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.
出处
《塑料》
CAS
CSCD
北大核心
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)
