r-PET／TPV／LDPE-g-AA共混合金材料的研究  

Study on the r-PET/TPV/LDPE-g-AA blends

作　　者：张华集[1] 甘晓平[1] 陈晓[1] 张雯[1] 沈永鑫[1] 

机构地区：[1]福建师范大学化学与材料学院,福建省高分子材料重点实验室,福州350007

出　　处：《化工新型材料》2012年第2期59-61,126,共4页New Chemical Materials

基　　金：福建省科技厅项目(2009H0017);福州市科技计划项目(2010-G-109)

摘　　要：以动态硫化热塑性弹性体(TPV)为增韧材料,回收聚对苯二甲酸乙二醇酯(r-PET)为基体材料,丙烯酸接枝低密度聚乙烯(LDPE-g-AA)为相容剂,制备r-PET/TPV/LDPE-g-AA共混合金材料。用DMA、DSC、SEM分析TPV及LDPE-g-AA对r-PET玻璃化转变温度、结晶性能、断面相结构的影响,测试了共混合金材料的力学性能。结果表明:加入20%TPV,r-PET/TPV共混材料的熔融温度下降4.85℃,结晶温度提高了2.44℃,断裂伸长率及缺口冲击强度明显提高,弯曲强度和拉伸强度略有下降;加入LDPE-g-AA,r-PET/TPV共混材料玻璃化转变温度向低温方向移动,TPV球状粒子嵌入r-PET基体材料中,相容性提高;含2.5%LDPE-g-AA的r-PET/TPV/LDPE-g-AA共混合金材料,与纯r-PET相比,熔融温度下降7.19℃,断裂伸长率提高133.28%,缺口冲击强度提高59.39%,柔韧性较大幅度提高。r-PET/TPV/LDPE-g-AA alloys were prepared by using thermoplastic vulcanizates（TPV） as toughener, recycled polyethylene terephthalate （r-PET） as matrix material, acrylic acid grafted low density polyethylene （LDPE-g-AA） as compatibilizer. DMA, DSC, SEM were employed to characterize glass transition temperature, compatibility, fracture surface and mechanical properties. The results showed that with addition of 20wt% TPV, the melting temperature of r-PET decreased by 4. 85℃, crystallization temperature increased by 2. 44℃, elongation at break and notched impactstrength inproved evidently, flexural strength and tensile strength decreased slightly. In the presence ot LDPE-g-AA, the glass transition temperaturer of r-PET shi{ted to lower temperature, TPV spherical particles embedded in r-PET matrix material, and compatibility of the two phase was improved. With 2. 5wt%//0 of LDPE-g-AA, the melting temperature dropped by 7.19℃, elongation at break and notched impact strength increased by 133.28% and 59.39%. respectively, the flexibility of the blend improved substantially compared with neat r-PET.

关 键 词：r-PET TPV LDPE-g-AA 合金材料 

分 类 号：TB332[一般工业技术—材料科学与工程]