文献类型： 外文期刊

作者： Liang, Ji-feng ¹ ; Wang, Jin ¹ ; Qin, Sen ¹ ; Qu, Jin-ping ¹ ;

作者机构： 1.South China Univ Technol, Natl Engn Res Ctr Novel Equipment Polymer Proc, Guangzhou 510640, Peoples R China

2.Guangdong Acad Agr Sci, Inst Facil Agr, Guangzhou 510640, Peoples R China

3.South China Univ Technol, Guangdong Prov Key Lab Tech & Equipment Macromol A, Guangzhou 510640, Peoples R China

4.South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Peoples R China

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.