Polyester composites characterisation

C. Forder, S.P. Armes, A.W. Simpson, C. Maggiore, and M. Hawley, Preparation and characterisation of superparamagnetic conductive polyester textile composites, J. Mater. Chem, 3, 563-569 (1993). 

Confocal Raman microspectroscopy was used to characterise the chemical composition of clearcoats in paint systems. Weathered and unweathered samples of isolated acrylic/melamine and acrylic/urethane clearcoats, polyester urethane clearcoats in weathered and unweathered samples of a complete paint system on plastic, and UV light cured acrylic clearcoats on polycarbonate substrates were studied (149). 

Abstract This chapter describes vegetable oil-based polymer nanocomposites. It deals with the importance, comparison with conventional composites, classification, materials and methods, characterisation, properties and applications of vegetable oil-based polymer nanocomposites. The chapter also includes a short review of polymer nanocomposites of polyester, polyurethanes and epoxies based on different vegetable oils and nanomaterials. The chapter shows that the formation of suitable vegetable oil-based polymer nanocomposite can be considered to be a means of enhancing many of the desirable properties of such polymers or of obtaining materials with an intrinsically new set of properties which will extend their utility in a variety of advanced applications. Vegetable oil-based shape memory hyperbranched polyurethane nanocomposites can be sited as an exampie of such advanced products. 

The processability of a resin system determines to what extent it can be used in a variety of processes. Within this field are such factors as viscosity, shelf life, cure regime, etc. The processability and the thermo-mechanical performance of a resin system are the two factors which most effectively characterise resin systems used in composites. The thermoset resins most commonly used in composites are unsaturated polyester, urethane methacrylate, vinyl ester, epoxy and phenolic. The typical range of properties of these resins are given in Table 1.1. More specific information is given in Chapter 3 of the EUROCOMP Design Code. 

Hz loss peak can be used to characterise on real samples moreover, the loss peak still defines a precise temperature when DSC transitions have become unresolvable from the baseline. The process of cure itself can also be followed by using simple shear or torsion. Figure 7.28 shows the modulus ( ) of a polyester prepreg composite during isothermal cure at different temperatures. Short-time data are lost due to the time required to heat from ambient temperature to the isotherm. Table 7.5 compares time to cure by this method with DSC and DETA [17]. The initial modulus levels are rather ill-defined because the system is basically liquid. The two stages resolved at... 

Polyethylene terephthalate - e-caprolactone-co-polyesters Aliphatic polyethers Characterisation and chemical composition [137]... 

Challinor [29] has developed a method involving simultaneous pyrolysis-alkylation-GC and applied it to the characterisation of a range of polyesters, phenolic resins and polymer additives. The technique gives additional information about the composition of carboxylic acids, alcohols and substituted phenolic compounds in the pyrolysis products of these polymer types. The procedure involves methylation or butylation, using tetramethyl- or tetrabutyl-ammonium hydroxide, in the pyrolysis zone of the pyrolyser with analysis by flame ionisation GC or GC-MS. The advantages are greater structural information, minimal sample manipulation and increased sensitivity. 

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