Interactions in miscible blends and complexes of poly(N-acryloylmorpholine) with poly(p-vinylphenol)

被引：24

作者：

Yi, JZ ^{[1
]}

Goh, SH ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

来源：

POLYMER | 2002年 / 43卷 / 16期

关键词：

miscible blends; complexes; poly(N-acryloylmorpholine);

D O I：

10.1016/S0032-3861(02)00291-4

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(p-vinylphenol) (PVPh) and poly(N-acryloylmorpholine) (PAcM) form interpolymer complexes in ethanol/water (1:1) solution. However, only ordinary blends are obtained from dimethylformamide solution. Each of the complexes and ordinary blends shows one composition-dependent glass transition temperature, indicating its single-phase nature. Fourier transform infrared spectroscopy and C-13 solid-state nuclear magnetic resonance spectroscopy reveal the existence of hydrogen-bonding interactions between the hydroxyl groups of PVPh and the carbonyl groups as well as the ether oxygen of PAcM in the blends and complexes. In addition, X-ray photoelectron spectroscopy shows that the nitrogen atoms in PAcM are also involved in hydrogen-bonding interactions. Measurements of proton spin-lattice relaxation time in the rotating frame, T-1rho(H), reveal that each of the complexes and ordinary miscible blends has one composition-dependent T-1rho(H), indicating an intimate mixing on a scale of about 1.5 nm. The blends show a higher degree of surface enrichment of PVPh than the complexes. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：4515 / 4522

页数：8

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