期刊
CARBOHYDRATE POLYMERS
卷 68, 期 4, 页码 626-636出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2006.07.031
关键词
graft copolymer; hydroxypropyl methylcellulose; ethyl acrylate; cellulose derivatives; characterization; property
The synthesis of hydroxypropyl methylcellulose-g-poly (ethyl acrylate) was carried out by potassium persulfate induced graft copolymerization in homogeneous aqueous medium, By varying the reaction conditions, graft copolymers with different percentage of grafting were prepared. These graft copolymers were characterized by fourier transform infrared spectra (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), thermogravimetric analyses (TGA), X-ray diffraction analysis (XRD), and dynamic light scattering (DLS) methods. The molecular weight of grafted and ungrafted polymer chains determined by gel permeation chromatography (GPC) increased with increasing monomer and matrix concentration but decreased with increasing initiator concentration and reaction temperature. The mechanical properties of graft copolymers were measured as function of the percentage of grafting. In addition, the equilibrium humidity adsorption behavior and the disintegration time of the grafted copolymer films were also studied. (c) 2006 Elsevier Ltd. All rights reserved.
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