Synthesis, characterization, and thermal properties of block copolymers containing poly(styrene-co-4-vinylpyridine) and poly(styrene-co-butyl acrylate) by controlled radical polymerization

摘要

Radical polymerization of styrene and mixtures of styrene and 4-vinylpyridene was performed in the presence of 2,2,6,6-tetramethylpiperidene-N-oxyl (TEMPO) producing polymers with controlled molecular weights and molecular weight distributions. The living nature of these polymers was confirmed by using them as macroinitiators in the block copolymerization of styrene and butyl acrylate. The thermal properties of the synthesized statistical diblock polymers measured by differential scanning calorimetry indicated that a phase-separated morphology was exhibited in most of the block copolymers. The results were confirmed by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS) showing microphase-seoarated morphology as is known for home A-B diblock polymers. [References: 23]