摘要
本文中对ACR的组成及粒径对R—PVC抗冲性能的影响,用简单模型进行了理论分析和验证。发现内核粒径(D_W)为115.8nm的ACR的较佳组成为PBA/PMMA(wt%)=55/45,组成相同的ACR,当交联PBA核粒径(D_W)在85～115.8nm范围内变化时,抗冲改性效果随粒径的增加而增加;PBA平均粒径(D_W)相同时,内核PBA的分散度越小,对R—PVC的抗冲改性效果越好。DSC研究表明:有两个明显的玻璃化转变温度,R—PVC中加入6phr的ACR,能使其加工性能得到改善,提高材料的缺口冲击强度。
The influences of composition, particle size and its distribution of ACR on impact strength, hardness and Vicar soft point of R-PVC was discussed. It was found that the best composition of ACR wasPBA/PMMA=55/45(wt%) when Dw of crosslinked PBA was 115.8nm. The higher the Dw(<115.8nm)of PBA in ACR, the sharper the distribution of PBA core, and the higher impact strength of PVC modified DSC indicated. There are two obvious glass transition temperature. The procesibility was improved and natch impact was increaeds as 6phr of ACR being incorporated.
出处
《中国塑料》
CAS
CSCD
北大核心
1997年第5期53-58,共6页
China Plastics
