Polymers 2014, 6(4), 1008-1025; doi:10.3390/polym6041008
Article

Effects of Polybenzoxazine on Shape Memory Properties of Polyurethanes with Amorphous and Crystalline Soft Segments

 and *
Received: 27 February 2014; in revised form: 13 March 2014 / Accepted: 24 March 2014 / Published: 1 April 2014
(This article belongs to the Special Issue Shape-Memory Polymers)
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Abstract: This paper evaluates the role of minor component polybenzoxazine (PB) on shape-memory properties of polyurethanes (PU) with glassy and crystalline soft segments. The polymer compounds were prepared in two steps. In the first step, benzoxazine, polyurethane pre-polymer, and chain extender butanediol (BD) were mixed into a solution followed by chain-extension of the pre-polymer with BD. In the second step, benzoxazine was polymerized at 180 °C for 3 h to obtain shape memory polymer compounds. The atomic force microscopy images revealed that the PB-phase formed uniform dispersions in PU. The presence of PB-phase induced shape-memory behavior in non-shape memory PU with amorphous soft segment and significantly improved the values of shape fixity, recovery ratio, and recovery stress in shape memory polyurethane with crystalline soft segment.
Keywords: shape memory; polyurethane; polybenzoxazine
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MDPI and ACS Style

Gu, S.; Jana, S. Effects of Polybenzoxazine on Shape Memory Properties of Polyurethanes with Amorphous and Crystalline Soft Segments. Polymers 2014, 6, 1008-1025.

AMA Style

Gu S, Jana S. Effects of Polybenzoxazine on Shape Memory Properties of Polyurethanes with Amorphous and Crystalline Soft Segments. Polymers. 2014; 6(4):1008-1025.

Chicago/Turabian Style

Gu, Senlong; Jana, Sadhan. 2014. "Effects of Polybenzoxazine on Shape Memory Properties of Polyurethanes with Amorphous and Crystalline Soft Segments." Polymers 6, no. 4: 1008-1025.


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