Synthesis and Properties of Oligomers with Hydroxy End-Groups

Structure and several properties of AgNO3 and As2O3 doped polymer composites have been investigated, including their antibacterial activity against E. coli, S. aureus, C. albicans and S. epidermidis. New silver or arsenic doped polymer composites have been characterized by an X-ray diffraction (XRD), a scanning electron microscopy combined with an energy dispersive X-ray spectroscopy (SEM/EDS) and ion release studies. The antibacterial evaluation of each of the composite samples was conducted using S. aureus in the liquid broth culture, with 10, 20 and 30 % of liquid extract added to the bacterial culture. Control S. aureus stocks were used for comparison at each time period and were recorded at 100 % at each time period. For samples with the PLA plasticizer the bacterial viability was significantly reduced for each composition containing Ag/As and was similar for each dosage concentration.

Section: Introductionmentioning

confidence: 99%

Antibacterial Efficacy of Silver or Arsenic Doped Polymer Composites Against Several Kinds of Bacteria

Brostow¹,

Gahutishvili²,

Wren³

et al. 2022

“…The reason is their advantages over other polymers such as easiness during products formation and good operational characteristics of the final products [6]. For many years the researches regarding the creation of ER based oligomers with various functional groups [7][8][9][10][11][12] have been conducted at Lviv Polytechnic National University (Ukraine).…”

Section: Introductionmentioning

confidence: 99%

Influence of Polymer-Silicate Nucleator on the Structure and Properties of Polyamide 6

Levytskyi¹,

Masyuk²,

Katruk³

et al. 2020

Physico-chemical properties of developed nickel-containing modified silicate materials as the nucleators for composites based on polyamide 6 are presented. As it was established, additive of the nucleator modified by polyvinylpyrrolidone promotes the increase of crystallinity degree of polyamide 6 and the decrease of crystallite size. It was found that changes in the structure of the material cause the increase of its tensile strength, surface hardness and Vicat softening point.

“…Epoxy compounds are widely used as the initial materials [5]. The reason is the presence of reactive epoxy groups in their structures, which can be converted into other reactive groups [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Carboxy Derivative of Dioxydiphenylpropane Diglycidyl Ether Monomethacrylate as an Additive for Composites

Bratychak¹,

Iatsyshyn²,

Shyshchak³

et al. 2017

Self Cite

Abstract.1 Carboxy derivative of dioxydiphenylpropane diglycidyl ether monomethacrylate (CDE) containing the fragment of dianic epoxy resin, as well as free carboxy and methacrylic groups has been studied as a component of epoxy-oligoesteric and bitumen-polymeric mixtures. The epoxy-oligoesteric mixtures were investigated using ED-20 dianic epoxy resin, the crosslinking of which was carried out in the presence of polyethylene polyamine. Physico-mechanical properties and chemical stability of the coatings based on epoxy-oligoesteric mixtures with CDE were determined. Bitumen-polymeric mixtures with CDE were studied taking bitumen produced at JSC "Ukrtatnafta" (Ukraine) as an example.