Thermal-triggered Trans-1, 4-polyisoprene/polyethylene wax shape memory and self-healing composites. (July 2022)

• Record Type: Journal Article
• Authors: Wang, Qi; Ma, Yuan; Meng, Jiafeng; Liu, Xuncong; Xia, Lin
• Is Part Of: Polymer testing. Volume 111(2022)
• Publication Date: 2022-07
• Subjects: Trans-1, 4-polyisoprene -- Polyethylene wax -- Micro-structure -- Shape memory; Polymers -- Testing -- Periodicals; Polymères -- Tests -- Périodiques; 620.1920287
• DOI: 10.1016/j.polymertesting.2022.107601
• Languages: English
• ISSNs: 0142-9418

Abstract

Abstract: The development of intelligent materials is a key research direction of modern high-tech new materials. Polymers with stimuli-responsive shape memory function or self-healing function are an important branch of smart polymer materials. A series of shape memory TPI/PEW composites with self-healing properties were designed and prepared in this manuscript. The mechanical, curing, thermodynamic, shape memory properties and self-healing properties of TPI/PEW composites were studied by DSC, XRD and DMA method. The results showed that the introduction of PEW had a significant impact on the overall performance of composites, especially on shape memory and self-healing properties. Specifically, the crystalline region of PEW can be used as a reversible phase of shape memory behavior, which also play a key role of diffusion and fusion in self-healing behavior. Therefore, the shape memory properties and self-healing properties were greatly improved by the increase of PEW content. When TPI/PEW was 50/50, the shape fixation rate (Rf ) and shape recovery rate (Rr ) were 97.94% and 91.54% respectively, and self-healing efficiency of composites reached 20.74%. These unique shape memory and self-healing properties might expand the application of these composites, especially in smart materials field. Highlights: A series of shape memory TPI/PEW composites with excellent self-healing properties were designed and prepared in this manuscript. The introduction of PEW had a significant impact on the overall performance of TPI/PEW composites, especially on shape memory and self-healing properties. The shape memory properties and self-healing properties were greatly improved by the increase of PEW content. When TPI/PEW was 50/50, the shape fixation rate (Rf ) and shape recovery rate (Rr ) were 97.94% and 91.54% respectively, and self-healing efficiency of composites reached 20.74%.