Miscibility of crystalline polymer with crystalline polymer

Abstract

The miscibility of crystalline Poly (tert-butyl($\alpha$-hydroxymethyl methacrylate) with crystalline Poly (ethylene oxide) has been studied. FT-IR, DSC, viscometer, and SEM have been carried out on the blends of PTBHMA/PEO. The viscostic behavior of blend systems in chloroform gives the evidence which PEO has compatibility with PTBHMA. The melting temperature Tm and enthalpy ratios of PEO and PTBHMA were measured in various weight fraction of PTBHMA. With SEM technique, we have ascertained the morphological changes. In FT-IR spectroscopic study, we analyzed the spectra of the blend systems by using the method of digital weighed subtraction. From the results, we have found that miscibility takes place between two crystalline polymers, and that main attractive interaction force is hydrogen bonding. PTBHMA has triple intermacromolecular interaction under 40 wt \% composition of PTBHMA. The conformation and crystallinity of two polymers is perturbed by each other. Consequently, two crystalline polymers are compatible.