Selectively Deuterated Poly(ε-caprolactone)s: Synthesis and Isotope Effects on the Crystal Structures and Properties

摘要: Selective deuteration is an important tool for many analytical techniques including neutron scattering and spectroscopies. However, the availability of deuterated materials limited because challenges in their synthesis. Here, we report synthesis partially fully e-caprolactone monomers corresponding polymers, poly(e-caprolactone)s (PCLs), investigation isotope effects on crystalline structures physical properties. Deuteration PCLs leads to smaller crystal lattices volumes compared protiated by amount proportional levels. The linear trend suggests that volume effect PCL primarily governed vibrations C–D C–H bonds. large intrachain contraction polyethylene reported literature can be ascribed presence polar ester groups PCLs. Deuterated also display lower melting temperatures than ...