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yong dta fang fa ce ding ding ben jiao ru zhong ding er xi de han liang
Author(s): 
Pages: 58-59+61
Year: Issue:  1
Journal: Qilu Petrochemical Technology

Keyword:  测量值丁苯胶乳丁二烯平均值差示扫描量热技术测定结合量苯乙烯含量计算测量;
Abstract: <正> 一、前言测定丁苯胶乳(SBR)中丁二烯(BD)含量的经典方法是用化学法测定结合的苯乙烯(St)量,再用差减法结算出BD含量。该方法麻烦费时。目前测定SBR中St含量的方法是用乙醇将乳胶凝固,然后再将聚合物溶解,经两次沉淀精制后制得试样,再用阿贝折射仪测定折射率,进而算出St的结合量,但此法处理样品费时,且只能测得St含量,不能直接测出BD含量。国外曾报道采用差示扫描量热技术
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