Characterization of low molecular mass thermosensitive diblock copolymers and their self-assembly by means of analytical ultracentrifugation

被引：4

作者：

Ortega, Alvaro ^{[1
]}

Pamies, Ramon ^{[1
]}

Zhu, Kaizheng ^{[2
]}

Kjoniksen, Anna-Lena ^{[3
]}

Nystrom, Bo ^{[2
]}

Garcia de la Torre, Jose ^{[1
]}

机构：

[1] Univ Murcia, Dept Quim Fis, Fac Quim, E-30100 Murcia, Spain

[2] Univ Oslo, Dept Chem, N-0315 Oslo, Norway

[3] Univ Oslo, Dept Pharmaceut, Sch Pharm, N-0316 Oslo, Norway

来源：

COLLOID AND POLYMER SCIENCE | 2012年 / 290卷 / 04期

关键词：

Analytical ultracentrifugation; PNIPAAM; Thermoresponsive copolymers; TRANSFER RADICAL POLYMERIZATION; INDUCED PHASE-TRANSITION; POLY(ETHYLENE OXIDE); AQUEOUS-SOLUTION; TEMPERATURE; POLY(N-ISOPROPYLACRYLAMIDE); BEHAVIOR; DILUTE; POLYSTYRENE; PARTICLES;

D O I：

10.1007/s00396-011-2542-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The characterization of a series of four poly(N-isopropylacrylamide)-based copolymers with a hydrophilic block of poly(ethylene glycol) with a variable length (MPEG (n) -b-PNIPAAM(71)) has been performed by means of analytical ultracentrifugation. Molecular mass, partial specific volume, sedimentation coefficient (s), and hydrodynamic radius (R (h)) have been determined and successfully compared with other techniques. In addition, the self-assembly process of these four copolymers has been evaluated, finding multimeric species at temperatures lower than low critical solution temperature in the case of the longest copolymer.

引用

页码：297 / 306

页数：10

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