A tailor-made method to recycle slow-curing thermoset of phthalonitrile by constructing self-composite with the improved properties

被引：14

作者：

Yang, Xulin ^{[1
]}

Lei, Wenwu ^{[1
]}

Liu, Qiancheng ^{[2
]}

Li, Ying ^{[1
]}

Li, Kui ^{[1
]}

Wang, Pan ^{[1
]}

Feng, Wei ^{[1
]}

机构：

[1] Chengdu Univ, Sch Mech Engn, Chengdu 610106, Sichuan, Peoples R China

[2] Chengdu Univ, Inst Adv Study, Chengdu 610106, Sichuan, Peoples R China

来源：

COMPOSITES COMMUNICATIONS | 2021年 / 26卷

关键词：

Thermoset recycling; Self-composite; Phthalonitrile; Compatibility; THERMAL-PROPERTIES; RESINS; FUTURE; WASTE;

D O I：

10.1016/j.coco.2021.100791

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Considering the excellent comprehensive properties and high cost of slow-curing thermoset phthalonitrile (PN) resin, discarding of PN materials increases the burden on the environment, but also is a waste of resources. The current study proposed a tailor-made method to recycle PN products by constructing the self-composite (PNSC). Based on the curing gradient, the infusible PN polymer (PPNP) was crushed, graded and directly reused as the reinforcement for its prepolymer (PNP). Due to the co-curing of PNP and PPNP, a transform from a heterogeneous phase-separation to a continuous structure indicated PN self-composite was successfully formed after 320 degrees C/4 h curing. Thanks to the self-composite structure, PNSC exhibited the parallel or superior mechanical and thermal properties than those heterogeneous PN/filler composites. This research has demonstrated a closeto-commercial, effective and efficient recycling method for PN materials, but also proposed a new concept of self-composite that can be used for the construction and regulation of other thermosetting resin.

引用

页数：7