Ernie Suzana Ali

Clay Reinforced Hyperbranched Polyurethane Nanocomposites Based on Palm Oil Polyol as Shape Memory Materials

Reactive nanoclay reinforced hyperbranched polyurethane (HPU) nanocomposites have been synthesized with the introduction of palm oil polyol as part of the precursor. The HPU were prepared in a two-step process using polycaprolactonediol, 4,4’-diphenylmethane diisocyanate and 1,4-butanediol as chain extender. Nanoclay was added with the purpose of improving the properties of the pristine polyurethane. The introduction of palm oil polyol is believed to enhance the mixing process between polymer matrix and filler. Thermal, mechanical and shape memory properties of produced HPU were investigated. The results showed that the crystallinity of HPU nanocomposites decreased with introduction of clay particles and that the mechanical and shape memory properties were enhanced with the addition of small amount of reactive nanoclay (up to 3 wt%).

Electrical Conductivity of BioBased Shape Memory Polyurethane Filled with CNT

Biobased shape memory polyurethane filled with carbon nanotubes (CNT) were prepared using two step polymerization process. The bio based shape memory polyurethane (SMPU) were composed of polycaprolactonediol, polyol based on palm oil, 4, 4’-diphenylmethane diisocyanate and 1, 4-butanediol. In this paper, CNTs has been used as fillers to introduce the electrical conductivity in the SMPU. The bio-based shape memory polyurethane shows electrical conductivity with addition of 7 wt% CNT.

Palm Oil Polyol/ Polyurethane Shape Memory Nanocomposites

A series of nanoclay reinforced thermoplastic polyurethane with shape memory effect have been successfully synthesized via two-step polymerization process. The polyurethanes are composed of polycaprolactonediol, palm oil polyol, 4,4’-diphenylmethane diisocyanate and 1,4-butanediol. Nanoclay was added in order to improve the overall properties of the pristine polyurethane. Besides, the addition of palm oil polyol is believed to enhance the crosslinking process and further improve the properties. X-ray diffraction result showed that there is a decrease in crystallinity of polyurethane nanocomposites as clay is added. Good shape memory and mechanical properties of resulting polyurethane nanocomposites were obtained in this work.