摘要:Dynamic infrared spectroscopy is an extremely valuable tool to study deformation and relaxation phenomena in-situ to the mechanical treatment of polymer. This review is intended to describe the experimental technique and recent application of some polymer systems.
摘要:2D NMR A progress in polymer NMR spectroscopy is introduced. It comprises how to measure the polymer sequance lengths, the structures of copolymers, the compatibil ity in polymer, blends, the orientational order of polymer liquid crystals, the molecular weight, the shor-chain and long-chain branchings, the polymorphs of solid state polymers.
关键词:2d-NMR;Polymer structures;Polymer sequance lengths;Compatibility in polymer blends;Orientational order of polymer liquid crystals;Short-chain and long-hain branchings;Polymorphs of solid state polymers
摘要:This review covers the development, recent research progress and the major characteristics about the cationic photopolymerization initiated with Iodonium salts and sulfonium salts. The mechanism of the photoinnnitiation and the factors which affect the efficiency of initiation, as well as the composition and application of the related UV-curable system are described.
摘要:A review of polymeric effect has been examined by many distinguished examples. The polymeric effect is comprised by the mechanical support action of polymeric bone, the effect of neighbouring groups, synergistic effect, template polymerization and so on.
摘要:Some outstanding properties of PEN-2,6,such as rigidity,heat resistance, fluorescence and so on, could be ascribed to its aromaticity and stiffness of molecular chains. People have studied this functional material by many means since 1967.Some phenomena of PEN-2,6 have been observed and explained. The researches on PEN-2,6 we sum up here are especially on photophysics, photochemistry and electrical conduction.
摘要:The purpose of this paper is to discuss some of the recent advances in plasma polymerization of hydrocarbons, nitrogen or oxygen containing organic monomers, fluorocarbons, organosilicon compounds and in applications of the plasma polymerized thin films as reverse osmosis membranes, separation membranes, coatings, etc.
摘要:General definition of ion exchange resins, history, compositions, classifications, fundamentals of ion exchange, methods of preparations and properties of ion exchange resins are bliefly illustrated. Uarions applications are tableted and advantages and disadvantages are disenssed. The development are demonstrated.