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Vapor/Liquid/Solid Multiphase Photopolymerization of Vinyl Acetate

Author: KongLingBing
Tutor: YangWanTai
School: Beijing University of Chemical Technology
Course: Polymer Chemistry and Physics
Keywords: Gas / solids Liquid / solid Gas / liquid / solid Hyperbranched Photopolymerization Vinyl acetate Benzophenone Triethanolamine
CLC: O644.1
Type: Master's thesis
Year: 2006
Downloads: 78
Quote: 0
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Abstract


Monomer photopolymerizable means itself or in the photoinitiating agent is present due to light-induced polymerization , having a polymerization reaction to the desired activation energy characteristics of low , can be obtained does not contain the pure polymer initiator residues , is very conducive for further research ; homogeneous and heterogeneous gas phase component and two component polymerization system paid close attention to its active characteristics and controllability ; On the other hand , the synthesis of hyperbranched polymers developed more than twenty years , its synthesis method is still only applicable to a limited number of specific monomers , it is necessary to develop a method applicable to common monomer . Based on the above three areas , designed a series of multiphase multicomponent photopolymerization system : gas / solid system , liquid / solid system and gas / liquid / solid system . The research oriented aggregation rules for gas / solid system and gas / liquid / solid system , and further use of the gas / liquid / solid system developed hyperbranched polymer synthesis method applicable to common vinyl monomers . The main tasks are as follows : 1 , designed two sets of gas-solid light polymerization system . The original gas-solid polymerization system , the vinyl acetate monomer, by UV initiator and triethanolamine / benzophenone The method of initiation system in the BOPP film and the glass surface are directly obtained vinyl acetate (VAc) polymer , the molecular weight of the polymer , molecular weight distribution , degree of crosslinking , the aggregation phenomena ; using improved reactor , the degree of crosslinking of the polymer was studied and found that to obtain more than 95% of the degree of crosslinking of the polymer can be easily film. Also designed sets liquid-solid photopolymerization system , vinyl acetate monomer , but the result is not satisfactory , no further in-depth study . 2, designed two sets of gas-liquid-solid polymerization system , set for homopolymerization , set for the copolymerization . These two systems so that the ultraviolet transmittance is constant and does not exist to achieve a polymerization process With

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Photochemical,radiation chemical,ultrasonic,the role of chemical processes > Photochemical
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