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Indexed by:期刊论文

Date of Publication:2014-06-01

Journal:ASIAN JOURNAL OF CHEMISTRY

Included Journals:SCIE、Scopus

Volume:26

Issue:11

Page Number:3166-3170

ISSN No.:0970-7077

Key Words:Carboxymethyl starch; Sulfonic acid group; S-Triazine; Thermal stability

Abstract:In this study, novel anionic starch derivatives (2,4-bis(diiminobenzenesulfonic acid disodium salt)[1,3,5] triazine-6-yl)-carboxymethyl starch (BSTS-CMS) were prepared by the reaction of 2,4-bis(diiminobenzenesulfonic acid disodium salt)-6-chloro[1,3,5] triazine (BSTS) with carboxymethyl starch. The molecular weight of the samples with different degrees of substitution (DS) was analyzed by GPC and the structure was characterized by FT-IR. The thermal stability was investigated by non-isothermal thermogravimetry. The results showed that the BSTS-CMS had higher molecular weight (M-w x 10(6) = 3.12-3.56). The different degrees of substitution sample exhibited better temperature resistance properties compared with carboxymethyl starch. The viscosity of sample has the excellent stability towards pH 2-12. In addition, the thermogravimetric analysis of BSTS-CMS proved that it has good thermal stability compared with starch and carboxymethyl starch.