In order to better understand the kinetics and morphological changes of the polymer blend due to the copolymer additive, TEM was conducted on the blend with quench conditions designed to simulate the TJLS experiments.
This size range agrees well with the q-range targeted from the TJLS data in Fig.
This is consistent with the TJLS result of [Alpha]/[Beta] [less than] 3, where we hypothesized that clearly defined phases at the coexistence compositions may not have been achieved.
The TEM results appear to be consistent with a blend compatibilization effect and also give a better understanding of the kinetics observed by TJLS.
The equilibrium phase diagram, including the coexistence and spinodal curves for an asymmetric low molecular-weight PSD/PB blend with and without various amounts of a symmetrical diblock PSD-PB copolymer, has been determined by TJLS.
TJLS results indicate that the time dependence of the concentration fluctuation growth does not follow a universal functional form with diblock copolymer added.