Thermal behavior of cotton grafted with vinyl monomers individually and in mixture compositions

Abstract

SynopsisThermal analysis of cotton samples grafted with acrylamide, acrylonitrile, methyl acrylate, and methyl methacrylate individually and in mixture compositions has been carried out. Additional endothermic peaks in the DTA curves characteristic of the polymers grafted were observed. Graft copolymerization of acrylamide and acrylonitrile makes cotton thermally more stable, while in the case of methyl acrylate-and methyl methacrylate-grafted cottons, the initial decomposition starts a t higher temperatures, but subsequent decomposition is faster and the overall thermal stability is lowered. In the case of binary mixtures of acrylamide and acrylonitrile, inception of decomposition starts earlier, but subsequent decomposition takes place a t much higher temperatures than for individual monomer-grafted cottons. Interaction between monomers during grafting is indicated. When fabric samples containing polyacrylamide grafts are methylolated and subsequently crosslinked, there is a reduction in the thermal stability of the treated cotton.

Behaviour of chemically modified cottons towards thermal treatment. Part III. Poly(acrylonitrile)‐cellulose graft copolymers

“…The monomer (MMA) is separated with a separating funnel, dried over anhydrous sodium sulfate and finally fractionated using a fractionating column of about 15 theoretical plates. The phthalo-and biphthalocyanines were prepared according t o a previous publication [7]. The oxides used were analytical grade reagents.…”

Characterization and thermal stability of cellulose‐graft‐polyacryloniytrile prepared by using KMnO4/citric acid redox system

“…In these studies, however, no systematic characterization of products was reported. It was reported that thermal resistance of the grafted copolymer was improved 18–22. In these studies too, characterization of samples are not enough or thermal analysis data are not fully compared with component homopolymers, i.e., cellulose and polyacrylonitrile.…”

Synthesis of Flax-G-Copolymers Under Pressure for Use in Phenolic Composites as Reinforcement

“…Grafting of MMA onto cellulose and cellulosic derivatives is well investigated by chemical and radiation methods 1 . Graft copolymerization of MMA and its binary mixtures with different vinyl monomers onto cellulose and cellulosic derivatives using ceric ammonium nitrate as an initiator has been extensively studied 2 . Haque et al 3 grafted MMA onto jute and reported the effect of temperature, initiator concentration and lignin content of jute on percentage grafting.…”