoo Kalkornsurapranee, Adisak Keereerak, Nussana Lehman, Akarapong Tuljittraporn, Jobish Johns, Nattapon Uthaipan

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引用次数: 0

Abstract

The shape memory (SM) polymers with superior SM properties were successfully fabricated based on melt blending of natural rubber (NR) and ethylene octene copolymer (EOC) at various crystallinity of EOC phase. The differential scanning calorimetry analysis, mechanical properties, temperature scanning stress relaxation, and shape memory properties were studied. Results revealed that the mechanical and thermal properties of the prepared NR/EOC blends improved as a function of amount of ethylene fraction in the EOC phase. The ethylene segment of EOC in the NR/EOC blend is triggered as a stimulus-sensitive domain. The shape memory properties in terms of shape fixity and shape recovery efficiencies of the blends tended to increase with the increasing of crystalline segments in the blends. The shape memory properties of the prepared blends substantially exceed the best performance (close to 100%) by blending the NR/EOC at 50/50 parts by weight, having 62%–80% of ethylene content in the EOC phase, which corresponds to approximately 3°–16° of crystallinity of EOC phase in the blends.

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基于天然橡胶和乙烯辛烯共聚物共混物的热响应形状记忆热塑性弹性体

将天然橡胶(NR)与乙烯辛烯共聚物(EOC)在不同的EOC相结晶度下熔融共混，成功制备了具有优异形状记忆性能的形状记忆聚合物(SM)。研究了其差示扫描量热分析、力学性能、温度扫描应力松弛和形状记忆性能。结果表明，制备的NR/EOC共混物的力学性能和热性能随着EOC相中乙烯组分含量的增加而改善。在NR/EOC共混体系中，EOC的乙烯段被激发为一个刺激敏感域。随着共混物中晶段的增加，共混物的形状记忆性能(形状固定性和形状恢复效率)有增加的趋势。当NR/EOC按50/50的重量比例共混时，所制备的共混物的形状记忆性能大大超过了最佳性能(接近100%)，EOC相的乙烯含量为62%-80%，这相当于共混物中EOC相的结晶度约为3°-16°。

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

Advances in Polymer Technology 工程技术-高分子科学

CiteScore

5.50

自引率

0.00%

发文量

审稿时长

9 months

期刊介绍： Advances in Polymer Technology publishes articles reporting important developments in polymeric materials, their manufacture and processing, and polymer product design, as well as those considering the economic and environmental impacts of polymer technology. The journal primarily caters to researchers, technologists, engineers, consultants, and production personnel.