%0 Journal Article
%T 粉末天然橡胶的性能研究
%A 姜士宽
%A 张桂梅
%A 徐荣
%A 邹建云
%A 郑文代
%J -
%D 2014
%X 研究粉末天然橡胶(PNR)的性能，并与酸凝天然橡胶(NR)进行对比。结果表明：与酸凝NR相比，PNR的灰分质量分数、氮质量分数、挥发分质量分数、塑性初值和塑性保持率较高，杂质质量分数、丙酮溶物质量分数和门尼粘度较低；PNR混炼胶的流动性较好，M<sub>L</sub>稍低，M<sub>H</sub>稍高，t<sub>s1</sub>和t<sub>s2</sub>较小，t<sub>10</sub>、t<sub>50</sub>和t<sub>90</sub>较大，硫化速率较慢；PNR硫化胶的拉伸强度、300%和500%定伸应力较大，拉断伸长率较小。隔离剂的用量宜为2～3份。;The properties of powdered NR(PNR) were investigated，and compared with those of  acid coagulated natural rubber (NR-a).The results showed that，compared with NR-a，the ash content，nitrogen content，volatile content，initial plasticity and plasticity retention index of PNR were higher，and the impurity content，acetone soluble content and Mooney viscosity were lower.Compared with NR-a，the PNR mix possessed higher M<sub>H</sub>，t<sub>10</sub>，t<sub>50</sub> andt<sub>90</sub>，lowerM<sub>L</sub>，t<sub>s1</sub> and t<sub>s2</sub>，and had a lower curing rate.The tensile strength，the moduli at 300% and 500% elongation of PNR vulcanizate were higher than those of NR-a vulcanizate，but the elongation at break was lower.The optimum addition level of release agent was 2～3 phr
%K [粉末天然橡胶
%K 天然橡胶
%K 性能
%K 微观结构
%K 粉末天然橡胶
%K 天然橡胶
%K 性能
%K 微观结构
%K powdered NR
%K NR
%K property
%K microstructure]
%U http://www.rubbertire.cn/gy/xjgy/ch/reader/view_abstract.aspx?file_no=XJ20140404&flag=1