超声挤出DP/纳米SiO_2复合材料的拉伸与流变性能  

Tensile and Rheological Properties of DP/Nano-SiO_2 Composites by Ultrasonic Extrusion

作　　者：彭波[1] 郭少云[1] 刘志明[1] 

机构地区：[1]四川大学高分子研究所高分子材料工程国家重点实验室,四川成都610065

出　　处：《塑料》2006年第6期20-23,共4页Plastics

基　　金：美国Dow化学公司资助项目(DowAgreementNumber215930)

摘　　要：在高能超声波作用下,将纳米SiO2和一种新颖的共聚聚丙烯(DP)熔融共混,制备纳米复合材料,研究了纳米SiO2含量和超声波对复合材料拉伸和流变性能,以及脆断面形貌的影响。结果表明,低含量(≤2%)纳米SiO2对DP有增强作用,随着填料含量增加断裂强度下降。超声波的引入能提高含量较高SiO2(>2%)的复合材料的断裂强度和断裂伸长率,降低体系黏度,并有助于纳米SiO2在DP基体中均匀分散。By the aid of high-power ultrasonic wave, novel propylene copolymer （DP）/nano-SiO2 composites of various concentrations were prepared by means of melt blending. The effects of different nano-SiO2 content and ultrasonic wave on morphological,rheological and tensile property of composites,including strength at break and elongation at break, were investigated. The results showed that the lower nano-SiO2 content （ ≤2wt% ） increased strength at break of DP but strength at break further decreased with increasing nano-SiO2 content. Introduction of ultrasonic wave improved strength at break and elongation at break of composites, especially in higher nano-SiO2 content （ 〉 2wt% ） ,reduced their melt viscosities and was beneficial in facilitating nano-SiO2 dispersed in DP matrix.

关 键 词：超声波 聚丙烯 纳米SIO2 复合材料 

分 类 号：TB383[一般工业技术—材料科学与工程]