Insights in the molecular structure of low- and high-molecular weight poly(styrene-maleic anhydride) from vibrational and resonance spectroscopy

被引:26
作者
Schoukens, Gustaaf [1 ]
Martins, Jose [2 ]
Samyn, Pieter [3 ]
机构
[1] Univ Ghent, Dept Text, B-9052 Ghent, Belgium
[2] Univ Ghent, Fac Sci, B-9000 Ghent, Belgium
[3] Univ Freiburg, Inst Forest Utilizat, D-79085 Freiburg, Germany
关键词
Styrene-maleic anhydride; Spectroscopy; Structure; MALEIC-ANHYDRIDE; POLY(STYRENE-CO-MALEIC ANHYDRIDE); POLY(STYRENE-ALT-MALEIC ANHYDRIDE); SEQUENCE DISTRIBUTION; C-13; NMR; ALTERNATING COPOLYMERIZATION; STYRENE; SPECTRA; POLYMERIZATION; RAMAN;
D O I
10.1016/j.polymer.2012.11.032
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(styrene-maleic anhydride) or SMA are versatile copolymers available in different grades of molecular weight (M-w = 5500-170,000 g/mol) and molar percentage of maleic anhydride (22-50 mol%). As specific grades can be used for the synthesis of nanoscale structures in paper industry, a better understanding of the molecular structure was needed. Therefore, a broad range of SMA grades was analyzed by means of size exclusion chromatography, infrared spectroscopy, Raman spectroscopy and nuclear magnetic resonance spectroscopy. While the nominal composition could be determined by H-1 NMR and Raman spectroscopy, the combination with C-13 NMR and FTIR allowed a more detailed characterization of the molecular structure. The high-molecular weight SMA grades show a heterogeneous molecular structure with segments including high styrene and maleic anhydride moieties, respectively. The formation of film patterns was evaluated by deposition from an acetone solution, resulting in homogeneous films, fibrous structures, or spherical shapes with decreasing diameter as a function of maleic anhydride content including primary particle sizes of 100 nm. This study illustrates intrinsic molecular features of SMA grades that are capable for self-assembly, and can provide a selection tool for future nanoparticle formulation. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:349 / 362
页数:14
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