https://sci.ldubgd.edu.ua/jspui/handle/123456789/14707 2026-04-07T04:19:57Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/15202 Title: INFLUENCE OF POLYMER-SILICATE NUCLEATOR ON THE STRUCTURE AND PROPERTIES OF POLYAMIDE 6 Authors: Levytskyi, Volodymyr; Masyuk, Andrii; Katruk, Diana; Kuzioła, Rafał; Bratychak, Mykhailo; Chopyk, Nataliia; Khromyak, Ulyana Abstract: 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. 2020-01-01T00:00:00Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/15201 Title: Modified densified waste of expanded polystyrene and its blends with polyamide 6 Authors: Levytskyi, V.Ye.; Moravskyi, V.; Masyuk, A.; Kuziofa, R.; Graz, K.; Khromyak, U. Abstract: The regularities of expanded polystyrene (EPS) waste modi- fied by polyvinylpyrrolidone (PVP) with the simultaneous gas release in various solvents were revealed. The upper sorption limit depends on the nature of the solvent, the concentration and molecular mass of the PVP, the temper- ature of the process, and the apparent density of the EPS. It was established that the sorption limit of PVP increases with increasing of its concentration in the system and decreases with molecular mass increasing. Based on XRD and FTIR analyses, it was determined that materials based on polyamide 6 and EPS modi ed by PVP have an increased crystallinity degree by 10–15%, a smaller average crystallite size and higher technological compatibility. The addition of PVP-modi ed EPS contributes to the increase of the yield strength of polyamide 6 by about 5%–10%. The increase of the Vicat softening point by 5–8 K and the sur- face hardness by 25–30 MPa of materials based on polyam- ide 6 and modi ed polystyrene was investigated. It is caused by the redistribution of intermolecular bonds between the components of the blend under by the effect of a uniformly distributed PVP in the EPS resulting in increased compatibility between the components and the compacted structure. POLYM. ENG. SCI., 00:000–000, 2020. © 2020 Society of Plastics Engineers 2020-01-01T00:00:00Z