Pervaporation for separating benzene/cyclohexane mixture by P(AA-MA) copolymer membranes
(288-295)  Chinese Journal of Polymer Science 29, #3 (2011)|

Pervaporation for separating benzene/cyclohexane mixture by P(AA-MA) copolymer membranes
(288-287)  Chinese Journal of Polymer Science 29, #2 (2011)
Xu and Zhu of Zhejiang University, China, synthesized copolymers composed of acrylic acid and methyl acrylate with different molecular weights and sequence structures combination of ATRP and selective hydrolysis.  These copolymers were used as membrane materials to separate benzene/cyclohexane mixture by pervaporation.  For the random copolymers, the permeate flux decreased rapidly with the increasing of molecular weight.  The separation factor was also influenced by the molecular weight, which was changed from no selectivity to cyclohexane selectivity with increasing the molecular weight.  Contrarily, the block copolymer membrane showed good benzene selectivity with separation factor of 4.3 and permeate flux of 157 g/(m2h) to 50 wt% benzene/cyclohexane mixture.  (RDC 4/13/2011)