Microwave promoted synthesis of chitosan-graft-poly(acrylonitrile)

被引：78

作者：

Singh, V ^{[1
]}

Tripathi, DN

Tiwari, A

Sanghi, R

机构：

[1] Univ Allahabad, Dept Chem, Allahabad 211002, Uttar Pradesh, India

[2] Indian Inst Technol, Facil Ecol & Analyt Testing, Kanpur 208016, Uttar Pradesh, India

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2005年 / 95卷 / 04期

关键词：

chitosan-grafted-polyacrylonitrile; microwave irradiation; K2S2O8/ascorbic acid;

D O I：

10.1002/app.21245

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Using microwave (MW) irradiation, polyacrylonitrile was grafted onto chitosan with 170% grafting yield under homogeneous conditions in 1.5 min in the bsence of any radical initiator or catalyst. Under similar conditions a maximum grafting of 105% could be achieved when the K2S2O8/ascorbic acid redox system was used as radical initiator in a thermostatic water bath at 35 +/- 2degreesC. The representative graft copolymer was characterized by Fourier transform infrared spectra, thermogravimetric analysis, and X-ray diffraction measurement, taking chitosan as a reference. The effects of such reaction variables as monomer/ chitosan concentration, MW power, and exposure time on the graft co polymerization were studied. A probable mechanism for grafting without the redox system under microwaves was proposed. (C) 2004 Wiley Periodicals, Inc.

引用

页码：820 / 825

页数：6

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