Electron beam initiated modification of acrylic elastomer in presence of polyfunctional monomers

Vijayabaskar, V.; Bhattacharya, Sumanta; Tikku, V.K.; Bhowmick, Anil K.

doi:10.1016/j.radphyschem.2003.11.006

Cited by 39 publications

(35 citation statements)

References 14 publications

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“…Presence of radiation sensitizers would allow for optimal crosslinking to be achieved at a lower absorbed dose of irradiation (Burillo et al, 2001, Vijayabaskar et al, 2004, Ng et al, 2014. Among all the three radiation sensitizers, HVA2 recorded p0/q0 values above 1 for RTR and 50RTR/5APS…”

Section: Gel Contentmentioning

confidence: 99%

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Improving the properties of reclaimed waste tire rubber by blending with poly(ethylene‐co‐vinyl acetate) and electron beam irradiation

Ramarad

Ratnam

Khalid

et al. 2014

J of Applied Polymer Sci

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Non-degradable waste tire generation around the world is growing at an alarming rate. Diversifying the recycling route of these waste tires is essential to solve the problem. One way is to incorporate them into polymers and convert them into new products. However, incorporation of ground tire rubber into thermoplastics has been hampered due to lack of toughness and adhesion between phases. To address the issue, this study utilized reclaimed waste tire rubber (RTR) instead; and evaluated the properties of RTR and poly(ethyleneco-vinyl acetate) (EVA) blends. The properties of the RTR/EVA blends were further enhanced by compatibilization and electron beam irradiation.Processing, mechanical, thermal and dynamic mechanical properties of RTR were tremendously improved by blending with EVA. However, the interfacial adhesion was found to lack in the blends. Compatibilization by reactive, physical and combination strategies were explored utilizing (3-Aminopropyl)triethoxy silane (APS), liquid styrene butadiene rubber (LR) and maleated EVA (MAEVA), respectively. APS and MAEVA were found to be the most and least favourable compatibilizer, respectively. Apart from functioning as reactive compatibilizer, APS also reclaimed the RTR phase further. These lead to improved dispersion of smaller RTR phase in EVA matrix and enhanced the interfacial adhesion.Electron beam irradiation revealed the presence of radical stabilizing and scavenging additives within RTR which retards the crosslinking process in RTR and RTR/EVA blends. Though chain scissions were predominant; study showed the replacement of S-S and S-C bonds with stronger and stiffer C-C bonds ensures the retention of RTR and RTR/EVA blends properties upon irradiation.Compatibilization of RTR/EVA blend by APS (50RTR/5APS) also improved the crosslinking efficiency. However, the blend still suffered from oxidative degradation from irradiation in air. Radiation sensitizers, trimethylol propane triacrylate (TMPTA), tripropylene glycol diacrylate (TPGDA) and N,N-1,3Phenylene Bismaleimide (HVA2), were used to accelerate the irradiation induced crosslinking in RTR and 50RTR/5APS blends. Presence of radiation sensitizers leads to simultaneous improvement in toughness and tensile strength of RTR and 50RTR/5APS blends. Elastic capacity of RTR phase was restored and interfacial adhesion enhanced in the presence of radiation sensitizers.iii

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Section: Gel Contentmentioning

confidence: 99%

“…These are due to denser crosslink formations by trifunctional TMPTA compared to difunctional TPGDA (Vijayabaskar et al, 2004).…”

Section: Elongation At Breakmentioning

confidence: 99%

Improving the properties of reclaimed waste tire rubber by blending with poly(ethylene‐co‐vinyl acetate) and electron beam irradiation

Ramarad

Ratnam

Khalid

et al. 2014

J of Applied Polymer Sci

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“…The time required for G to reach the steady-state value on applying the field is called the induction time, τ ind , and the time required for G to decay towards its steady-state value when the electric field is turned off is called the recovery time, τ rec . [27,28] Figure 5 the temporal response of AR71/PT 8 at electric field strengths of 0.1 and 2.0 kV/mm, respectively. After some initial period with the electric field on and off, the AR71/PT 8 appears to be a reversible system at both of the electric field strengths.…”

Section: Sem Analysismentioning

confidence: 99%

Electrorheology and characterization of acrylic rubber and lead titanate composite materials

Tangboriboon

Sirivat

Wongkasemjit

2008

Applied Organom Chemis

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Oxide one-pot synthesis was used to synthesize a polymer precursor to lead titanate, PbTiO 3 . Perovskite lead titanate, PbTiO 3 , was synthesized via the sol-gel process. The dielectric constant, electrical conductivity and loss tangent of our acrylic rubber (AR71)-lead titanate (PT) composite material (AR/PT 8) were 14.15, 2.62 × 10 −7 / m, and 0.093, respectively, measured at 27• C and 1000 Hz. SEM micrographs of composites between the AR71 elastomer and PbTiO 3 showed that the particles were reinforced within the matrix. The electrorheological properties of the AR71/PT composites were investigated as functions of electric field strength from 0 to 2 kV/mm and PbTiO 3 particle volume fraction. The storage modulus increased linearly with particle volume fraction, with or without an electric field. Without an electric field, the particles merely acted as a filler to absorb or store additional stress. With the electric field on, particle-induced dipole moments were generated, leading to interparticle interactions, and thus a substantial increase in storage modulus. With PbTiO 3 particle volume fractions as small as 10 −4 embedded in the elastomer matrix, the modulus increased by nearly a factor of 2 as the electric field strength varied from 0 to 2 kV/mm.

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“…Vijayabaskar (2004) Figura 10 -Geração de macroradical e conseqüente ligação tipo X em ACM (Vijayabaskar, 2004).…”

Section: Alterações Estruturais Em Poliacrilatos (Acm)unclassified

“…Figura 12 -Formação de ligação tipo C-O-C em ACM (Vijayabaskar, 2004). Tabela 2 -Pico de absorbância do espectro IR para borracha ACM (Vijayabaskar, 2004 …”

Section: Alterações Estruturais Em Poliacrilatos (Acm)unclassified

Caracterização da relaxação por compressão de borracha acrílica irradiada.

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Electron beam initiated modification of acrylic elastomer in presence of polyfunctional monomers

Cited by 39 publications

References 14 publications

Improving the properties of reclaimed waste tire rubber by blending with poly(ethylene‐co‐vinyl acetate) and electron beam irradiation

Improving the properties of reclaimed waste tire rubber by blending with poly(ethylene‐co‐vinyl acetate) and electron beam irradiation

Electrorheology and characterization of acrylic rubber and lead titanate composite materials

Caracterização da relaxação por compressão de borracha acrílica irradiada.

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