Ultrafine full-vulcanized powdered rubbers/PVC compounds with higher toughness and higher heat resistance

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• 作者：Qingguo Wang ; Xiaohong Zhang ; Shanyuan Liu ; Hua Gui ; Jinmei Lai ; Yiqun Liu ; Jianming Gao ; Fan Huang ; Zhihai Song ; BangHui Tan and Jinliang Qiao
• 关键词：Rigid PVC/UFPR compounds ; Toughening ; Glass transition temperature
• 刊名：Polymer
• 出版年：2005
• 期刊代码：83_00323861
• 类别：ms
• 出版时间：2005
• 卷：46
• 期：24
• 页码：10614-10617
• 文件大小：319 K

摘要

A new type of rigid PVC compound with higher toughness and higher heat resistance was prepared by using a new type of PVC modifier, ultrafine full-vulcanized powdered rubber (UFPR). The UFPRs used in this paper were butadiene nitrile UFPR-1 (NBR-UFPR-1) with particle size of about 150 nm and butadiene nitrile UFPR-2 (NBR-UFPR-2) with particle size of about 90 nm. Dynamic mechanical thermal analysis (DMTA) showed that glass transition temperature (T_g) of PVC in compounds increased from 77.52 °C of neat PVC to 82.37 and 85.67 °C, while the notched impact strengths increased from 3.1 kJ/m² of neat PVC to 5.2, 5.5 kJ/m², respectively. It can be found that both T_g and toughness of PVC have been improved simultaneously, and the smaller the particle size of NBR-UFPRs, the higher the T_g and the impact strength. The property could be attributed to larger interface and more interfacial interaction between NBR-UFPRs and PVC matrix. Transmission electron microscopy (TEM) showed that NBR-UFPRs could be well dispersed in PVC matrix.