EQUILIBRIUM MELTING TEMPERATURE OF POLY ε-CAPROLACTAM FRACTIONS

Intermolecular interactions in poly(vinylidene fluoride) and ε- caprolactam mixtures

Mixtures of poly(vinylidene fluoride) (PVDF) and ε−caprolactam (CPL) have been investigated as models for possible cross-interactions between vinylidene fluoride and amide structural units, that might account for the very fine phase morphology previously observed in PVDF/polyamide 6 blends. Over the entire composition range, the PVDF/CPL mixtures are monophase above the PVDF melting temperature...

Efficacy of ε-Poly-L-lysine as an Antibacterial Additive for Platelets Stored at Room Temperature

Critical examination of prewetting and surface melting on caprolactam

In a previous study, surface melting on the ~001! surface of caprolactam ~C6H11ON! was reported to proceed in a series of layering transitions, followed by a prewetting transition. We have reproduced the original results and shown that they can be better explained by the wetting of hydrated caprolactam ~with H2O molecules at bridging sites between the caprolactam dimers! on caprolactam, and tha...

Crystallization of Poly(ε-caprolactone) in Poly(vinylidene fluoride)/Poly(ε-caprolactone) Blend

The crystallization behavior of poly(ε-caprolactone) (PCL) in a poly(vinylidene fluoride) (PVDF)/PCL blend as well as on a highly orientated PVDF substrate was studied by means of POM, DSC and TEM. The results show that the miscibility of the PVDF/PCL blend and the spherulitic morphology of PVDF varies with the blend ratio. For all the compositions, the pre-existing PVDF crystals accelerated th...

Stimuli Responsive Poly(Vinyl Caprolactam) Gels for Biomedical Applications

Poly(vinyl caprolactam) (PNVCL) is one of the most important thermoresponsive polymers because it is similar to poly(N-isopropyl acrylamide). PNVCL precipitates from aqueous solutions in a physiological temperature range (32–34 ̋C). The use of PNVCL instead of PNIPAM is considered advantageous because of the assumed lower toxicity of PNVCL. PNVCL copolymer gels are sensitive to external stimuli...