Abstract Nano‐Mg(OH) 2 was synthesized with an in situ deposition technique, and its size confirmed by X‐ray diffraction. A polypropylene–Mg(OH) composite prepared melt‐extrusion processing. The addition of a small quantity nanofiller (up to 10 wt %) increased Young's modulus up 433% respect the virgin polypropylene. 4 % Mg(OH) produced maximum increase, further decrease tensile strength observed increase concentration nano‐Mg(OH) . Increases hardness other properties were due higher...

A potentially active hindered amine light stabilizer (HALS) was successfully anchored onto multiwalled carbon nanotubes (MWCNTs) and used as a light-stabilizing yet reinforcing multifunctional nanofiller to obtain UV-durable polymer nanocomposites. The influence of such stabilizing MWCNTs on the photo-oxidation behaviour structure-properties polypropylene (PP) studied. composites were prepared by solution mixing followed melt compounding with (PP). resulting composite exhibits excellent...

Abstract The photo‐ and thermooxidative degradation of different grades high‐impact polystyrene (HIPS) has been studied by FT‐IR spectroscopy. oxidized films were treated with NH 3 SF 4 for the rapid identification resolution various carbonyl species, alcohols, hydroperoxides. All sample gave similar oxidation products, but in varying quantities. heterogenity film was also determined micro‐FT‐IR thermal processes at temperature compared. © 1994 John Wiley & Sons, Inc.

Photooxidative degradation and stabilization of a polystyrene–block–polybutadiene–block–polystyrene thermoplastic elastomer using polychromatic UV light in air at 60°C has been studied by monitoring the appearance hydroxyl carbonyl groups Fourier transform infrared spectroscopy. The extent photooxidative different samples compared. rate photooxidation was also estimated presence concentrations 2,6-di-tert-butyl-4-methylphenol [BHT], 2-(2′-hydroxy-5′-methylphenyl)benzotriazole [Tinuvin P]...

Owing to the unstable nature of latex compound and strict specifications in quality products such as condoms examination gloves, rejection industry comes about 10 15% rubber consumed. These rejects contain 95% hydrocarbon very high quality. A cost-effective technique has been developed for reuse natural (NR) prophylacties waste styrene–butadiene (SBR). The influence powdered on curing characteristics, mechanical properties, failure behavior SBR investigated. More emphasis is placed effect...

The Constant Composition (CC) kinetics method has been used for studying the mineralization of calcium oxalate monohydrate (COM) at sustained supersaturations in presence pre-bladder urine and macromolecules isolated from normal kidney bladder stones. is especially sensitive investigating inhibitory activities these urinary macromolecular components (UMMC) matrix (MMMC) with a coefficient variation growth rate approximately 2%. Significant COM mineral inhibition was observed wide molecular...

The photo-oxidation of ethylene propylene diene monomer (EPDM)/ layered double hydroxide (LDH) composites as well EPDM/LDH with stabilizers is studied under accelerated UV irradiation (λ ≥ 290 nm) at 60°C for different time intervals.The development functional groups during oxidation was monitored by FT-IR spectroscopy.The photodegradation the pristine polymer and take place increase in hydroxyl carbonyl times, estimated.EPDM filled LDH showed higher degradation rate than EPDM, while acidic...

Abstract The thermo‐oxidative degradation behaviour of heterophasic ethylene‐propylene copolymers and their fractions is discussed the results are compared with those for corresponding homopolymers. most informative were obtained when a small reactive species produced in was treated gases. extent thermal monitored by Fourier transform infrared spectroscopy. kinetics oxygen absorption have also been studied at 140° C. Oxygen deficiency manifested formation diffusion‐limited products from...

The polybutadiene (PB) content and its microstructure in different grades of high impact polystyrene (HIPS) has been studied by various spectroscopic techniques. PB is characterized deformation bands FTIR spectroscopy at 994, 967, 912, 729 cm−1. FT-Raman was used for higher constant resolution over the range wave numbers. It provides reasonable signal to noise ratios near IR excited Raman. Proton 13C-NMR utilized determination HIPS tacticity, reactivity ratios. © 1996 John Wiley & Sons, Inc.

Abstract Detailed photoproducts from photoirradiation of heterophasic ethylene‐propylene copolymers and their fractions have been compared by infrared spectroscopy combined with chemical derivatization. The oxidized films were treated gaseous NH 3 , SF 4 NO for the rapid identification resolution various carbonyl species, alcohols, hydroperoxides. photoproduct formation depends upon composition sample. heterogeneities in thin also determined micro FTIR spectroscopy. © 1993 John Wiley & Sons, Inc.