Due to their common use in outdoor applications, the durability of wood flour thermoplastic composites after ultraviolet exposure has become a special concern. Samples of 100% low-density polyethylene (LDPE) and LDPE filled with 10, 20, 30 wt% oak wood flour were melt-processed with a Brabender mixer and further weathered in an accelerated weathering chamber up to 500 h. The changes occurring in composites aged under controlled conditions were evaluated

The temperature influence upon the formation of an interpolymer complex (IPC) based on poly(aspartic acid) (PAS) and poly(ethylene glycol) (PEG), was investigated. The water PAS/PEG mixture was studied in the temperature range between 22°C and 37°C. The registered data were correlated with the blend composition and the molecular weight of PEG. The intervened interchain physical interactions, especially the hydrogen-bonds, were evidenced by FT-IR

The purpose of this study was to investigate the temperature influence on the complex formation in aqueous solutions of mixtures between a nonionic polymer, i.e., poly(ethylene glycol) (PEG), and a polyelectrolyte type polymer, namely poly(aspartic acid) (PAS). The PAS/PEG/water colloidal systems were studied as a function of the PEG chain length at different temperatures corresponding to the storage and use conditions of the systems. The changes

In this work we investigate the effect of the solvent quality on the thermodynamic behavior of the polydimethyldiphenylsiloxane copolymer by using turbidimetry and viscosimetry. The turbidimetric method was used for the determination of the composition of the solvent mixture at the theta point. The experimental data obtained by using the capillary viscometry both in good and theta solvent conditions have been processed by using classical Huggins

The interpenetrated macromolecular chains complexation between poly(aspartic acid) and poly(vinyl alcohol) in aqueous solution it was investigated. The interpolymer complexation process was evaluated through dynamic rheology. The aspects concerning the stability of the tested homopolymers and the prepared interpolymeric complex there were achieved from the evaluation of the aqueous solutions'zeta potential and also by determining the pH influence

The paper investigates the hydrodynamic properties of binary polymer1,2/solvent solutions in comparison with ternary polymer1/polymer2/solvent mixtures. The experimental data obtained by viscometry have been discussed by means of two methods: first, the plots obtained with the classical Huggins equation are analyzed, and in parallel, an evaluation of the parameters given by the new Wolf model is presented. The experimental data obtained for binary

Thermal-induced gelation of polyacrylonitrile (PAN) solutions in dimethylformamide was studied through rheological measurements. The entangled and non-entangled states were delimited for an overlap parameter of macromolecular coils of 2.7. In temperature sweep experiments, two types of gelation processes were identified for PAN entangled solutions at: (1) a reversible gelation in the region of low temperatures (below 15°C) due to the formation of

The applications of laser light scattering (LLS) to polymer physics and colloid science have been extensive and noteworthy, especially in particle-size analysis. The study presents an example of LLS application to the characterization of interpolymer complexation of poly(aspartic acid) with a vinylic polymer, by particle size and zeta potential evaluation. The LLS technique is complemented by oscillatory rheological data. The complexes have a potential