摘要
采用IR,1H-NMR和13C-NMR研究了聚烯丙基氯化铵(PAAC)模板对丙烯酰胺(AM)/丙烯酸(AA)共聚产物结构的影响,发现这种模板对共聚物P(AM/AA)序列结构和分子量有重要影响.由于共聚合体系中AA单体在PAAC模板聚合物上预组装,使得模板体系共聚物比无模板体系共聚物的AA和AM序列长度显著增加.这种类似多嵌段结构得到pKa′测定的进一步验证.另外模板分子量大小,模板和AA单体摩尔比,AM和AA摩尔比对共聚物结构的影响也进行了研究.应当指出这种模板聚合产物分离模板后仍有少量不能分离掉的PAAC聚合物存在.
The influence of PAAC template on the structure of resulting eopolymers from the aerylamide （AM）/ acrylic acide （AA）/polyallylammonium chloride（PAAC） template copolymerization aqueous system was studied by IR, 1^H-NMR and 13^C-NMR. It was found that the template of this type had a great effect on the sequence distribution and molecular weight of copolymer P（AM/AA）. As the pre-assembly of AA monomers onto the PAAC template, copolymers from the template system exhibited significantly longer AA and AM sequences compared with those of copolymers from non-template systems. This block-like structure was further verified by dissociation constant（pK＇a ） measurements. In addition the influence of PAAC molecular weight, molar ratio of template to monomer AA and molar ratio of AM to AA was also studied. It should be noted that the copolymer product after separation contained a small amount of bended template.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2005年第6期874-878,共5页
Acta Polymerica Sinica
基金
国家重点基础研究发展项目规划(项目号G1999022503)资助项目
