Influence of a hydrophobic core on thermoresponsive behavior of dendrimer-based star-shaped poly(2-isopropyl-2-oxazoline) in aqueous solutions

被引：22
作者：
Amirova, Alina [1 ]
Rodchenko, Serafim [2 ]
Milenin, Sergey [3 ]
Tatarinova, Elena [3 ]
Kurlykin, Mikhail [1 ]
Tenkovtsev, Andrey [1 ]
Filippov, Alexander [1 ]
机构：
[1] Russian Acad Sci, Inst Macromol Cpds, Bolshoy Pr 31, St Petersburg 199004, Russia
[2] St Petersburg Natl Res Univ Informat Technol Mech, Kronverkskiy Pr 49, St Petersburg 197101, Russia
[3] Russian Acad Sci, Enikolopov Inst Synthet Polymer Mat, Profsoyuznaya St 70, Moscow 117393, Russia
来源：
JOURNAL OF POLYMER RESEARCH | 2017年 / 24卷 / 08期
基金：
俄罗斯科学基金会; 俄罗斯基础研究基金会;
关键词：
Thermosensitive polymer; Poly(2-isopropyl-2-oxazolines); Phase separation; Star polymers; Solution properties; SODIUM DODECYL-SULFATE; BLOCK-COPOLYMERS; SIDE-CHAINS; THERMOSENSITIVE POLY(2-ISOPROPYL-2-OXAZOLINE); CONCENTRATION-DEPENDENCE; UNIMOLECULAR MICELLES; AGGREGATION BEHAVIOR; POLYMERS; COLLAPSE; POLY(2-OXAZOLINE)S;
D O I：
10.1007/s10965-017-1285-5
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The behavior of eight-arm, star-shaped poly(2-isopropyl- 2-oxazoline) (PiPrOx(8)) with a hydrophobic dendrimer core was studied in aqueous solutions by light scattering and turbidimetry methods. In order to reveal the influence of the star-shaped structure, model linear PiPrOxs were investigated for comparison. The experiments were carried out within a 100-fold concentration interval at temperatures from 15 to 63 degrees C. Dendrimer core interaction lead to the formation of different types of aggregates at low temperatures as compared to star-shaped PiPrOx with different cores. The temperatures of the phase separation interval were determined and analyzed depending on concentration. It was shown that macromolecule shrinkage and aggregation occur below the phase separation onset which results from the specific chemical nature of macromolecules and their hydrophilic-hydrophobic balance.
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页数：10
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