摘要
利用金红石型纳米TiO2优异的紫外线屏蔽性能,采用熔融共混法制备了纳米TiO2/高抗冲聚苯乙烯(H IPS)复合材料。经过672 h的氙灯气候加速老化后,缺口强度保持率比未改性H IPS提高了约20%,颜色变化幅度只有未改性H IPS的10%,抗色变能力大幅度提高;质均相对分子质量在整个加速老化期间未发生明显变化,老化672 h后下降幅度只有未改性H IPS的10%,FTIR分析表明,由于纳米TiO2与光稳定剂的协同作用使改性H IPS的光老化速度得到有效抑制,其羰基和羟基吸收峰的振动特征在672 h的老化期间内均未发生明显变化。
Due to excellent ultraviolet shielding function of nano-rutile-TiO2, nano-TiO2/HIPS composite was obtained by melt-blending technique. After 672 h exposure to xenon arc lamp, the retained percentage of notched impact strength was increased by 20% than that of pure HIPS. The variational extent of color parameter is only 10% of pure HIPS, accordingly the ability of resisting color aberration was improved. Rupture of molecule chain was restrained effectively. According to FTIR analysis, the aging mechanism reveals that the cooperating effect of nano-TiO2 in company with organic UV-absorbent can restrict aging rate of modified HIPS in effect. Moreover, there are little changes for absorbing characteristic of carbonyl and hydroxyl group in the 672 h accelerating aging period.
出处
《化学工程》
EI
CAS
CSCD
北大核心
2007年第2期60-63,共4页
Chemical Engineering(China)
