Poly(N-vinylpyrrolidone)-polydimethylsiloxane amphiphilic ABA triblock copolymers

被引：7
|
作者：
Pavlovic, Drazen [1 ,3 ]
Lou, Qin [1 ]
Linhardt, Jeffrey G. [2 ]
Kuenzler, Jay F. [2 ]
Shipp, Devon A. [1 ]
机构：
[1] Clarkson Univ, Dept Chem & Biomol Sci, Ctr Adv Mat Proc, Potsdam, NY 13699 USA
[2] Bausch & Lomb, 1400 N Goodman St, Rochester, NY 14603 USA
[3] Royal Coll Surgeons Ireland, Dept Pharmaceut & Med Chem, 123 St Stephens Green, Dublin, Ireland
来源：
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2017年 / 55卷 / 20期
关键词：
N-vinylpyrrolidone; polysiloxanes; reversible addition-fragmentation chain transfer (RAFT) polymerization; block copolymers; FRAGMENTATION CHAIN-TRANSFER; TRANSFER RADICAL POLYMERIZATION; TRANSFER RAFT POLYMERIZATION; CONTAINING BLOCK-COPOLYMERS; DIBLOCK COPOLYMERS; N-VINYLPYRROLIDONE; MEDIATED POLYMERIZATION; AQUEOUS-SOLUTIONS; CO-MICELLES; POLYDIMETHYLSILOXANE;
D O I：
10.1002/pola.28715
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Triblock copolymers of N-vinylpyrrolidone (NVP) and polydimethylsiloxane (PDMS) were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization using two different types of difunctional telechelic PDMS-based dixanthate macroinitiators. The incorporation of PDMS into the triblock copolymers was evidenced by H-1 NMR spectroscopy and varied between 4 mol% and as high as 20 mol%, dependent on reaction time and monomer conversion. The copolymer homogeneity was characterized in terms of molecular weight distribution determined by GPC to estimate the level of control over the chain length. Monomodal molecular weight distributions were observed, and H-1 NMR spectroscopy indicated the copolymers had number average molecular weights (M-n) ranging between 28,000 and 160,000 g/mol. In addition, thin film phase separation and critical micelle concentrations for these copolymers were analyzed via transmission electron microscopy and surface tension measurements, respectively. (c) 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 3387-3394
引用
收藏
页码：3387 / 3394
页数：8
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