A novel polymer based on ethylene-methyl acrylate copolymer/chloroprene rubber thermoplastic vulcanizates with rapid thermo-responsive shape memory property

IF 3.6 4区材料科学 Q2 MATERIALS SCIENCE, COMPOSITES

Journal of Thermoplastic Composite Materials Pub Date : 2024-07-30 DOI:10.1177/08927057241270891

Dazhi Zhu, Wanwu Ma, Jianqiang Chu, Zhiyuan Gong, Zhaobo Wang

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引用次数: 0

Abstract

A simple and effective strategy for preparing thermo-responsive shape memory polymers (TSMPs) can be designed where the novel TSMPs based on ethylene-methyl acrylate copolymer (EMA) and chlorinated polyethylene rubber (CR) thermoplastic vulcanizates (TPVs) were prepared using dynamic vulcanization. The morphology of the EMA/CR TPVs exhibited a sea-island structure obviously; moreover, the EMA served as the continuous phase and mainly provided the shape fixation (SF) capability of the blend, while the highly elastic CR was acted as the dispersed phase and provided the primary driving force during the shape recovery (SR) process. The SF and SR behaviors of the EMA/CR TPVs can be effectively controlled by varying the weight ratio of EMA/CR blends. Increasing the weight ratio of EMA/CR, the SF% of the EMA/CR TPVs was enhanced while the SR% was decreased remarkably. The shape memory behaviors of EMA/CR TPVs were significantly influenced by temperature. Notably, when the fixation and recovery temperatures were all set at 95°C, both the SF% and SR% of the EMA/CR TPVs with a weight ratio of 80/20 exceeded 95%, and the SR time was 15∼20s, demonstrating the excellent shape memory property.

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一种基于乙烯-丙烯酸甲酯共聚物/氯丁橡胶热塑性硫化弹性体的新型聚合物，具有快速热响应形状记忆特性

利用动态硫化法制备了基于乙烯-丙烯酸甲酯共聚物（EMA）和氯化聚乙烯橡胶（CR）热塑性硫化弹性体（TPVs）的新型热响应形状记忆聚合物（TSMPs），设计了一种简单有效的热响应形状记忆聚合物（TSMPs）制备策略。EMA/CR 热塑性硫化弹性体的形貌明显呈现海岛结构；此外，EMA 作为连续相，主要提供共混物的形状固定（SF）能力，而高弹性 CR 作为分散相，在形状恢复（SR）过程中提供主要驱动力。通过改变 EMA/CR 共混物的重量比，可以有效控制 EMA/CR 热塑性硫化弹性体的 SF 和 SR 行为。随着 EMA/CR 重量比的增加，EMA/CR 热塑性硫化弹性体的 SF% 得到提高，而 SR% 则明显下降。EMA/CR 热塑性硫化弹性体的形状记忆行为受温度的影响很大。值得注意的是，当固定温度和恢复温度都设定为 95°C 时，重量比为 80/20 的 EMA/CR 热塑性硫化弹性体的 SF% 和 SR% 都超过了 95%，SR 时间为 15∼20s，显示出优异的形状记忆特性。

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来源期刊

Journal of Thermoplastic Composite Materials 工程技术-材料科学：复合

CiteScore

8.00

自引率

18.20%

发文量

104

审稿时长

5.9 months

期刊介绍： The Journal of Thermoplastic Composite Materials is a fully peer-reviewed international journal that publishes original research and review articles on polymers, nanocomposites, and particulate-, discontinuous-, and continuous-fiber-reinforced materials in the areas of processing, materials science, mechanics, durability, design, non destructive evaluation and manufacturing science. This journal is a member of the Committee on Publication Ethics (COPE).