Back SearchTitle: STRATEGIES FOR ACHIEVING MICROCELLULAR LDPE FOAMS IN EXTRUSION
Page Range: p.1-18
Author(s): Park C B; Lee P C; Wang J; Padareva V
File size: 334K
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Issue Year: cp
Volume: 25
Issue No: No. 1
Abstract
Process design for the production of microcellular foams using low density polyethylene (LDPE) in extrusion with supercritical carbon dioxide as blowing agent was investigated. The effects of using blends of LDPE with small proportions of polystyrene and/or a nucleating agent, or of crosslinking LDPE, were studied and the results are discussed in terms of process optimisation. 43 refs.
Title: FOAMABILITY OF THERMOPLASTIC VULCANIZATES (TPVs) WITH CARBON DIOXIDE AND NITROGEN
Page Range: p.19-33
Author(s): Kim S G; Park C B; Kang B S; Sain M
File size: 411K
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Issue Year: cp
Volume: 25
Issue No: No. 1
Abstract
The foamability of a thermoplastic vulcanisate in extrusion was investigated using carbon dioxide and nitrogen as physical blowing agents. The effects of blowing agent content and processing conditions on expansion behaviour, cell-number density and foam structure were studied by volume expansion and cell population measurements and SEM, and the results are discussed. 26 refs.
Title: SYNTHESIS OF RIGID POLYURETHANE FOAMS FROM RECYCLED POLY(ETHYLENE TEREPHTHALATE) WASTE
Page Range: p.35-48
Author(s): Abdel Azim A A; Atta A M; El-Ghazawy R A
File size: 199K
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Issue Year: cp
Volume: 25
Issue No: No. 1
Abstract
The recycling of poly(ethylene terephthalate) waste by glycolysis using trimethylolpropane or pentaerythritol in the presence of manganese acetate as catalyst under various processing conditions was investigated. The synthesis of rigid polyurethane foams by reaction of the resulting hydroxyoligomers with toluene diisocyanate, and their characterisation by compressive and flexural strength, density, open and closed cell contents and oxygen index, is discussed. 32 refs.