Research of biopolyurethane foam modified with paper production waste

Agnė Kairytė

Doctoral dissertation

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The thesis investigates rigid polyurethane foam from biopolyols for which structure and properties modification, paper thermally and chemically treated paper production waste sludge particles are used. After detailed analysis of properties and impact on products of these waste, polyurethane foams with properties, which are characteristic to thermal insulating materials and defined in normative referecnces, may be obtained. The aim of the dissertation – to develop and test dimensionally stable polyurethane foam synthesyzed from rapeseed oil-based polyols and modified with paper production waste sludge particles.

The thesis consists of introduction, three chapters, general conclusions, references and the list of author‘s publications. The introduction reveals the problem under investigation, topicality of the work, the research object, aims and tasks, methodology, novelty of the work, significance of the obtained results as well as defended statements. In the end of introduction, publications of the author, presentations at conferences and dissertation structure are presented.

Chapter 1 presents the usage of renewable resources in the production of polyurethane foam as one of the measures for the implementation of sustainable development aims. It is as well analysed the impact of raw materials – polyols, isocyanates, water, catalysts, surfactants and chain extenders on the structure and properties of the final products. The possibility of multifunctional chain extenders to be used in polyurethane foam producted is considered. Analysis of feasibility of paper production waste sludge obtained from waste water treatment equipment as well as non modified and titanates, silanes and zirconate modified fillers to be used in building materials industry is conducted.

Chapter 2 describes raw materials used in the work, their properties, conducted research methods as well as compositions and technological production scheme of polyurethane foam, propylene glycol modified polyurethane foam and propylene glycol and paper production waste sludge particles modified polyurethane foam specimens.

Chapter 3 investigates water amount impact on the density, initial shrinkage and dimensional stability at increased temperature and relative humidity of polyurethane foam. It presents the impact of propylene glycol from rapeseed glycerine and rapeseed glycerine as chain extenders on physical and mechanical properties of the products. It as well demonstrates the results of dynamic viscosity of propylene glycol and paper production waste sludge particles modified polyol mixtures, performance and structure of polyurethane foam composites.

5 articles focusing on the subject of the discussed thesis are published and results of the research are presented in 6 scientific conferences at national and international level.

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Imprint No:
145×205 mm
152 p.
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