Accession Number:
ADA263189
Title:
Selectivity and Permeability of Microporous Block Copolymer Membranes
Descriptive Note:
Technical rept.
Corporate Author:
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMICAL ENGINEERING
Personal Author(s):
Report Date:
1993-04-16
Pagination or Media Count:
15.0
Abstract:
A selective solvent was used to develop a uniform microporous structure in a polystyrene-polymethylmethacrylate block copolymer. Pore diameters in the range of 200-500 angstroms were produced. Gas permeation measurements demonstrated a dramatic, five order of magnitude, increase in permeability coefficient associated with the throughgoing microporous structure. These high-flux membranes retained some selectivity for certain gas pairs as expected for transport based on Knudsen diffusion in the porous materials.... Microporous membranes, Gas separations, Knudsen diffusion, Block copolymers.
Descriptors:
Subject Categories:
- Physical Chemistry
- Polymer Chemistry