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Smectite clays, such as montmorillonite, are of great industrial value because of their high aspect ratio, plate morphology, intercalative capacity, natural abundance and low cost. In the present work, polypropylene/montmorillonite (PP/MMT) composites have been prepared and their thermal...
A mathematical model has been constructed to analyse the evolution of a population of molecules undergoing simultaneous end-chain scission and recombination. The model also incorporates a mechanism for the removal of volatile species so that comparison with experimental thermogravimetric studies...
The hydrolytic degradation of poly(3-hydroxyalkanoates), PHA, blends with low and high molecular weight additives was examined. The PHA films were characterised by Differential Scanning Calorimetry, DSC, and Atomic Force Microscopy, AFM. The DSC and AFM results revealed that hydrolyzable PLA and...
Novel benzo( de )anthracen-7-one yellow–green and orange–red fluorophores, containing a hindered amine stabiliser fragment have been synthesised and their ability for “one-step” mass or chemical colouration and stabilisation of poly(methyl methacrylate) has been demonstrated. Two of the...
Five predominantly isotactic metallocene polypropylene samples have been synthesized using rac -ethylenebis(indenyl)zirconium dichloride/methyl aluminoxane as catalyst/co-catalyst system. The molecular weight, ranging from 3000 to 41 000 has been determined by viscometry. The chemical and...
A series of high molar mass aliphatic homo- and co-polyesters was obtained from 1,4-butandiol and methyl esters of succinic, adipic, sebacic acids, and these materials were characterised by 1 H NMR, SEC, DSC, X-ray and viscosity. Good filmability was achieved for all the polymers. The...
The degradation of room temperature vulcanized (RTV) silicone rubbers, swelled in different solvents and followed by the aminolysis reaction using diethylamine as a nucleophilic reagent, was studied. The reaction was further facilitated with a potassium hydroxide catalyst dissolved in ethanol....
A biodegradability study of several aromatic building blocks used for the preparation of poly(ethylene terephthalate) copolymers of technical interest has been carried out. They include the dimethyl esters of terephthalic, 5-nitroisophthalic, and nitroterephthalic acid, as well as the...
This paper introduces the peak property method (PPM) which can concurrently estimate the three kinetic parameters (reaction order, activation energy, and pre-exponential factor) of a pyrolysis reaction from a single derivative thermogravimetry (DTG) curve. A key assumption of the PPM is that a...
The effects of gamma radiation on polypropylene, styrene–butadiene–styrene copolymers and their blends were studied. Colorimetry determinations, melt flow index measurements, FTIR and DSC analysis were carried out to characterize the products. Electron spin resonance was also used to study...
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