The preparation and properties of asymmetric poly(vinyldiene fluoride)(PVDF)membranes are described in this study.Membranes were prepared from a casting solution of PVDF,N,N-dimethylacetamide(DMAc)solvent and water- soluble poly(ethylene glycol)(PEG)additives by immersing them in water as coagulant medium.Experiments showed that when PEG molecular weight increased,the changes in the resultant membranes morphologies and properties showed a transition point at PEG6000.This indicated that PEG with a relativel...
Propene/1-decene copolymers （P-co-D） were synthesized by means of slurry polymerization process under atmospheric pressure using Ziegler-Natta catalyst （MgCl2/TiCl4/AlEt3）. The random P-co-Ds were elastic, low-crystalline, thermally stable and therefore suitable to be used as membrane materials in organophilic pervaporation with chloroform/water mixture. Its mechanical strength is better than polydimethylsiloxane （PDMS）. The correlation between structural parameters （glass transition temperature and crystallinity） and properties of organophilic pervaporation were investigated.
