Degradation and stabilization of ethylene-propylene copolymers and their blends: A critical review

Sivaram, Swaminathan; Singh, R. P.

doi:10.1007/bfb0018002

Cited by 21 publications

(1 citation statement)

References 65 publications

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“…This kind of observation was also reported by López et al [17] for their PVA nanocomposites prepared with CoFe 2 O 4 nanoparticles. The proposed explanation is related to the restrictions in polymer chain mobility and to the reduction of diffusivity of attacking agents within the polymer matrix, both due to the polymer-filler interactions [16,17]. Thus, the nanoparticles may act as a heating barrier.…”

Section: Effect Of Magnetite Concentrationmentioning

confidence: 94%

Effect of magnetic nanoparticles on the thermal properties of some hydrogels

Salinas

Arias²,

Puglia

et al. 2007

Polymer Degradation and Stability

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Section: Effect Of Magnetite Concentrationmentioning

confidence: 94%

Effect of magnetic nanoparticles on the thermal properties of some hydrogels

Salinas

Arias²,

Puglia

et al. 2007

Polymer Degradation and Stability

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Morphology of photodegraded heterophasic ethylene-propylene copolymers

Sarwade

Singh

1999

J. Appl. Polym. Sci.

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ABSTRACT:The morphology of photooxidative degraded films of heterophasic ethylenepropylene copolymer (EPQ-30R) was investigated and compared with isotactic polypropylene and linear low-density polyethylene by scanning electron microscopy. Surface damage caused by polychromatic ultraviolet irradiation ( Ն 290 nm) at 55°C in air is presented in different micrographs. Changes occurring due to the formation of polar groups during photooxidative degradation are discussed. Morphological study of these photodegraded polymer samples show very good correlation with the photodegradation results. The rate of photooxidation is very fast in case of isotactic polypropylene, compared with polyethylene and ethylene-propylene copolymers.

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Synthesis of new polymeric hindered amine light stabilizers: Performance evaluation in styrenic polymers

Singh

Patwa

Desai

et al. 2003

J of Applied Polymer Sci

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Polymeric hindered amine light stabilizers (HALSs), in which the HALS functionality was attached to the terminal isocyanate chain end of poly(styryl-co-styryl isocyanate), were synthesized by a two-step process. First, cinnamoyl azide was prepared and copolymerized with styrene by a free-radical copolymerization method. Polymeric low-molecular-weight and high-molecular-weight 2,2,6,6-tetramethyl-4-pipridinol-graft-poly(styryl-co-styryl isocyanate) and 4-amino-2,2,6,6-tetramethyl piperidine-graft-poly-(styryl-co-styryl isocyanate) were synthesized by a grafting method. The photodegradation and stabilization of different grades of high-impact polystyrene (HIPS) were studied at 55°C in air at different time intervals, and the photostabilizing efficiency of polymeric HALSs was compared with conventional light stabilizers, such as 2,2,6,6-tetramethyl-4-pipridinol and bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate. Polymeric HALSs showed significant improvements in the photostabilization of HIPS. The solubility and diffusion coefficient of polymeric HALSs were studied. The morphological changes in HIPS caused by photooxidation were also studied.

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Degradation and stabilization of ethylene-propylene copolymers and their blends: A critical review

Cited by 21 publications

References 65 publications

Effect of magnetic nanoparticles on the thermal properties of some hydrogels

Effect of magnetic nanoparticles on the thermal properties of some hydrogels

Morphology of photodegraded heterophasic ethylene-propylene copolymers

Synthesis of new polymeric hindered amine light stabilizers: Performance evaluation in styrenic polymers

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