POSS-enhanced shape-memory copolymer of polynorbornene derivate and polycyclooctene through ring-opening metathesis polymerization

A copolymer consisting of polycyclooctene (PCOE) and poly(5-norbornene- exo, exo-2,3-dicarboxylic anhydride) (PNBEDCA) was firstly synthesized through ring-opening metathesis polymerization, and then the obtained copolymer P(COE- co-NBEDCA) was readily modified by grafting reaction of NBEDCA units w...

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Bibliographic Details
Published in:Reactive & functional polymers 2011-11, Vol.71 (11), p.1096-1101
Main Authors: Yang, Dan, Gao, Danyi, Zeng, Chi, Jiang, Jisen, Xie, Meiran
Format: Article
Language:English
Subjects:
Applied sciences
Copolymers
Decomposition reactions
Exact sciences and technology
Inorganic and organomineral polymers
Metathesis
Physicochemistry of polymers
Polycyclooctene (PCOE)
Polyhedral oligomeric silsesquioxanes (POSS)
Polymerization
Polynorbornene
Polynorbornene (PNBE) derivative
Preparation
Recovery
Ring-opening metathesis polymerization (ROMP)
Shape memory
Shape memory polymer (SMP)
Stress-strain relationships
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Summary:A copolymer consisting of polycyclooctene (PCOE) and poly(5-norbornene- exo, exo-2,3-dicarboxylic anhydride) (PNBEDCA) was firstly synthesized through ring-opening metathesis polymerization, and then the obtained copolymer P(COE- co-NBEDCA) was readily modified by grafting reaction of NBEDCA units with polyhedral oligomeric silsesquioxanes (POSS) to afford a novel functionalized copolymer P(COE- co-NBEDCA- g-POSS), in which carboxyl and POSS as side chains attached to polynorbornene backbones. The copolymers were characterized by means of thermogravimetry, wide-angle X-ray diffraction, and stress–strain measurements. The shape memory effect of the copolymer was evaluated by dynamical mechanical analysis and shape recovery speed. Having the properties of the good shape fixity and the large shape recovery, the POSS-enhanced copolymer is expected to use as a potential shape memory material.
ISSN:1381-5148
DOI:10.1016/j.reactfunctpolym.2011.08.009