摘要
研究了制备聚乙二醇-b-聚己内酯-b-聚乙二醇两亲性三嵌段共聚物(PECL)纳米胶束的各种影响因素,发现PECL纳米胶束的粒径受制备方法的影响较大,且随着PECL的相对分子质量和混合溶剂中二氯甲烷用量的增大而增大。PECL的临界聚集浓度小于4×10-6mol/L,随着共聚物相对分子质量的增大而减小,纳米分散液的临界聚沉浓度随着PECL中PCL相对分子质量的增加而减小,分散液稳定性下降。
The factors of the poly(ethylene glycol)-b-polycaprolactone-b-poly(ethylene glycol) (PECL) nanomicelles were researched. The results show that the size of PECL nanomicelles is largely influenced by the prepared methods and increased upon increasing the molecular weight of PECL and the content of dichloride methane in the mixed solvent. The critical associaton concentrations of PECL are less than 4×10^(-6) mol/L and decreases upon increasing the molecular weight of PECL. The critical flocculation point and the stability of nano-dispersion decreases upon increasing the molecular weight of PCL segment in PECL.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2004年第2期217-219,223,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助课题(30170227)
