Rheological behavior of brominated isobutylene-co-paramethylstyrene: effect of fillers, oil and blending with EPDM.(Abstract): An article from: Polymer Engineering and Science
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PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB0008G15LO
ISBN-13978B0008G15L0
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This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on December 1, 2002. The length of the article is 5792 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: The melt flow properties of unfilled and filled brominated isobutylene-co-paramethylstyrene (BIMS) were measured by means of a capillary viscometer at three different temperatures (90[degrees]C, 110[degrees]C and 130[degrees]C) and four different shear rates (61, 122, 245 and 306 [s.sup.-1]). The effect of addition of EPDM rubber on melt flow properties of unfilled BIMS was also studied. Evaluation of the processability was done by measuring the extrudate roughness (ER) of the extrudates obtained from the MPT. The viscosity of the systems decreased with the shear rate, indicating their pseudoplastic or shear thinning nature. As expected, the viscosity of BIMS increased with the addition of fillers and decreased with the addition of oil. For the neat systems, viscosity increased with the addition of EPDM, and the blends showed a positive deviation, indicating interdiffusion of the polymer chains across the phase boundaries. The activation energy of the filled systems at constant filler loading increased with i ncreasing filler surface area (N330 > N550 > N774, each at 30 phr loading), and filler loading (50 > 30 > 10 phr, for N330) and decreased with the addition of oil (2.5 > 5.0 > 7.5 phr, for system containing 30 phr of N330). The silica filled system showed a higher activation energy and ER than the carbon black-filled systems. With addition of N330 and N550 carbon blacks to BIMS, the extrudate roughness (ER) decreased, whereas it increased with the addition of N774 carbon black. With an increase in filler loading, ER initially increased and then decreased as compared to the neat system. For the filled systems, ER initially decreased up to 5 phr of oil, beyond which it increased.
Citation Details
Title: Rheological behavior of brominated isobutylene-co-paramethylstyrene: effect of fillers, oil and blending with EPDM.(Abstract)
Author: Bhuwneesh Kumar
Publication:Polymer Engineering and Science (Refereed)
Date: December 1, 2002
Publisher: Society of Plastics Engineers, Inc.
Volume: 42 Issue: 12 Page: 2306(11)
Article Type: Abstract
Distributed by Thomson Gale
From the author: The melt flow properties of unfilled and filled brominated isobutylene-co-paramethylstyrene (BIMS) were measured by means of a capillary viscometer at three different temperatures (90[degrees]C, 110[degrees]C and 130[degrees]C) and four different shear rates (61, 122, 245 and 306 [s.sup.-1]). The effect of addition of EPDM rubber on melt flow properties of unfilled BIMS was also studied. Evaluation of the processability was done by measuring the extrudate roughness (ER) of the extrudates obtained from the MPT. The viscosity of the systems decreased with the shear rate, indicating their pseudoplastic or shear thinning nature. As expected, the viscosity of BIMS increased with the addition of fillers and decreased with the addition of oil. For the neat systems, viscosity increased with the addition of EPDM, and the blends showed a positive deviation, indicating interdiffusion of the polymer chains across the phase boundaries. The activation energy of the filled systems at constant filler loading increased with i ncreasing filler surface area (N330 > N550 > N774, each at 30 phr loading), and filler loading (50 > 30 > 10 phr, for N330) and decreased with the addition of oil (2.5 > 5.0 > 7.5 phr, for system containing 30 phr of N330). The silica filled system showed a higher activation energy and ER than the carbon black-filled systems. With addition of N330 and N550 carbon blacks to BIMS, the extrudate roughness (ER) decreased, whereas it increased with the addition of N774 carbon black. With an increase in filler loading, ER initially increased and then decreased as compared to the neat system. For the filled systems, ER initially decreased up to 5 phr of oil, beyond which it increased.
Citation Details
Title: Rheological behavior of brominated isobutylene-co-paramethylstyrene: effect of fillers, oil and blending with EPDM.(Abstract)
Author: Bhuwneesh Kumar
Publication:Polymer Engineering and Science (Refereed)
Date: December 1, 2002
Publisher: Society of Plastics Engineers, Inc.
Volume: 42 Issue: 12 Page: 2306(11)
Article Type: Abstract
Distributed by Thomson Gale
