tailieunhanh - Graft copolymerization of methyl methacrylate and vinyltriethoxysilane onto natural rubber

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. | JST Engineering and Technology for Sustainable Development Volume 31 Issue 4 October 2021 055-060 Graft Copolymerization of Methyl Methacrylate and Vinyltriethoxysilane onto Natural Rubber Phản ứng đồng trùng hợp ghép metyl metacrylat và vinyltriethoxysilane lên cao su thiên nhiên Nghiem Thi Thuong Dao Van Huong School of Chemical Engineering Hanoi University of Science and Technology Hanoi Vietnam Email Abstract 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. Keywords Natural rubber methyl methacrylate vinyltriethoxysilane graft copolymerization tensile property. Tóm tắt Trong nghiên cứu này quá trình tổng hợp và đặc trưng cao su ghép với metyl metacrylat MMA và vinyltriethoxysilane VTES được tiến hành. Quá trình đồng trùng hợp của metyl metacrylate được tiến hành ở trạng thái latex sau đó thêm vinyltriethoxysilanes vào trong quá trình ghép của MMA. Phổ hồng ngoại và phổ cộng hưởng từ hạt nhận được sử dụng để phân tích cấu trúc của cao su ghép và định lượng hiệu suất chuyển hóa và hiệu suất ghép của MMA. Kết quả cho thấy poly methyl methacrylate PMMA và hạt silica PVTES được tạo ra trong cao su ghép NR-graft-PMMA-PVTES. Hiệu suất chuyển hóa của MMA đạt khoảng 90-100 trong khi đó hiệu suất ghép của MMA không

• Hoá dầu
• Natural rubber
• Methyl methacrylate
• Graft copolymerization
• Tensile property
• Silica particles
• Journal of Science and Technology
• Synthesis of hydroxyl terminated liquid natural rubber
• Hydroxyl terminated liquid natural rubber
• Deproteinized natural rubber
• Oxidative depolymerization of NR
• Vietnam Journal of Science and Technology
• Silica and black carbide
• Synthetic styrene butadiene rubber
• The rubber blended on natural rubber
• The mechanical – physical properties
• Production of natural rubber
• Economic development of Tripura
• Natural rubber in India
• Second largest contributor
• Rubber growers of Tripura
• Epoxidized natural rubber and the wood coated
• The wood coated
• Epoxidized natural rubber
• Epoxidized natural rubber silica
• In situ nanosilica
• Silica reinforced natural rubber
• NR matrix
• Effect of some experimental factors
• Preparation of liquid natural rubber
• Liquid natural rubber
• Pphotochemical depolymerization of natural rubber
• Degradation of deproteinized natural rubber
• Gordonia sp
• isolated
• Enrichment consortia
• Decomposing deproteinized natural rubber
• Removal of protein from natural rubber
• Pilot scale toward production
• Low protein rubber gloves
• The lowest nitrogen content
• Blends based
• Poly(vinyl chloride)
• Nitrile butadiene rubber
• Natural rubber and polyethylene
• Preparation of blends based
• Carbon black
• Sulfate barium
• Rubber nanocomposites
• Ethylene propylene diene monomer
• Brabender internal mixer
• The effect of leather fibers
• Vulcanization behavior of natural rubber
• Natural rubber latex
• Grinding waste leather scraps of Vietnam
• Vietnam Journal of Chemistry
• Investigation of cure and mechanical properties
• Deproteinized natural rubber g poly methyl methacrylatec
• Hardness and tear strength
• Characterization of commercial natural rubber purified with transesterification
• Commercial natural rubber purified
• Nuclear magnetic resonance
• The assignments of 1H NMR signals
• Fourier transform infrared
• Oxidative chain scission of NR
• Hydrogen peroxide
• Sodium nitrite
• Summary of Doctoral thesis
• Summary of Environmental engineering Doctoral thesis
• Treatment of natural rubber processing wastewater
• Natural rubber processing wastewater
• Integrated physicochemical
• Biological processes
• Polyaniline blend
• Compatibility of epoxidized natural rubber
• Polyaniline blends
• Environmental engineering
• Low molecular weight
• Hydroxyethyl cellulose to extract proteins in natural rubber latex
• Sodium dodecyl sulfate
• The pre centrifugation latex
• Bài viết khoa học
• Tạp chí Khoa học Công nghệ Việt Nam
• Anti vibration rubber
• Engine mounts
• Vietnam commercial natural rubber
• Gel content
• Non rubber components
• Characterization of structure
• Rubbers is carried
• Acetone extraction
• FT IR spectroscopy
• The Journal of Agriculture and Development
• Tạp chí Nông nghiệp và Phát triển
• SARIMA model
• Natural rubber price
• Rubber price forecast
• Root Mean Square Error (RMSE)
• Rubber materials
• Thermochromic pigment
• Functional rubber compounds
• Color changing properties
• BMC Genomics
• Taraxacum kok saghyz
• Russian dandelion
• Promising alternative species
• High quality natural rubber
• Tạp chí khoa học
• A risk analysis of smallholder rubber production
• Quang Binh province
• Smallholder rubber production
• The increase in natural disasters
• The domestic and foreign markets
• Epidemics increases costs