Behavior of aqueous solutions of polymer star with block copolymer poly(2-ethyl-2-oxazoline) and poly(2-isopropyl-2-oxazoline) arms

被引：14
|
作者：
Smirnova, A. V. [1 ]
Kirila, T. U. [1 ]
Kurlykin, M. P. [1 ]
Tenkovtsev, A. V. [1 ]
Filippov, A. P. [1 ]
机构：
[1] Inst Russian Acad Sci, Inst Macromol Cpds, Bolshoy Pr 31, St Petersburg 199004, Russia
来源：
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION | 2017年 / 22卷 / 08期
关键词：
Light scattering and turbidimetry; phase separation temperature; poly-2-oxazoline; star polymers; thermosensitivity; CRITICAL SOLUTION TEMPERATURE; SHAPED POLYMERS; GRAFT COPOLYMER; SIDE-CHAINS; 2-ALKYL-2-OXAZOLINE; POLY(2-OXAZOLINE)S; THERMOSENSITIVITY; MICELLES; BACKBONE; WATER;
D O I：
10.1080/1023666X.2017.1366196
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Eight-arm star-shaped poly(2-alkyl-2-oxazoline) (M approximate to 21,000gmol(-1)) was studied by turbidimetry and light scattering in aqueous solutions within concentration ranging from 0.00038 to 0.0276gcm(-3). The arms were the block copolymers of poly(2-isopropyl-2-oxazoline) (PiPrOx) and poly(2-ethyl-2-oxazoline) (PEtOx). Calix[8]arene core was connected with poly(2-isopropyl-2-oxazoline). The behavior of investigated polymer differed from that of thermosensitive stars with poly(2-alkyl-2-oxazoline) homopolymer arms. At low temperatures, the aggregates were formed due to interaction of hydrophobic cores. The phase separation temperatures T-1 and T-2 of studied star were higher than those for star-shaped poly(2-isopropyl-2-oxazoline) and lower than for poly(2-ethyl-2-oxazoline). T-1 and T-2 increased with dilution.
引用
收藏
页码：677 / 684
页数：8
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