Study on grafting of different types of acrylic monomers onto natural rubber by γ-rays

Dafader, N. C.; Haque, M. E.; Akhtar, F.; Ahmad, M. U.

doi:10.1016/j.radphyschem.2005.04.002

Cited by 23 publications

(7 citation statements)

References 4 publications

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“…H deformation, respectively [20]. The new transmittance peak around 3440 cm , corre-sponding to the -OH group, was observed in the sample prepared in the system containing TiO2 powder, and the peak intensity increased with the increase of TiO2 content from 0 to 2.0 phr.…”

Section: Effect Of the Tio 2 Powder Content On The Mw And The Structure Of Spnr And Flnrmentioning

confidence: 87%

“…FTIR spectra of SPNR and the samples are shown in Figure 5. The important characteristic bands for NR appear around 1664 and 836 cm −1 , assigned to the C=C stretching and =C-H deformation, respectively [20]. The new transmittance peak around 3440 cm −1 , corresponding to the -OH group, was observed in the sample prepared in the system containing TiO 2 powder, and the peak intensity increased with the increase of TiO 2 content from 0 to 2.0 phr.…”

Section: Effect Of the Tio 2 Powder Content On The Mw And The Structure Of Spnr And Flnrmentioning

confidence: 91%

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Hydroxyl-Terminated Saponified Natural Rubber Based on the H2O2/P25-TiO2 Powder/UVC-Irradiation System

et al. 2021

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Natural rubber (NR), a long-chain hydrocarbon polymer mostly consisting of cis-1,4-polyisoprene units, has a high molecular weight (MW) and viscosity, enabling it to show excellent physical properties. However, NR has no reactive functional group, making it difficult to react with other molecules, especially in manufacturing processes. The functionalized low-molecular-weight NR (FLNR) is a requirement to disperse ingredients into the rubber adequately. Here, the FLNR was prepared by a photochemical degradation process under UVC-irradiation in the presence of H2O2 using P25-titanium oxide (TiO2) powder as a photocatalyst. The optimum condition for the preparation of FLNR was the use of 2.0 g of TiO2 powder per 100 g of rubber and H2O2 at 20% w/w under UVC-irradiation for 5 h. The hydroxyl groups were found on the NR chains due to the chain-scission of polyisoprene chains and hydroxyl radicals in the system. The weight average MW of NR decreased from 12.6 × 105 to 0.6 × 105 gmol−1, while the number average MW decreased from 3.3 × 105 to 0.1 × 105 gmol−1.

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Section: Effect Of the Tio 2 Powder Content On The Mw And The Structure Of Spnr And Flnrmentioning

confidence: 87%

Section: Effect Of the Tio 2 Powder Content On The Mw And The Structure Of Spnr And Flnrmentioning

confidence: 91%

Hydroxyl-Terminated Saponified Natural Rubber Based on the H2O2/P25-TiO2 Powder/UVC-Irradiation System

et al. 2021

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“…The methods for the preparation of graed rubber include thermal gra copolymerization [17][18][19][20] and irradiation graing polymerization. [21][22][23] Second, the generation of the in situ silica in the rubber matrix by the sol-gel reaction of TEOS is another effective technology, and this technology has been used in various rubber forms, such as solid rubber, 24,25 rubber latex 26,27 and rubber solution. [28][29][30] Third, combining the graed rubber with sol-gel technology using TEOS to improve the properties of silica/rubber compounds is the most effective method of all.…”

Section: Introductionmentioning

confidence: 99%

Effects of octamethylcyclotetrasiloxane grafting and in situ silica particle generation on the curing and mechanical properties of a styrene butadiene rubber composite

Chen

Zhang

2019

RSC Adv.

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The reinforcement of octamethylcyclotetrasiloxane (D 4 ) grafted styrene butadiene rubber ) with in situ generated silica was performed using the sol-gel reaction of tetraethoxysilane (TEOS) in latex. The characterization of SBR-g-D 4 and in situ generated silica reinforced SBR-g-D 4 was investigated by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The grafting efficiency of the styrene butadiene rubber (SBR) was determined by a gravimetric method. It was found that the constant silicon content and the grafting efficiency of SBR were 1.72% and 0.13 wt% when the weight ratio of D 4 to SBR was 0.20. The effects of the D 4 and in situ generated silica content on the curing characteristics, mechanical properties and morphology of SBR latex were investigated. The mechanical properties of in situ generated silica reinforced vulcanizates were improved significantly compared to raw SBR vulcanizate when the in situ generated silica content was 18.05%. Compared with silica reinforced SBR-g-D 4 , the tensile strength, wet skid resistance and rolling resistance of the in situ generated silica reinforced SBR-g-D 4 were better. This is because of the higher crosslinking degree in the SBR-g-D 4 matrix and the strong chemical bond between SBR-g-D 4 molecular chains and in situ generated silica. Scanning electron microscopy analysis revealed good silica filler dispersion in all the reinforced SBR-g-D 4 vulcanizates.

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“…These qualities make irradiation the method of choice in the synthesis of hydro gels. When a polymer in aqueous solution is subjected to gamma irradiation, three main reactive species; hydrated electrons, hydroxyl radicals and hydrogen atoms, are formed [6][7]. Hydroxyl radicals have been shown to be the main species responsible for reactivity transfer from water to the polymer chains.…”

Section: Introductionmentioning

confidence: 99%

Chemical and Physical Properties of Cassava Starch–CM-Chitosan–Acrylic Acid Gel Copolymerization by Gamma Irradiation

Rekso

2014

Indones. J. Chem.

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Study on grafting of different types of acrylic monomers onto natural rubber by γ-rays

Cited by 23 publications

References 4 publications

Hydroxyl-Terminated Saponified Natural Rubber Based on the H2O2/P25-TiO2 Powder/UVC-Irradiation System

Hydroxyl-Terminated Saponified Natural Rubber Based on the H2O2/P25-TiO2 Powder/UVC-Irradiation System

Effects of octamethylcyclotetrasiloxane grafting and in situ silica particle generation on the curing and mechanical properties of a styrene butadiene rubber composite

Chemical and Physical Properties of Cassava Starch–CM-Chitosan–Acrylic Acid Gel Copolymerization by Gamma Irradiation

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