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This study aims at investigating the effect of grape seed extract (GSE) immobilization into individual pores and cages of silica/silsesquioxane networks. It might be considered that, since chemically stable guest molecules are already present in the precursor solution for the synthesis, the entrapping of vegetable extract proceeds without significant modification or other adverse changes during the...
Hybrid polymer networks (HPNs) based on unsaturated polyester resin (UPR) and epoxy resins were synthesized by reactive blending. The epoxy resins used were epoxidised phenolic novolac (EPN), epoxidised cresol novolac (ECN) and diglycidyl ether of bisphenol A (DGEBA). Epoxy novolacs were prepared by glycidylation of the novolacs using epichlorohydrin. The physical, mechanical, and thermal properties...
Broadband dielectric relaxation spectroscopy (DRS), thermally stimulated depolarisation currents (TSDC), differential scanning calorimetry (DSC) and to a lesser extent water uptake measurements, were employed to investigate molecular mobility, morphology and crystallization/melting events of PEG in poly(imide-amide)–polyethylene glycol hybrid networks (PIA–PEG) with short (M n =1000g/mol)...
Dielectric techniques, including thermally stimulated depolarization currents and isothermal discharging currents measurements in addition to classical dielectric relaxation spectroscopy, were employed to investigate molecular mobility in the poly(imide-amide)-poly(ethylene adipate) (PIA-PEA) hybrid materials with short (M n =1.300gmol -1 ) PEA crosslinks. The techniques used...
Segmental dynamics at 200-500K and nanometer-scale structure were studied by SAXS, DSC and creep rate spectroscopy (CRS) techniques in two series of poly(ethylene adipate)-crosslinked poly(imide-amide)s with regularly varied composition and different lengths of PEA crosslinks (M n =1.300 and 2.700gmol -1 ). The crystallization ability was observed in networks with longer PEA crosslinks...
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