Reološka svojstva PVP/PEG mješavina

master's thesis

• Title (english): Rheological properties of PVP/PEG blends
• Author: Jago Kvesić
• Mentor: Mirela Leskovac (mentor)
• Committee member: Mirela Leskovac (predsjednik povjerenstva)
• Committee member: Emi Govorčin Bajsić (član povjerenstva)
• Committee member: Katarina Mužina (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2023-09-27, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Polimerni materijali i njihova primjena vrlo je važna - upotrebljavaju se kao materijali od kojih se izrađuje velik broj različitih proizvoda koji se svakodnevno koriste. Čisti polimeri često ne zadovoljavaju određena svojstva koja su potrebna za njihovo specifično područje primjene. Zbog toga se vrlo često dodaju različiti aditivi koji poboljšavaju njihova svojstva. Drugi način poboljšavanja svojstava polimera jest priprava polimernih mješavina, iz dviju ili više polimernih komponenata. U ovom radu pripravljene su mješavine dvaju polimera –
poli(etilen-glikola) (PEG) i poli(vinil-pirolidona) (PVP) različitih masenih udjela pojedinih komponenata. Mješavine su pripravljene na dva načina - zamiješavanjem u vodenoj otopini i zamiješavanjem u talini, korištenjem Brabender gnjetilice. Mješavinama pripravljenim u otopini ispitivana su reološka svojstva, te su uzorci analizirani diferencijalnom pretražnom kalorimetrijom i termogravimetrijskom analizom. Mješavine u talini su ispitivane diferencijalnom pretražnom kalorimetrijom i termogravimetrijskom analizom. Na temelju dobivenih rezultata, izvedeni su zaključci o reološkim svojstvima mješavina kao i o njihovim toplinskim svojstvima.

Abstract (english)

Polymer materials and their application are very important - they are used as a material from which a large number of different products are made that are used every day. Polymer materials often do not meet the properties required for their specific application. For this reason, various additives are often added to them to improve their properties. Another way to improve polymer properties is to prepare polymer blends from two or more pure polymer components. In this work, blends of two polymers - poly(vinyl-pyrrolidone) and poly(ethylene glycol) - were prepared in different mass ratios. The blends were prepared in two ways – by mixing the polymers in a water solution and by mixing the polymers in a melt with a Brabender kneader. The rheological properties of the blends prepared in solution were tested, and the samples were analyzed by differential scanning calorimetry and thermogravimetric analysis. The mixtures prepared in the melt were studied by differential scanning calorimetry and thermogravimetric analysis. Based on the results obtained, conclusions were drawn about the rheological and thermal properties of the blends.

• Keywords: polimeri; polimerne mješavine; reološka svojstva; poli(vinil-pirolidon); poli(etilen-glikol)
• Keywords (english): polymers; polymer blends; rheological properties; poly(vinyl-pyrolidone); poly(ethylene-glycol)
• Language: croatian
• URN:NBN: urn:nbn:hr:149:506864
• Study programme: Title: Chemical Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-11-23 14:03:16