Back SearchTitle: INFLUENCE OF CELL SIZE ON RE-ENTRANT TRANSFORMATION OF NEGATIVE POISSON'S RATIO RETICULATED POLYURETHANE FOAMS
Page Range: p.373-385
Author(s): Wang Y-C; Lakes R; Butenhoff A
File size: 168K
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Issue Year: cp
Volume: 20
Issue No: No. 6
Abstract
A laser measurement system is used to provide accurate Poisson's ratio of PU foams at different axial strains.. Three different cell size open cell foams were transformed successfully to negative Poisson's ratio foams via a thermal processing procedure. Optimal parameters according to cell sizes are indicated. 10 refs.
Title: VISCOELASTIC BEHAVIOUR OF ALUMINIUM SILICATE FILLED CLOSED-CELL MICROCELLULAR ETHYLENE-OCTENE COPOLYMER VULCANIZATES: EFFECT OF BLOWING AGENT, TEMPERATURE, FREQUENCY AND STRAIN
Page Range: p.386-402
Author(s): Nayak N C; Tripathy D K
File size: 169K
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Issue Year: cp
Volume: 20
Issue No: No. 6
Abstract
An investigation is reported of the dynamic mechanical response of aluminium silicate filled closed cell microcellular ethylene-octene copolymer (Engage) vulcanisates. The effect of blowing agent, frequency and temperature on dynamic mechanical properties is studied, and the strain-dependent dynamic mechanical properties of microcellular Engage are also investigated. 25 refs.
Title: EFFECT OF MATERIAL FACTORS ON THE DENSITY AND CELL MORPHOLOGY OF CHEMICALLY FOAMED POLYPROPYLENE
Page Range: p.403-416
Author(s): Dixon D; Martin P J; Harkin-Jones E
File size: 123K
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Issue Year: cp
Volume: 20
Issue No: No. 6
Abstract
The effects are assessed of various material factors on the cell morphology and density of extruded expanded PP rod samples, produced using a range of commercial chemical blowing agents. The work is part of a research project into the optimisation of the extrusion and subsequent thermoforming of EPP sheet for food packaging applications. Trials were also carried out to quantify the effects on the foam of additives, such as pigment, sodium benzoate, co-polymer, and regrind, and the grade of polymer used. A design of experiment methodology was adopted for these latter tests. 7 refs.