Synthesis of Shape Memory Polyurethane/Nanoclay Composites: Chemical Structure and Interactions between Polymer and Nanoclay Particles

Document Type : Research Paper

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Abstract

Although  there  are many works  published  on  shape memory  polyurethanes, but  no  report  is  found  on  PCL-based  polyurethane  composite  using  PCL with  molecular  weight  of  2000  g/mol  and  nanoclay  particles  via  in-situ polymerization.  In  this  work,  we  try  to  approach  some  problems  concerning  the chemical structure, dispersion of a noparticles in the matrix and interaction between nanoparticles  and  polymer  in  shape  memory  of  PCL  (Mn=  2000  g/mol)-based  polyurethane/nanoclay  composites.  While  PCL  (Mn=  2000  g/mol)  polyurethane constituted the soft segments, MDI/BD formed the hard segments. The weight ratio of  soft  to  hard  segments was  found  to  be  65/35. Composites were  synthesized  in presence 1 and 3 wt% of nanoclay (Cloisite®30B) via in-situ polymerization by a two-step method. Effect of nano particles on their interactions with polyurethane chains, crystallinity, mechanical properties and shape memory have been investigated using

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Iranian Journal of Polymer Science and Technology
Volume 25, Issue 1 - Serial Number 1
May and June 2012
Pages 19-30

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