Abstract
The influence of the grafting ratio of PMMA on the shape memory effect was studied by synthesizing and characterizing fast recoverable polyurethane/montmorillonite–poly(methyl methacrylate) (PU/MMT–PMMA) composites. PMP3 with a grafting ratio=3 had the fastest recovery rate, 21.1° per second at 60 °C, whereas the recovery rates of PU and PU/MMT were 6.1 and 9.5° per second, respectively. All the samples recovered to the original shape in 3 s at 80 °C, while PMP3 displayed a much higher shape memory performance capacity than the other two specimens in 1 s.
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