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 relati...
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.
