Analysis and Characterization of Microwave Irradiation–Induced Graft Copolymerization of Methyl Methacrylate onto DelignifiedGrewia OptivaFiber

2014 ◽  
Vol 19 (2) ◽  
pp. 115-123 ◽  
Author(s):  
Amar Singh Singha ◽  
Bhanu Priya Thakur ◽  
Deepak Pathania
Keyword(s):  
Microwave Irradiation ◽  
Methyl Methacrylate ◽  
Graft Copolymerization

scholarly journals Graft Copolymerization of Methyl Methacrylate and Vinyltriethoxysilane onto Natural Rubber

2021 ◽  
Vol 31 (4) ◽  
pp. 55-60
Keyword(s):  
Nmr Spectroscopy ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Tensile Property ◽  
Graft Copolymer ◽  
Graft Copolymerization ◽  
Silica Particles ◽  
Grafting Efficiency

Preparation and characterization of natural rubber grafted with methyl methacrylate (MMA) and vinytriethoxysilane (VTES) were performed in the present work. Graft copolymerization of methyl methacryate was carried out in latex stage, and VTES was added during the graft copolymerization of MMA. FTIR and NMR spectroscopy were used to investigate the structure of graft copolymer and determination of conversion and grafting efficiency of MMA. It confirmed that the poly(methyl methacrylate) (PMMA) and silica particles (PVTES) were successfully formed in NR-graft-PMMA-PVTES graft copolymer. Conversions of MMA were about 90-100%; however, MMA grafting efficiency decreased as the MMA concentrations increased. Tensile property of NR-graft-PMMA-PVTES was found to improve compared with that of pure NR.

Graft Copolymerization of Methyl Methacrylate onto Natural Rubber by Microwave Irradiation

2010 ◽  
Vol 93-94 ◽  
pp. 39-42
Author(s):  
Sirichai Piyaauksornsak ◽  
Boonchoat Paosawatyanyong ◽  
Napida Hinchiranan
Keyword(s):  
Energy Consumption ◽  
Reaction Time ◽  
Nmr Spectroscopy ◽  
Microwave Irradiation ◽  
Chemical Modification ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
1H Nmr Spectroscopy ◽  
Graft Copolymerization ◽  
Initiation System

The graft copolymerization is one chemical modification methods to improve natural rubber (NR)’s properties via both solution and latex phases. To enhance the polarity of NR, methyl methacrylate (MMA) was applied for graft copolymerization of NR in the presence of thermal or redox initiators. However, the conventional graft copolymerization generally spends long reaction time (ca. 6-8 h). Due to less energy consumption with faster heating rate, the microwave irradiation was used to induce graft copolmerization of MMA onto NR latex using redox initiation system. By comparing with the conventional grafting method at the same grafting properties, the graft copolymerization of MMA onto NR induced by microwave at 100 W spent the shorter reaction time ca. 15 min; whilst, the conventional method required the longer reaction time as 7 h. The influence of microwave power on the grafting properties was investigated. The structure of graft product was also analyzed by using FTIR and 1H NMR spectroscopy.

Graft copolymerization of methyl methacrylate onto bamboo cellulose under microwave irradiation

2011 ◽  
Vol 83 (1) ◽  
pp. 264-269 ◽  
Author(s):  
Zhenglong Wan ◽  
Zhouyi Xiong ◽  
Heling Ren ◽  
Yuanyuan Huang ◽  
Huaxi Liu ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Methyl Methacrylate ◽  
Graft Copolymerization

Optical Characterization of Monodispersed Aaqueous Cu2+-Doped CdS Nanoparticles Prepared Under Microwave Irradiation Conditions

2014 ◽  
Vol 01 (999) ◽  
pp. 1-1
Author(s):  
Wei Zhu ◽  
Qihui Shen ◽  
Xinjian Bao ◽  
Xiao Bai ◽  
Tingting Li ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Optical Characterization ◽  
Cds Nanoparticles

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
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