1 research outputs found
Ionically Cross-Linked Shape Memory Polypropylene
An ionically cross-linked
syndiotactic polypropylene (ix-sPP) was
synthesized by subsequent grafting of maleic anhydride (MA) to the
polymer followed by compounding with ZnO. The polymer network was
investigated by X-ray scattering, transmission electron microscopy,
and various thermal and mechanical analyses. The optimized polymer
network with 1 wt % MA grafting and 20 wt % ZnO exhibits a crystal
melting temperature of 125 °C and rubber elastic behavior up
to 203 °C and becomes a viscous polymer melt at higher temperatures.
This process is fully reversible. Further, ix-sPP is an exceptionally
stable ionic polymer network that matches the stability of the respective
covalently cross-linked polymer in terms of shape memory properties.
Additionally, the ionic cross-linking affords thermoplastic processability
and shape memory assisted self-healing