Preparation of HTPB-based polyurethane elastomer using polyfunctional HTPB synthesized via in-situ nitroxide mediated polymerization of 1,3-butadiene: 1) Synthesis, characterization and mechanical properties study

Rezaei Haghighat, Hassan; Barikani, Mehdi; Morshedian, Jalil

Volume 8, Issue 2 (12-2013) مواد پرانرژی 2013, 8(2): 3-13 | Back to browse issues page

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Rezaei Haghighat H, Barikani M, Morshedian J. Preparation of HTPB-based polyurethane elastomer using polyfunctional HTPB synthesized via in-situ nitroxide mediated polymerization of 1,3-butadiene: 1) Synthesis, characterization and mechanical properties study. مواد پرانرژی 2013; 8 (2) :3-13
URL: http://isaem.ir/article-1-323-en.html

Preparation of HTPB-based polyurethane elastomer using polyfunctional HTPB synthesized via in-situ nitroxide mediated polymerization of 1,3-butadiene: 1) Synthesis, characterization and mechanical properties study

Hassan Rezaei Haghighat ^*

, Mehdi Barikani

, Jalil Morshedian

Engineering research Institute , hrezaei@eri.ac.ir

Abstract: (16336 Views)

In order to increasing of hydroxy 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 multi-modal molar mass distribution of the product was elucidated by reductive hydrolyzation of the oligomeric product. The new polyfunctional hydroxyl-terminated polybutadiene (PFHTPB) was characterized and used in preparation of an HTPB-based polyurethane. The effects of this new hydroxyl-terminated polybutadiene on mechanical properties and thermal stability of its corresponding polyurethane elastomer were studied. The mechanical and thermal stability characterization of the elastomer were evaluated by tensile and TGA tests. Due to an efficient increase in crosslink density of the PFHTPB-based polyurethane elastomer, a significant enhancement in mechanical properties (more than 2.5 fold in tensile strength with small increase in elongation at break) was achieved. Furthermore the thermal stability of PFHTPB-based PU was comparable with its corresponding HTPB-based polyurethane elastomer.

Keywords: nitroxide-mediated polymerization, hydroxy terminated polybutadiene, functionality, polyurethane elastomer, thermal stability

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Type of Study: Research | Subject: خواص فیزیکی - مکانیکی پلیمرها
Published: 2013/12/11