id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
zc77sn03m12	Jennifer R. Weidman	Triptycene as an Architectural Motif in the Macromolecular Design of Polyimides for Gas Separation Membranes	1904		.txt	text/plain	328	13	32	Polymer membranes offer a more energy-efficient method for separations compared to many typical industrial techniques, such as distillation. This challenge can be combatted at the macromolecular level by strategically designing the polymer backbone to have bulky moieties and/or rigid, tortuous elements to disrupt polymer chain packing and increase the fractional free volume of the material.	cache/zc77sn03m12.txt	txt/zc77sn03m12.txt