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Stiffening agent for cotton woven fabrics made from methacrylic acid vinyl acetate methylacrylate terpolymer
Author(s) -
Moustafa A. F.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24501
Subject(s) - differential scanning calorimetry , gel permeation chromatography , methacrylic acid , materials science , polymer chemistry , thermal stability , emulsion polymerization , nuclear chemistry , ultimate tensile strength , glass transition , copolymer , chemistry , composite material , organic chemistry , polymer , physics , thermodynamics
The emulsion polymerizations of methacrylic acid (MAA), vinyl acetate (VAc), and methyl acrylate (MA) in different VAc/MA molar concentrations (X 1 , 0.232/0.813; X 2 , 0.348/0.697; X 3 , 0.456/0.581; X 4 , 0.581/0.465; X 5 , 0.697/0.348) and fixed MAA concentration (0.116 mol) were carried out using sodium dodecyl sulfate (SDS; 34 mmol) as emulsifier and potassium persulphate (K 2 S 2 O 8 ; 37 mmol) as initiator at 70 °C for 6 h in semicontinuous reaction mode. The average molecular weights ( M n , M w ) and the molecular weights distributions were determined using gel permeation chromatography (GPC). All terpolymers prepared showed monomodal molecular weights distributions. Glass transition ( T g ), crystallization ( T c ), and melting ( T m ) temperatures and thermal stability of the prepared terpolymers were determined using differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA), respectively. The elongation percentage at rupture, tensile strength and accelerated thermal aging were determined for X 1–5 terpolymers, as functions of the molar composition in the emulsion polymerization feed. The terpolymers prepared, X 1–5 terpolymers, were tested as stiffening agents for cotton woven fabrics through crosslinking to cellulose, using sodium hypophosphite monohydrate (NaH 2 PO 2 ·H 2 O) as catalyst. The effect of X 1–5 compositions upon the stiffening efficiency was discussed. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 2006