Persons at STU
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Basic information about a final thesis
|Type of thesis:|
Influence of physical and chemical blowing agents on properties of thermoplastic and thermoplastic elastomer blends
|Written by (author):|
|Projektové stredisko (DO FCFT)|
|prof. Ing. Ivan Chodák, DrSc.|
|doc. Ing. Roman Čermák, Ph.D.|
Final thesis progress:
Final thesis was unsuccessfully defended.
Additional informationAdditional information about the final thesis follows. Click on the language link to display the information in the desired language.
|Language of final thesis:|
|Title of the thesis:||Influence of physical and chemical blowing agents on properties of thermoplastic and thermoplastic elastomer blends|
The submitted habilitation thesis describe an influence of physical and chemical blowing agents on properties of thermoplastic as well as thermoplastic elastomer blends. The given aim of the work is going through theoretical level of blowing mechanism by using physical and chemical blowing agents onto real, industrial utilization in the particular field. The work shows significant influence of the polymer blend composition in the process of nucleation and in the process of microcells growing. Dominant role plays viscosity of the polymer blend, while specific role has fillers which on one side may act as an initiation sites for creation of microcells and on the other side from viscosity point of view, fillers can influence their growth. Due to the fact, that viscosity as a function of temperature and pressure has significant influence on polymer processing, crutial was to achieve process set-up optimation of the saturation of super-critical CO2 (sCO2) in olefinic thermoplastic elastomer (TPO). The same importance of process set-up was observed during extrusion of plasticized polyvinylchloride (PVC) when chemical blowing agent has been used. The results clearly show, that to achieve a homogeneous microcellular structure which has positive influence on evaluated properties of given polymer blends is possible by precision process set-up optimation. Such an optimation consequent in achievement of suitable viscosity surrounding within polymer blends. The submitted work also shows possibility of PVC compound replacement by Halogen Free Fire Resistance (HFFR) compounds based on Polyethylene (PE) and Ethylene-octene copolymer (POE), suitable for dynamic applications.
Supercritical CO2 (sCO2), Polyvinylchloride (PVC), Microcellular compounds, Thermoplastic elastomer, Physical and Chemical blowing agents
|Final thesis (final thesis appendices) unlimited|
Reviews for final thesis unlimited