摘要
以三氯氧磷POCl3作为桥联剂,制备P功能化纳米氮化硼(P-BNNSs),进而原位聚合制备了P-BNNSs改性的热塑性聚氨酯复合材料(P-BNNSs/TPU),采用FTIR,XPS,NMR,FESEM对材料进行结构和形貌表征,测试了复合材料的热稳定性、拉伸性能和热导率.研究表明:添加P-BNNSs改善了TPU的拉伸强度和导热性,添加质量分数为7.5%的P-BNNSs,复合材料热导率达到0.3987 W/mK.
Thermoplastic polyurethane(PU)elastomer prepared by prepolymerization chain expansion was blended with surface-modified boron nitride nanosheets(P-BNNSs)to produce a thermally conductive interface material.BNNSs treated by a Phosphorus Oxychloride(POCl 3)bridging agent and PU-grafted P-BNNSs were prepared to fabricate a composite with better thermal conductivity and mechanical strength.The P-BNNSs/TPU composite exhibited an enhancement in thermal conductivity(up to 0.3987 W/mK)and mechanical properties at P-BNNSs’mass fraction of 7.5%.It can be concluded that these composite materials may be promising materials for a significant performance improvement in terms of both the thermal and mechanical properties of PU-based polymers.
作者
孟娇娇
潘高飞
葛鑫
宋金玲
张邦文
MENG Jiaojiao;PAN Gaofei;GE xin;SONG Jinling;ZHANG Bangwen(Materials and Metallurgy School,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《内蒙古科技大学学报》
CAS
2020年第2期112-117,122,共7页
Journal of Inner Mongolia University of Science and Technology
基金
内蒙古自治区科技创新引导基金重大资助项目(KCBJ2018032).
关键词
共价键修饰
氮化硼纳米片
热塑性聚氨酯
复合材料
热导率
covalent modification
BN nanosheets
thermoplastic polyurethane
composite
thermal conductivity
