Abstract
Palm Kernel Oil Polyol-based Polyurethane as Shape Memory Material: Effect of Polyol Molar Ratio
Highlights
Shape memory polymers (SMPs) are an emerging class of polymers with the ability to memorise a macroscopic shape and upon exposure to external stimulus.[1]
Shape memory polyurethane (SMPU) falls under the SMP category which consists of alternating soft and hard segments that are linked along a macromolecular backbone and due to thermal incompatibility, they tend to display microphase separation structure.[4]
A series of palm kernel oil polyol (PKO-p) based SMPU was successfully synthesised via two-step bulk polymerisation process
Summary
Shape memory polymers (SMPs) are an emerging class of polymers with the ability to memorise a macroscopic (permanent) shape and upon exposure to external stimulus.[1] They have gained widespread attention in both industrial and academic fields due to lightweight, low cost, easy processing, high shape recovery strain, high shape recoverability, superior molding properties, potential biocompatibility and biodegradability.[2,3]. Due to the fluctuation of petroleum prices and depletion of fossil fuels resources as well as the awareness of the society towards the environmental concern has urged the replacement of petroleum-based polyols with natural oil-based polyol.[7] Vegetable oils are the potential alternatives due to the abundance, relatively low cost and its renewability.[8,9]
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