A novel graft macromolecular coupling agent with well-defined structure was synthesized by atom transfer radical polymerization(ATRP). Since the silicon of graft polymers possesses a strong affinity to hydroxyl minera...A novel graft macromolecular coupling agent with well-defined structure was synthesized by atom transfer radical polymerization(ATRP). Since the silicon of graft polymers possesses a strong affinity to hydroxyl mineral, it gives fillers some new properties such as the increase of the interaction of fillers with matrix. The properties, structure of macromolecular coupling agent and its composite were studied by dynamic mechanical spectra, IR, UV, NMR, GPC and SEM.展开更多
采用 Cu 催化剂和偶氮引发剂进行了甲基丙烯酸丁酯的反向原子转移自由基乳液聚合 ,研究了乳化剂、催化剂、反应时间对乳液稳定性、乳胶粒大小和形态以及聚合反应可控性的影响。结果表明原子转移自由基乳液聚合和常规乳液聚合存在着很大...采用 Cu 催化剂和偶氮引发剂进行了甲基丙烯酸丁酯的反向原子转移自由基乳液聚合 ,研究了乳化剂、催化剂、反应时间对乳液稳定性、乳胶粒大小和形态以及聚合反应可控性的影响。结果表明原子转移自由基乳液聚合和常规乳液聚合存在着很大的差异 ,特别在成核机理和动力学方面。展开更多
本试验以氯甲基化交联聚苯乙烯树脂(CMCPS)为载体和大分子引发剂,溴化亚铜/2,2'-联吡啶为催化剂体系,采用了表面引发原子转移自由基聚合技术(SI-ATRP),使丙烯酰胺接枝到CMCPS树脂表面,制得了新型的聚丙烯酰胺树脂(PAM-CMCPS),并且...本试验以氯甲基化交联聚苯乙烯树脂(CMCPS)为载体和大分子引发剂,溴化亚铜/2,2'-联吡啶为催化剂体系,采用了表面引发原子转移自由基聚合技术(SI-ATRP),使丙烯酰胺接枝到CMCPS树脂表面,制得了新型的聚丙烯酰胺树脂(PAM-CMCPS),并且用元素分析和扫描电镜对其进行了表征。考察了该树脂对2,4-二氯苯氧乙酸的吸附性能、动力学和热力学参数。试验结果表明:该树脂对2,4-二氯苯氧乙酸的吸附量随溶液初始浓度和温度的升高而增加,当初始浓度为8 mmol/L时吸附效果最佳,树脂的静态饱和吸附容量为111.01 mg/g,Langmuir和Freundlich方程都能呈现良好的拟合度。热力学平衡方程计算得ΔG<0,ΔH=268.23 k J/mol,ΔS>0,表明该吸附过程是一个自发、吸热、熵增加的过程。展开更多
文摘A novel graft macromolecular coupling agent with well-defined structure was synthesized by atom transfer radical polymerization(ATRP). Since the silicon of graft polymers possesses a strong affinity to hydroxyl mineral, it gives fillers some new properties such as the increase of the interaction of fillers with matrix. The properties, structure of macromolecular coupling agent and its composite were studied by dynamic mechanical spectra, IR, UV, NMR, GPC and SEM.
文摘本试验以氯甲基化交联聚苯乙烯树脂(CMCPS)为载体和大分子引发剂,溴化亚铜/2,2'-联吡啶为催化剂体系,采用了表面引发原子转移自由基聚合技术(SI-ATRP),使丙烯酰胺接枝到CMCPS树脂表面,制得了新型的聚丙烯酰胺树脂(PAM-CMCPS),并且用元素分析和扫描电镜对其进行了表征。考察了该树脂对2,4-二氯苯氧乙酸的吸附性能、动力学和热力学参数。试验结果表明:该树脂对2,4-二氯苯氧乙酸的吸附量随溶液初始浓度和温度的升高而增加,当初始浓度为8 mmol/L时吸附效果最佳,树脂的静态饱和吸附容量为111.01 mg/g,Langmuir和Freundlich方程都能呈现良好的拟合度。热力学平衡方程计算得ΔG<0,ΔH=268.23 k J/mol,ΔS>0,表明该吸附过程是一个自发、吸热、熵增加的过程。
