Improvement of thermal properties of Vietnam deproteinized natural rubber via graft copolymerization with styrene/acrylonitrile and diimide transfer hydrogenation

2020 ◽  
Author(s):  
Hieu Nguyen Duy ◽  
Niratchaporn Rimdusit ◽  
Tung Tran Quang ◽  
Quyet Phan Minh ◽  
Nam Vu Trung ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Natural Rubber ◽  
Graft Copolymerization ◽  
Transfer Hydrogenation ◽  
Styrene Acrylonitrile ◽  
Deproteinized Natural Rubber

scholarly journals Improvement of Thermal and Mechanical Properties of Vietnam Deproteinized Natural Rubber via Graft Copolymerization with Methyl Methacrylate

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Thi Nhan Nguyen ◽  
Hieu Nguyen Duy ◽  
Dung Tran Anh ◽  
Thuong Nghiem Thi ◽  
Thu Ha Nguyen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Graft Copolymer ◽  
Graft Copolymerization ◽  
Graft Copolymers ◽  
Thermal And Mechanical Properties ◽  
H Nmr ◽  
Tert Butyl Hydroperoxide ◽  
Deproteinized Natural Rubber

In this study, we investigated the improvement of the thermal and mechanical properties of Vietnam deproteinized natural rubber (DPNR) via graft copolymerization of methyl methacrylate (MMA). The graft copolymerization was achieved successfully in latex stage using tert-butyl hydroperoxide (TBHPO) and tetra-ethylenepentamine (TEPA) as radical initiators at 30°C. By grafting with various MMA feeds and initiator concentration of 6.6×10−5 mol/g-rubber, the highest grafting efficiency and conversion were achieved at MMA of 15 wt.% per kg of rubber, 68% and 90%, respectively. The structure of grafted copolymers was characterized by 1H NMR, FTIR-ATR, and GPC, and thermal properties were investigated through DSC and TGA measurements. These showed that graft copolymers were more stable and rigid than DPNR. Storage modulus (G′) of graft copolymer was found to double that of DPNR, which contributed to the formation of graft copolymer. After sulfur vulcanization, the mechanical properties of DPNR-graft-PMMA, such as tensile strength, tear strength, and hardness, were improved significantly. Curing behaviors of the graft copolymers were found to be remarkably better than virgin DPNR.

Mechanism of graft copolymerization of styrene onto deproteinized natural rubber

2008 ◽  
Vol 286 (4) ◽  
pp. 411-416 ◽  
Author(s):  
Nanthaporn Pukkate ◽  
Yoshimasa Yamamoto ◽  
Seiichi Kawahara
Keyword(s):  
Natural Rubber ◽  
Graft Copolymerization ◽  
Deproteinized Natural Rubber

The Effect of Styrene Monomer in the Graft Copolymerization of Arcylonitrile onto Deproteinized Natural Rubber

2015 ◽  
Vol 6 (7) ◽  
pp. 1164 ◽  
Author(s):  
Tuti Indah Sari ◽  
Asep Handaya Saputra ◽  
Setijo Bismo ◽  
Dadi R. Maspanger ◽  
Adi Cifriadi
Keyword(s):  
Natural Rubber ◽  
Graft Copolymerization ◽  
Styrene Monomer ◽  
Deproteinized Natural Rubber

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

Rheological and thermal properties of purified raw natural rubber

2021 ◽  
Author(s):  
Dalisiane Elodie Njeumen Nkayem ◽  
Angel Alegria ◽  
Silvia Arrese-Igor ◽  
Njukeng Jetro Nkengafac
Keyword(s):  
Thermal Properties ◽  
Natural Rubber

Novel membranes from physico-chemically modified deproteinized natural rubber latex: development, characterisation and drug permeation

2018 ◽  
Vol 42 (17) ◽  
pp. 14179-14187
Author(s):  
Janisha Jayadevan ◽  
G. Unnikrishnan
Keyword(s):  
Drug Release ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Drug Permeation ◽  
Chemically Modified ◽  
Blend Membranes ◽  
Deproteinized Natural Rubber

Novel blend membranes from physico-chemically modified deproteinized natural rubber latex for drug release applications.

Thermal Properties and Morphology of Compatible Poly(ethylene oxide)/Natural Rubber-graft -poly(methyl methacrylate) Blends

2018 ◽  
Vol 382 (1) ◽  
pp. 1800083 ◽  
Author(s):  
Nurul F. A. Zainal ◽  
Margarethe Hein ◽  
Volker Abetz ◽  
Ab M. M. Ali ◽  
Chin H. Chan
Keyword(s):  
Thermal Properties ◽  
Ethylene Oxide ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene
Sign in / Sign up

Export Citation Format

Share Document