diplomsko delo
Ana Hočevar (Author), Irena Kralj Cigić (Mentor)

Abstract

Polivinilklorid je pogosto uporabljan polimer. Za izboljšanje njegovih lastnosti in podaljšanje življenjske dobe so ključni dodatki, saj je v čisti obliki krhek in neprožen. Poleg mehčal in barvil se polimeru dodajajo tudi antioksidanti, ki preprečujejo oksidativno razgradnjo. V diplomskem delu sem optimizirala pripravo vzorca za določanje dveh antioksidantov v PVC; Irganox 1076, ki je primarni antioksidant, in Irgafos 168, ki je sekundarni antioksidant. Vzorce sem raztapljala v mešanici ACN in MQ ter obarjala s THF. Za analizo sem uporabila tekočinski kromatograf z UV-VIS detektorjem. Na koncu sem še določila delež primarnega antioksidanta (Irganox 1076) v vzorcu plastične mape z metodo standardnega dodatka in ugotovila, da je delež en velikostni razred nižji od navedb v literaturi.

Keywords

polivinilklorid;PVC;dodatki v plastiki;antioksidanti;HPLC;diplomska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [A. Hočevar]
UDC: 542.61:543.544.5HPLC(043.2)
COBISS: 162990851 Link will open in a new window
Views: 10
Downloads: 6
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Other data

Secondary language: English
Secondary title: Optimization of Antioxidants Extraction from PVC
Secondary abstract: Polyvinyl chloride is a widely used polymer. Additives are key to improving its properties and extending its lifetime, as it is brittle and inflexible in its pure form. In addition to plasticizers and dyes, antioxidants are added to the polymer to prevent oxidative degradation. In my thesis I optimised the sample preparation for the determination of two antioxidants in PVC; Irganox 1076, which is the primary antioxidant, and Irgafos 168, which is the secondary antioxidant. The samples were dissolved in a mixture of ACN and MQ and precipitated with THF. I used a liquid chromatograph with UV-VIS detector for the analysis. Finally, I determined the proportion of the primary antioxidant (Irganox 1076) in the plastic folder sample by the standard addition method and found that the proportion was one order of magnitude lower than reported in the literature.
Secondary keywords: polyvinyl chloride;antioxidants;HPLC;Ekstrakcija (kemija);Tekočinska kromatografija;Univerzitetna in visokošolska dela;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000373
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, UNI Kemija
Pages: 26 str.
ID: 19904959