Graft copolymerization of acrylonitrile and methyl methacrylate monomer mixtures on crumb natural rubber

2002 ◽  
Vol 84 (10) ◽  
pp. 1872-1877 ◽  
Author(s):  
F. E. Okieimen ◽  
I. N. Urhoghide
Keyword(s):  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Graft Copolymerization ◽  
Methacrylate Monomer ◽  
Methyl Methacrylate Monomer

Transport of methyl methacrylate monomer through natural rubber

2010 ◽  
Vol 45 (2) ◽  
pp. 409-417 ◽  
Author(s):  
Jacob John ◽  
Sam Kunchandy ◽  
Anil Kumar ◽  
Anitha Pius ◽  
Sabu Thomas
Keyword(s):  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Methacrylate Monomer ◽  
Methyl Methacrylate Monomer

Graft copolymerization of methyl methacrylate and vinyltriethoxysilane binary monomers onto natural rubber

2021 ◽  
Vol 28 (7) ◽  
Author(s):  
Thuong Nghiem Thi ◽  
Ha Cao Hong ◽  
Yusof Nurul Hayati ◽  
Seiichi Kawahara
Keyword(s):  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Graft Copolymerization

scholarly journals Effect of Ferocene Concentration on the Percent Conversion and Molecular Weight of Poly(Methyl Methacrylate) Homopolymers

2017 ◽  
Vol 14 (2) ◽  
pp. 311-319
Author(s):  
Baghdad Science Journal
Keyword(s):  
Molecular Weight ◽  
Free Radical ◽  
Methyl Methacrylate ◽  
Benzoyl Peroxide ◽  
Radical Polymerization ◽  
Free Oxygen ◽  
Poly Methyl Methacrylate ◽  
Methacrylate Monomer ◽  
Percent Conversion ◽  
Methyl Methacrylate Monomer

This research is addressing the effect of different ferrocene concentration (0.00, 2.15x10-3, 4.30x10-3, 8.60x10-3, and 12.9x10-3) on the bulk free radical polymerization of methyl methacrylate monomer in benzene using benzoyl peroxide as initiator. The polymerization was conducted at 60º C under free oxygen atmosphere. The resulting polymers were characterized by FTIR. The results were compared with the presence and absence of ferrocene at 10% conversion. The %conversion was 3.04% with no ferrocene present in the polymerization medium and its increase to 9.06 with a first lowest ferrocene concentration added, i.e. 2.15 x10-3mol/l. This was positively reflected on the poly(methyl methacrylate) molecular weight measured by viscosity technique, especially in the presence of ferrocene.

Synthesis and grafting of carboxymethyl cellulose from environmental pollutant cellulosic wastes of textile industry

2016 ◽  
Vol 20 (3) ◽  
pp. 126-135 ◽  
Author(s):  
Md. Ibrahim H. Mondal ◽  
Firoz Ahmed
Keyword(s):  
Methyl Methacrylate ◽  
Carboxymethyl Cellulose ◽  
Reaction Medium ◽  
Value Added ◽  
Single Step ◽  
Cellulose Derivatives ◽  
Content Type ◽  
Cellulosic Waste ◽  
Methacrylate Monomer ◽  
Methyl Methacrylate Monomer

Purpose This study aims to explore the use of knitted rag by synthesizing different grades of carboxymethyl cellulose (CMC) by applying multiple-step carboxymethylation techniques. Design/methodology/approach CMC was synthesized from knitted rag, a cellulosic waste of textile and garment industries, in aqueous ethanolic sodium hydroxide and subsequently mono-chloroacetic acid reaction medium. Low-substituted to high-substituted products were obtained from single-step to seven-step carboxymethylation of cellulose. In this way, it was possible to produce low-cost and different grades of substituted carboxymethylated cellulose. The synthesized CMC was characterized, and their physical properties were investigated. The structure of CMC and grafted CMC were investigated by Fourier transform infrared spectroscopy. Findings Solubility, CMC content, degree of substitution and molecular weight of CMC were increased gradually with the increase in the number of reaction steps, although fourth step attained the optimum. The cellulosic waste of knitted rag can easily be used to produce value-added products such as CMC and other cellulose derivatives, and that will ultimately reduce the pollution problems from this waste. Originality/value Grafting of prepared CMC film with methyl methacrylate monomer increased their strength, although decreased rigidity and moisture content because the incorporation of hydrophobic methyl methacrylate monomer was observed.

Sign in / Sign up

Export Citation Format

Share Document