Photo‐induced graft copolymerization, I. Graft copolymerization of methyl methacrylate onto silk in presence of lutidine‐bromine charge transfer complex

Lenka, Subasini; Nayak, Padma L.; Mishra, Munmay K.

doi:10.1002/apmc.1981.050990105

Cited by 8 publications

(1 citation statement)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With a steady‐state assumption, the following expressions [eqs. (1) and (2)] were derived for R p :11 The values of R p evaluated for various monomer (MA) and photoinitiator (CAN) concentrations, for the photografting of MA onto Na‐PCMGG (DS = 0.291), are given in Tables I and II, respectively.…”

Section: Resultsmentioning

confidence: 99%

Ultraviolet‐radiation‐induced graft copolymerization of methyl acrylate onto the sodium salt of partially carboxymethylated guar gum

Thaker

Trivedi

2005

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:In an attempt to modify the sodium salt of partially carboxymethylated guar gum (Na-PCMGG; degree of substitution ϭ 0.291), we studied the ultraviolet-radiation-induced graft copolymerization of methyl acrylate with ceric ammonium nitrate as a photoinitiator. The influence of the grafting yield was studied as a function of the different reaction parameters, and the optimum reaction conditions for photografting were determined. The various reaction parameters included the photoinitiator, nitric acid, and monomer (methyl acrylate) concentrations, the reaction time, the temperature, and the amount of the substrate. A kinetic scheme for photografting copolymerization was proposed, and the results were in good agreement with the kinetic scheme. The graft copolymerization of methyl acrylate onto Na-PCMGG (degree of substitution ϭ 0291) in the presence and absence of ultraviolet radiation was also carried out for the study of the efficiency of the photoinitiator. The influence of carboxymethyl groups added to the guar gum molecule on its behavior toward ultraviolet-radiationinduced grafting with methyl acrylate was also investigated. The evidence of photografting was ascertained with IR spectroscopy and scanning electron microscopy techniques.

show abstract