Improving properties of modified acrylic sheet via addition of graft natural rubber

Hinchiranan, Napida; Suppaibulsuk, Bunthita; Promprayoon, S.; Prasassarakich, Pattarapan

doi:10.1016/j.matlet.2006.12.069

Cited by 17 publications

(12 citation statements)

References 13 publications

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“…The new peak at 3.2-3.4 ppm seen in 1 H-NMR spectrum of HTNR was due to the hydoxyl group. The peak at d ¼ 60.84 ppm and 64.52 ppm characteristic of a-carbon of allylalcohol in 13 C-NMR spectra illustrated in Figure 3. indicated the terminal hydroxyl group in the product.…”

Section: The Molecularmentioning

confidence: 99%

Physical Properties of Poly(lactic acid)/Hydroxyl Terminated Natural Rubber Blends

Srisuwan

Ruksakulpiwat

Chumsamrong

2015

Macromolecular Symposia

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Summary The objective of the study is to use hydroxyl‐terminated natural rubber (HTNR) as the toughening modifier for poly(lactic acid) (PLA). Photochemical degradation of natural rubber by ultraviolet radiation from high pressure mercury vapor lamp was used as depolymerization and hydroxylation of natural rubber. Molecular weight of HTNR was 25,000 (trueM‾n) and estimation of hydroxyl number of HTNR according to ASTM D4274‐11 was 2.04 mg KOH/g. The present of hydroxyl group was confirmed by FT‐IR, 1H‐NMR and 13C‐NMR spectrum. HTNR was blended with PLA in the ratio of 100/0, 100/3, 100/5, 100/10, and 100/15. Tensile and impact tests were carried out according to ASTM D638 and D256 respectively. It was found that tensile strength and tensile modulus of the PLA/HTNR blends were not significantly decreased whereas elongations at break were increased up to about 9 times compared with neat PLA. For impact properties, the results showed that impact strength of PLA was significantly increased up to 4 times with an addition of 10 wt% HTNR. SEM micrographs of the blends showed well disperse of HTNR particles and the occurrence of ductile fracture.

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Section: The Molecularmentioning

confidence: 99%

Physical Properties of Poly(lactic acid)/Hydroxyl Terminated Natural Rubber Blends

Srisuwan

Ruksakulpiwat

Chumsamrong

2015

Macromolecular Symposia

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“…The inclusion of the HNR modifier showed a much greater increase in the tensile strength with increasing ST levels up to 20% (w/w) and essentially the same rate of decreased tensile strength with increasing ST concentration from 20% to 40% (w/w). Consequently, HNR modified MMA-ST copolymer sheets were always of a higher tensile strength than the corresponding nonmodified copolymer sheets at the same MMA-ST content due to the higher toughness that results from the addition of an amorphous rubbery phase of HNR modified copolymer sheets [15,16].…”

Section: Effect Of St Contentmentioning

confidence: 99%

Poly(Methyl Methacrylate-co-Styrene) Modified with Hydrogenated Natural Rubber

Thawornwisit

Charmondusit

Rempel

et al. 2009

Journal of Elastomers & Plastics

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The mechanical properties of brittle polymers are improved by blending with rubbers. Due to C=C in the rubber structure, polymer/rubber blends have poor thermal and oxidative resistance. In this research, the mechanical and physical properties including the morphology of poly(methyl methacrylate-co-styrene) sheet modified by blending with hydrogenated natural rubber were investigated. The optimum styrene content in copolymer sheets for improving the mechanical properties was 20% (w/w) and inclusion of hydrogenated natural rubber at 1% (w/w) exhibited a higher thermal resistance. This implies that hydrogenated natural rubber can be used as an impact modifier and thermal resistance improver for acrylic plastics

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“…Graft copolymerization is an attractive technique to modify NR in order to provide new NR products, upgrade its physical properties and extend its uses . Graft copolymerization allows desirable properties of different polymers to be combined in grafting products that inherit properties from both polymers . Devi et al .…”

Section: Introductionmentioning

confidence: 99%

“…2 Graft copolymerization allows desirable properties of different polymers to be combined in grafting products that inherit properties from both polymers. 3 Devi et al successfully synthesized oxidized NR grafted with 2-hydroxyethyl methacrylate in order to improve its engineering properties and biocompatibility. 4 George et al found that the modulus of films increased with methyl methacrylate (MMA) content on NR backbones.…”

Section: Introductionmentioning

confidence: 99%

Influences of the grafting percentage of natural rubber‐graft‐poly(2‐hydroxyethyl acrylate) on properties of its vulcanizates

Chueangchayaphan

Tanrattanakul

et al. 2018

Polymer International

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The graft copolymerization of 2‐hydroxyethyl acrylate (HEA) monomer onto natural rubber (NR) latex was successful using cumene hydroperoxide and tetraethylene pentamine as redox initiators. The grafting of poly(2‐hydroxyethyl acrylate) (PHEA) on the NR particles was confirmed by Fourier transform infrared spectroscopy, 1H NMR spectroscopy and TEM. The NR‐g‐PHEA with various grafting percentages (0%, 8.7%, 14.3% and 18.7%) was compounded on a two‐roll mill with a sulfur vulcanization system. The effects of grafting percentage on the cure characteristics, dielectric properties, thermal properties and physical properties of NR‐g‐PHEA vulcanizates were investigated. It was found that increased grafting caused NR‐g‐PHEA vulcanizates to have reduced water contact angle, scorch time and cure time, while the dielectric constant and dissipation factor increased. The NR‐g‐PHEA vulcanizate with 8.7% grafting exhibited the highest delta torque (MH − ML), crosslink density, tensile strength, moduli at 100%, 200% and 300% strains, and hardness, with insignificant loss of elongation at break in comparison to the other cases. © 2018 Society of Chemical Industry

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Improving properties of modified acrylic sheet via addition of graft natural rubber

Cited by 17 publications

References 13 publications

Physical Properties of Poly(lactic acid)/Hydroxyl Terminated Natural Rubber Blends

Physical Properties of Poly(lactic acid)/Hydroxyl Terminated Natural Rubber Blends

Poly(Methyl Methacrylate-co-Styrene) Modified with Hydrogenated Natural Rubber

Influences of the grafting percentage of natural rubber‐graft‐poly(2‐hydroxyethyl acrylate) on properties of its vulcanizates

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