Back SearchTitle: COMPRESSION MOULDING OF POLYPROPYLENE FOAMS AND THEIR PROPERTIES
Page Range: p.217-233
Author(s): Mechraoui A; Barzegari M R; Riedl B; Rodrigue D
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)Journal: Cellular Polymers
Issue Year: cp
Volume: 27
Issue No: No.4
Abstract
The fabrication of polypropylene foams by compression moulding using various proportions of azodicarbonamide as chemical blowing agent, and the characterisation of the products by SEM (cell size, cell density and skin thickness), density profile, foam density, tensile and flexural moduli, is described. The effects of blowing agent concentration on mechanical and morphological properties of the foams are discussed in comparison with the predictions of models based on foam density, skin thickness and foam density profile. 33 refs.
Title: A SUMMARY OF WORK CARRIED OUT BY EUROPUR INTO EXTRACTABLE MATERIALS FROM FLEXIBLE POLYURETHANE FOAM
Page Range: p.235-249
Author(s): Hillier K; King D A
File size:
Download the pdf (subscribers only) Buy the pdf (non-subscribers)Journal: Cellular Polymers
Issue Year: cp
Volume: 27
Issue No: No.4
Abstract
A summary of research carried out by the European polyurethane (PU) flexible slabstock manufacturing trade association, EUROPUR, on the determination of extractable materials from flexible PU foam manufactured by reaction of a polyol with an aromatic diisocyanate is presented. The analysis by HPLC of materials extracted from various polyurethanes using a dilute aqueous solution of acetic acid as extractant, and their identification and quantification by GC-MS is discussed in terms of PU foam formulations and in the context of the introduction of a voluntary labelling scheme stipulating maximum allowable levels of some chemicals and metals in certain grades of foam. 12 refs.
Title: GRAPHITIC FOAM WITH HIGH STRENGTH AND HIGH THERMAL CONDUCTIVITY DOPED BY TUNGSTEN
Page Range: p.251-260
Author(s): Wang Y; Cao L; Gao J; Wang Y
File size:
Download the pdf (subscribers only) Buy the pdf (non-subscribers)Journal: Cellular Polymers
Issue Year: cp
Volume: 27
Issue No: No.4
Abstract
The preparation of graphitic foams of high strength and high thermal conductivity by incorporation of various proportions of tungsten particles as dopant into the mesophase pitch precursor followed by graphitisation, and their characterisation by SEM, compressive strength, thermal conductivity, thermal diffusivity and XRD measurements, is described. The effects of dopant content on microstructure, morphology, thermal and mechanical properties of the foams are discussed in terms of the catalytic effects of tungsten on the graphitisation process and promotion of crystallite growth. 15 refs.