Phase Behavior of Poly(4-hydroxystyrene-block-styrene) Synthesized by Living Anionic Polymerization of an Acetal Protected Monomer

Autor:	Mahesh K. Mahanthappa, Daniel P. Sweat, Charles G. Fry, Dominic V. Perroni, Padma Gopalan, Myungwoong Kim, Adam K. Schmitt
Rok vydání:	2014
Předmět:	chemistry.chemical_classification Polymers and Plastics Organic Chemistry Dispersity Polymer Nuclear Overhauser effect Styrene Inorganic Chemistry chemistry.chemical_compound Monomer chemistry Polymer chemistry Materials Chemistry Alkoxy group Phenyl group Living anionic polymerization
Zdroj:	Macromolecules. 47:6302-6310
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma501126t
Popis:	We have synthesized a series of poly(4-(2-tetrahydropyranyloxy)styrene) [P(OTHPSt)] homopolymers by living anionic polymerization of the protected monomer (OTHPSt) in tetrahydrofuran at −78 °C, with excellent control over molecular weight and dispersity. The high Tg of P(OTHPSt) led to facile purification and isolation of the polymer as a powder. Characterization of the POTHPSt homopolymer by nuclear Overhauser effect spectroscopy confirms the strong preference for the axial position of the relatively sterically demanding alkoxy phenyl group. By sequential monomer addition, a series of low to high molecular weight P(OTHPSt-b-styrene) BCPs with narrow dispersities were synthesized. Quantitative deprotection of the THP groups yielded poly(4-hydroxystyrene-b-styrene) with tunable molecular weights and compositions. The solid-state and melt-phase self-assembly of these diblocks was investigated using synchrotron small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). Mean-field theory ...
Databáze:	OpenAIRE
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