Title: PREPARATION OF HTPB-BASED POLYURETHANE ELASTOMER USING POLYFUNCTIONAL HTPB SYNTHESIZED BY IN-SITU NITROXIDE MEDIATED POLYMERIZATION OF 1, 3-BUTADIENE 2) DYNAMIC- MECHANICAL PROPERTIES INVESTIGATION
Abstract: I n order to increasing of hydroxyl functionality of HTPB, an in-situ nitroxide mediated polymerization (NMP) of 1,3- butadiene was carried out in presence of TEPA as a polyfunctional nitroxide precursor. The effects of this new hydroxyl- terminated polybutadiene on thermal and dynamic-mechanical properties of its corresponding polyurethane elastomer were studied via DSC and DMTA tests. A significant enhancement in crosslink density of the elastomeric product with small increase in glass transition temperature was achieved using PFHTPB. Also the absence of any endothermic peak in DSC thermogram was an indication of no crystalline domain existing in these samples.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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