摘要
采用溶液聚合法直接合成聚丙烯酸(PAA),通过接枝反应合成了新型两亲性PAA-聚(γ-苄基-L-谷氨酸酯)(PBLG)接枝共聚物,分析了PAA与PBLG的相对分子质量及结构,并通过1H-核磁共振(1H-NMR)、红外光谱(IR)对共聚物进行了表征。结果表明,随着引发剂偶氮二异丁腈用量的增加或聚合温度的升高,PAA的数均相对分子质量减小;随着引发剂正丁胺用量的增加,PBLG的黏均相对分子质量减小。共聚物中含有接枝到PAA链上的疏水性PBLG,同时还含有未反应的亲水性羧基;共聚物在NaCl或NaOH水溶液中形成的球形胶束具有明显的核壳结构。
Poly （ acrylic acid ） （ PAA ） -g- poly -γ- benzyl-L-glutamate） （PBLG） copolymer was synthesized by grafting reaction of PAA and PBLG. The relative molecular mass and structure of PAA and PBLG were studied. The structure of （PAA-g- PBLG） was characterized by ~H-nuclear magnetic resonance and infra-red spectroscopy. The results showed that the relative number-average molecular mass of PAA decreased with increasing amount of azobisisobutyronitrile and reaction temperature. The relative viscosity-average molecular mass of PBLG decreased with increasing amount of n-butylamine. PBLG was grafted onto PAA, meanwhile non-reactive--COOH group existed in PAA chain. Shell- core structure of PAA-g-PBLG copolymer micelle was formed in NaCl or NaOH solution.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2007年第6期416-419,共4页
China Synthetic Rubber Industry
