Super toughness and reinforcement of recycled high-density polyethylene/ poly(ethylene terephthalate) composite achieved by oriented spherical crystal structure
文献类型： 外文期刊
第一作者： Liang, Ji-feng
作者： Liang, Ji-feng;Wang, Jin;Qin, Sen;Qu, Jin-ping;Qin, Sen;Wang, Jin;Qu, Jin-ping;Liang, Ji-feng;Wang, Jin;Qu, Jin-ping
作者机构：
关键词： Polymer-matrix composites (PMCs); Mechanical properties; Injection molding; Microstructural analysis
期刊名称：COMPOSITES PART B-ENGINEERING （ 影响因子：14.2； 五年影响因子：12.7 ）
ISSN： 1359-8368
年卷期： 2025 年 294 卷
页码：
收录情况： SCI
摘要： The simultaneous toughening and reinforcement of immiscible blend system is one of the main obstacles to the additive-free physical recycling of polyethylene (PE)-based mixed waste. To address this challenge, a low-cost volume-pulsation injection molding (VPIM) method is introduced into physical recycling to construct oriented spherical crystal structure with radial skeleton that has never been reported before, achieving both super- toughness and reinforcement of multi-recycled HDPE/PET composite. Compared with those of virgin HDPE prepared by conventional injection molding (CIM), impact and yield strengths of multi-recycled HDPE/PET composite prepared by VPIM are increased by 3629 % and 48 %, respectively. According to phase, crystal, and impact-fractured surface morphologies, excellent mechanical properties of multi-recycled HDPE/PET composite under VPIM are attributed to the formation of rPET submicron-fibrils, satisfactory interfacial adhesion, and oriented spherical crystals with radial skeleton. The morphological analysis results are verified by DSC, DMA, 2DWAXD, and 2D-SAXS. The influence mechanism of VPIM is proposed to reveal that the construction of oriented spherical crystal structure with radial skeleton is derived from the radial growth of hybrid shish-kebabs with multiple shish. This study enriches the microstructure control of immiscible blend systems and paves a new avenue toward additive-free physical recycling of plastic waste.
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