Determine the resorption rate and biocompatibility characteristics of 2 polyester ventilation tubes, and to determine whether soap and water exposure accelerates polyester tube degradation.
The acid base surface characteristics of four polyesters: poly l-lactic acid) (poly l-lacticl-lacidc acid) (PLLAA), polyhydroxybutyrate (PHB) and copoly(hydroxy butyracid20% hydroxyvalerate)PDLLA20% HV) have been determined from contact angle and surface tension expolyhydroxybutyrate
This paper, presents the results of a study on the cross-plane and in-plane water-retention characteristics of two nonwoven, polyester geotextiles.
The relationship between degradation speed of soil-buried biodegradable polyester film in a farmland and the characteristics of the predominant polyester-degrading soil microorganisms and enzymes were investigated to determine the BP-degrading ability of cultivated soils through characterization of the basal microbial activities and their transition in soils during BP film degradation.
The polyester resins were identified through the detection of characteristic polyester chemical precursors, such as PA, caprolactone, adipic and benzoic acids, NPG, CHDM and 1,6-hexanediol.
In this study, the influence of varying impactor geometries on the impact damage characteristics of hemp fibre reinforced unsaturated polyester composites were subjected to a low-velocity impact loading using an instrumented falling weight impact test setup.
The effect of fibre treatment on the thermal degradation and surface energy characteristics of hemp fibre reinforced unsaturated polyester (HFRUP) composites was investigated by means of a thermogravimetric analyser (TGA) in a nitrogen atmosphere and contact angle measurement.
The surfactant characteristics of novel random block polyelectrolyte polyester emulsifiers, SMTAPE, were investigated by analyzing the surface tension of a variety of SMTAPE with different molecular weights and different hydrophilicities in aqueous solution, and also by studying the change of surface tension of polystyrene (PS) latex with increasing SMTAPE emulsifier concentration.
The Py-GC/MS results did not reveal evidence of polyester resins (absence of characteristic precursors) but outlined the modification of the acrylic resin with styrene.
We sold a lot of polyester suits.
