PMMA/SiO_2共混体系的研究 Ⅰ纳米级SiO_2填充PMMA体系

研究了纳米级ＳｉＯ２填充ＰＭＭＡ体系的性能。结果表明，经不同偶联剂处理的ＳｉＯ２填充ＰＭＭＡ的最大扭矩和最终平衡扭矩呈现如下规律，未处理ＳｉＯ２填充ＰＭＭＡ体系＞Ａ１５１处理ＳｉＯ２填充ＰＭＭＡ体系＞Ａ１１００处理ＳｉＯ２填充ＰＭＭＡ＞Ａ１７４处理ＳｉＯ２填充ＰＭＭＡ体系，偶联剂用量在３％时，体系的拉伸强度呈现峰值。纳米级ＳｉＯ２采用普通的分散方法进行混合时不能达到有效分散，随ＳｉＯ２用量增加拉伸强度、弯曲强度和冲击强度都下降，透光率降低，损耗增加。

Study of PMMA/SiO 2 Blend System:I Filling of PMMA Composite by Nano meter SiO 2

s The property of PMMA filled with nano meter SiO 2 was studied.The results showed the maximum torque and final balanced torque of the PMMA filled with SiO 2 treated by different coupling agents had the tendency like PMMA filled with non treated SiO 2> PMMA filled with A151 treated SiO 2> PMMA filled with A1100 treated SiO 2>PMMA filled with A174 treated SiO 2 When the coupling agent content was 3%,the tensile strength of the blend had a peak value.Nano meter SiO 2 could not be well dispersed in the system by common dispersing method.With the increase of SiO 2 content in the system,the tensile strength,bend strength,impact strength and light transmittance of the blend would decrease,with an increase of loss modulus.