摘要
采用核磁共振、粘度测定及透射电镜法比较了两种两亲接枝共聚物聚甲基丙烯酸甲酯接枝聚氧乙烯(PMMA-g-PEO)和聚苯乙烯接枝聚氧乙烯(PS-g-PEO)在甲苯中溶液的性质,结果表明,甲苯对PM-MA-g-PEO的选择性更高,形成的胶束粒径更小。随着浓度的增大和温度的降低,两者的聚集态结构均有一个从单分子到小胶束再到大胶束的变化过程。但PMMA-g-PEO由单分子转变成胶束时的温度更高,临界胶束浓度(CMC)值更小。PEO含量和接枝链长均影响两者的CMC值。
In this essay, there were some comparisons about the solution properties of amphiphilic graft copolymers PMMAgPEO and PSgPEO by means of 1HNMR, TEM and viscometer. For PMMAgPEO, toluene has a relatively higher selective property and smaller micelles can be formed. With a increase in concentration and decrease in temperature, the conformation can all be transformed from momomolecules to small micelles, even to big micelles. The transforming temperature for PMMAgPEO from momomolecules to small micelles is higher than that of PSgPEO, and the micelles of PMMAgPEO can be formed in lower concentration. The length. and content of side chain PEO also affect the CMC values.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2003年第5期115-119,共5页
Polymer Materials Science & Engineering
基金
湖北省教委自然科学基金资助项目
