摘要:Development of high performance polymers was in consistant with pattern of "point-chain - sheet-matrix ".Molecular design of such polymers is placed on the agenda. Some proposals are made.
摘要:Some topics in polymer chemistry are revised. They are: (1)polymerization of 1,2-disubstituted ethylenic monomers. (2)Style of connection in vinyl polymerization. (3)Auto-acceleration in free radical polymerization. (4)Inifer and iniferter agents. (5)Hydrogen transfer and group transfer polymerization.
关键词:Auto-acceleration;Inifer agent;Iniferter agent;Hydrogen transfer polymerization;Group transfer polymerization
摘要:Catalytic hydrogenation with organic polymer-metal complexes is reviewed. These complexes are formed from soluble or insoluble organic polymers with O, N, P ligands and Rh, Pd, Pt metallic atoms.In general,polymeric catalysts are more catalytically active, stable and selective as compared to the corresponding low molecular weight ones.
摘要:A review with 87 references on synthesis, relationship between structure and electronic properties, conducting mechanism and application of conducting polymers isgiven.
摘要:Various types of non-radiant energy transfer in polymer systems, factors to effect the energy transfer, as well as the relationship between energy transfer and polymer photochemistry were reviewed with 22 references.
摘要:Super absorbent resin can absorb several hundred times as much water as its own weight. It is prepared by slightly cross-linking the water-soiuble polymer such as carboxymethyl cellulose, polyacrylic acid sodium salt or polyvinyl alcohol. Owing to its high capacity for absorbing water, high degree of water retention under pressure and high thickening power, it is widely applied to . paper diapers, underpads, water holding agents for soil, industrial dewatering agents, thickener etc.
摘要:Petroleum resin is prepared by polymerization of aliphatic olefines containing about C5 fraction or aromatic olefines containing about C9 fraction. Petroleum resin can be dissolved in various polymers to improve thir tackiness, water resisting property, chemical resistant etc. So it is widely applied to pressure-sensitive adhesive, hot-melt adhesive, traffic paint, viscosity increaser for rubber, printing ink, hydrophobic agent for paper etc.
摘要:Reaction mechanisms involved in two-step synthesis of low-molecular weight bispenol A type epoxy resin are discussed. Appronches to lower molar ratio of epichlorohydrin to bis phenol A in the synthesis are indicated.
关键词:Low molecular weight;Bisphenol A epoxy resin;Two step method