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Dilute solution and melt viscosities of two poly(arylene ether ketones) were compared. One polymer contained all para linkages in the backbone and the other contained one meta linkage per repeat unit. Molecular dimensions were shown to agree with calculated values and entanglement spacings could...
A new poly(arylene ether ketone) polymer (PAE) has been synthesized. This polymer was prepared from the reaction of 1, 3-bis(4-fluorobenzoyl)benzene with 2, 2-bis(4-hydroxyphenyl)propane. Dynamic rheological measurements were performed on a series of six PAE polymer melts with weight average...
3,6-Diphenylpyromellitic dianhydride (DPPMDA) has been synthesized from 2,5-diphenyl-3,4-bis(4-methoxyphenyl)cyclopentadiene-1-one and dimethyl acetylenedicarboxylate. The monomer was polymerized with 11 aromatic diamines in refluxing m-cresol containing isoquinoline to afford two new series of...
The phase behaviour of blends of poly(acrylonitrile:methyl acrylate: butadiene) (B210) and polyolefins modified with polar groups, either by copolymerization or grafting reactions, was examined using differential scanning calorimetry (DSC). Enhanced or complete miscibility was attained by...
The concept of stabilizing the reactive end-groups in conventional polyimides has been investigated in a novel system. The polyimide investigated was synthesized from 4, 4′-hexafluoroisopropylidenebis (phthalic anhydride) (6F) and 2, 2′-bis(4-(4-aminophenoxyphenyl)) hexafluoro-propane...
The poly(arylene ether ketone) from the reaction of 1, 3-bis(4-fluoro-benzoyl)benzene with 2, 2-bis(4-hydroxyphenyl)propane was prepared at six different molecular weights ranging from Mw=9600 to 113, 000 g/mole. Selected physical and mechanical properties of these six different polymers were...
Carbon fibre surface properties have been studied by measuring the electrochemical behaviour of the hexacyano ferrate (III)/ferrate(II) couple using carbon fibre brush electrodes. Courtaulds Grafil polyacrylonitrile (PAN) based fibres have been studied that have been subjected to different...
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