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Evaluation of the effect of a hyperbranched polyester on the thermal, rheological, morphological and mechanical properties of polyvinyl chloride/hemp fiber blends
(Journal of Physics: Conference SeriesReino Unido, 2019-11-29)
The aim of this study was to investigate the effect of the hyperbranched polyester polyol from second generation content on the structural, thermal, rheological, morphological and mechanical properties of recycled polyvinyl ...
Clinical evaluation of proximal contacts of Class II esthetic direct restorations
(2004-11-01)
Objective: This study evaluated the effectiveness of proximal contacts in Class II restorations using two types of matrix bands (steel and polyester) with two different restoration techniques (incremental and with ...
Clinical evaluation of proximal contacts of Class II esthetic direct restorations
(2004-11-01)
Objective: This study evaluated the effectiveness of proximal contacts in Class II restorations using two types of matrix bands (steel and polyester) with two different restoration techniques (incremental and with ...
Thermal studies of poly(esters) containing silicon or germanium in the main chain
(ELSEVIER SCIENCE BV, 2005-06-20)
The thermal properties of poly(esters) containing Si and/or Ge in the main chain derived from the acid dichlorides bis(4-chloroformylphenyl)-dimethyl-silane, bis(4-chloroformyl-phenyl)-dimethyl-germane, bis(4-chlorofonny ...
Synthesis and characterization of aliphatic polyesters from glycerol, by-product of biodiesel production, and adipic acid
(2007)
In the present work, polyesters were prepared from the polycondensation between glycerol and adipic acid using dibutyltin dilaurate as catalyst. Three glycerol: adipic acid molar ratio were used for the bulk polymerization ...
Synthesis and characterization of polyesters derived from glycerol and phthalic acid
(2007)
The production of polyester via polycondensation between glycerol and phthalic acid using dibutyltin dilaurate is reported. Three glycerol:phthalic acid molar ratio used for the bulk polymerization were: 2:2; 2:3 and 2:4. ...
Unsaturated polyester based composites reinforced with curauá fiber - Preliminary studies
(2000-12-01)
Curauá fiber processing characterization has been performed throughout the different processing steps. Unsaturated polyester has been used as matrix in the production of curauá reinforced composite samples. Compression ...
Torsion modulus with CaCO3 fillers in unsaturated polyester resin - mechanical spectroscopy
(Assoc Brasil Polimeros, 2022-01-01)
This work presents an alternative to studying and determining the torsion modulus, G, in composites. For this purpose, we use a measuring system with a rotation motion sensor coupled with a torsion pendulum that allows for ...
Maximizing the utility of bio-based diisocyanate and chain extenders in crystalline segmented thermoplastic polyester urethanes: effect of polymerization protocol
(Elsevier B.V., 2014-12-15)
High molecular weight semi crystalline thermoplastic poly(ester urethanes), TPEUs, were prepared from a vegetable oil-based diisocyanate, aliphatic diol chain extenders and poly(ethylene adipate) macro diol using one-shot, ...