Manipulating the Thermoresponsive Behavior of Poly(N-isopropylacrylamide). 1. On the Conformational Behavior of a Series ofN-Isopropylacrylamide−Styrene Statistical Copolymers

摘要: Fluorescence techniques, including time-resolved (fluorescence) anisotropy (TRAMS), have been used to study the effects of hydrophobic modification upon thermoresponsive behavior NIPAM-based polymers. Incorporation styrene, through statistical free radical copolymerization, changes hydrophobic/hydrophilic balance macromolecule and lowers lower critical solution temperature (LCST) system. Unfortunately, although simple copolymerization with styrene can be manipulate system's LCST characteristics, polymer loses its ability release solubilized guests below point. This results from formation intramolecular aggregates between styryl residues chain, which accommodate guest solutes. is a serious limitation this form chemical if aim produce smart materials for controlled solubilization at specific temperatures.