CAJ | 학술논문

将废旧轮胎胶粉(WRP)与聚四氢呋喃二醇型热塑性聚氨酯(PU)共混制备了一系列不同WRP 含量的 PU/ WRP 共混材料,通过傅里叶变换红外光谱和扫描电子显微镜研究了 WRP 在 PU 基体中的分散性以及二者间的结合作用,考察了 WRP 含量对共混材料性能的影响。结果表明,在 PU/ WRP共混材料中,WRP 削弱了 PU 硬硬段之间的氢键作用,增强了硬软段间的氢键结合程度,且 WRP 均匀分散在 PU 基体中,与 PU 基体有一定程度的相容性,但与 PU 基体的附着力较弱；与纯 PU 相比较,PU/WRP 共混材料的邵尔 A 硬度变化不大,300%定伸应力增大,拉伸强度减小,且随着 WRP 含量的增加,300%定伸应力和拉伸强度先小幅增大后减小,当 WRP 质量分数达到20%时,300%定伸应力和拉伸强度达到最大值；PU/ WRP 共混材料的耐磨性能、耐水性能和耐油性能均低于纯 PU,其中 WRP 质量分数为20%时,共混材料的耐水性能和耐油性能相对较好。
장폐구륜태효분(WRP)여취사경부남이순형열소성취안지(PU)공혼제비료일계렬불동WRP 함량적 PU/ WRP 공혼재료,통과부리협변환홍외광보화소묘전자현미경연구료 WRP 재 PU 기체중적분산성이급이자간적결합작용,고찰료 WRP 함량대공혼재료성능적영향。결과표명,재 PU/ WRP공혼재료중,WRP 삭약료 PU 경경단지간적경건작용,증강료경연단간적경건결합정도,차 WRP 균균분산재 PU 기체중,여 PU 기체유일정정도적상용성,단여 PU 기체적부착력교약；여순 PU 상비교,PU/WRP 공혼재료적소이 A 경도변화불대,300%정신응력증대,랍신강도감소,차수착 WRP 함량적증가,300%정신응력화랍신강도선소폭증대후감소,당 WRP 질량분수체도20%시,300%정신응력화랍신강도체도최대치；PU/ WRP 공혼재료적내마성능、내수성능화내유성능균저우순 PU,기중 WRP 질량분수위20%시,공혼재료적내수성능화내유성능상대교호。
The blends with different contents of waste rubber powder ( WRP) were prepared from WRP and poly ( tetramethyleneoxide glycol ) (PTMG) thermoplastic polyurethane ( PU) . The dispersion of WRP in PU matrix and the interface bond between them were studied by Fourier trans-form infrared spectroscopy and scanning electron mi-croscopy, and the effects of WRP content on proper-ties of the blends were investigated. The results showed that WRP weakened the hydrogen bonding between hard-hard segments and promoted that be-tween hard-soft segments, resulting in relatively uni-form dispersion of WRP in PU matrix and a certain extent compatibility of the two. Compared to pure PU, the blends kept almost the same Shore A hard-ness and exhibited better modulus at 300% and poor tensile strength. With increasing WRP content, the modulus at 300% and tensile strength first increased slightly and then decreased, and reached the maxi-mum values at mass fraction of WRP 20% . The blends displayed lower wear resistance, water and oil resistances than pure PU, and the blend with WRP mass fraction 20% showed relatively good wa-ter and oil resistances.