检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]广西工学院生物与化学工程系,广西柳州545006
出 处:《广西工学院学报》2009年第3期12-16,共5页Journal of Guangxi University of Technology
基 金:广西科学基金项目(桂科自0481022)资助
摘 要:为论述季铵碱类催化剂的制备及其对HDI三聚反应的催化作用,采用了溶液聚合工艺对HDI单体进行聚合,通过对反应产物分子中-NCO含量、游离HDI含量进行分析,考察了催化剂种类及用量、反应温度、反应时间对加成反应的影响,确定了理想催化剂为四甲基氢氧化铵和双季铵碱及其制备反应条件.The quaternary ammonium alkali catalyst preparation and its effect on HDI trimer catalytic reaction were discussed.HDI monomer was polymerized by solution polymerization process.The type and amount of catalyst,reaction temperature,and reaction time on the effects of addition reaction were examined by theNCO content and free HDI content in elements of reaction products analysis.TMAH and double ammonium alkali are the ideal catalyst and preparation reaction conditions were determined.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.3