摘要
在含有烷基改性聚硅氧烷的丙酮与甲苯的混合溶媒中，使用均苯四甲酸酐（PMDA）和4，4’-二氨基二苯醚（ODA）合成聚酰胺酸／烷基改性聚硅氧烷高分子共混物，该高分子共混物与溶媒分离后再在250℃经高温热环化得到聚酰亚胺／烷基改性聚硅氧烷复合微粒子。该复合微粒子的粒径主要分布在2-6μm的狭窄范围内，其热分解温度为384．6℃，并直具有极好的疏水化度。
The polymer blend of poly（amide-acide）/Polysiloxane modified by alkyl group was prepared by polymerization of pyromellitic dianhydride （PMDA） and 4,4＇-oxydianiline diamine （ODA） in a mixed solvent of acetone and toluene containing polysiloxane modified by alkyl group. A cyclic reaction occurred when the blend isolated from co-solvent was heated at 250℃ and the composite particles from polyimide/polysiloxane modified by alkyl group were obtained. The composite particles possess a narrow size distribution in the range of 2-6μm. Thermal decomposition temperature of the composite particles is 384.6℃ and their hydrophobicity is excellent.
出处
《中国材料科技与设备》
2007年第2期59-61,共3页
Chinese Materials Science Technology & Equipment
关键词
聚酰亚胺
烷基改性聚硅氧烷
复合微粒子
粒径分布
疏水化度
Polyimide
Polysiloxane modified by alkyl group
Composite particles
Size distribution
Hydrophobicity
