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Trimethoxysilane Terminated Reaction of Aliphatic Polyester（Amide） and the Preparation of the Polyester（Amide）/SiO2 Hybrid Film

Author: DongJingBo
Tutor: ZhaoJingBo
School: Beijing University of Chemical Technology
Course: Materials Science
Keywords: Polyadipates diethylene glycol Adipic acid / diethylene glycol / ethanolamine copolymer End siloxane polymer Polymer / SiO2 hybrid materials
CLC: TB383.2
Type: Master's thesis
Year: 2006
Downloads: 66
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Abstract


Organic - inorganic hybrid materials with pure organic and inorganic materials with unique mechanical , thermal , biological , magnetic , optical and photoelectric properties , and thus become a hot topic of research in the field of materials science . Synthesized and the terminal carboxyl group of dipropylene glycol , polyethylene adipate ester (PDA) and the terminal carboxyl group of adipic acid / diethylene glycol / ethanolamine copolymer ( PDAA ) , and through them , respectively and γ- glycidyl ether oxygen trimethoxysilane (KH560) was synthesized siloxane capped polymer hybrid membranes were prepared by the moisture curing method and the sol - gel method . Meanwhile , through the determination of the acid value , hydroxyl value , epoxy value , as well as infrared spectroscopy electron microscope analysis of aggregate projected to be characterized . First, through the control on the ratio of reactive monomer successful synthesis of a the PDA and PDAA of the terminal carboxyl group of a certain molecular weight . Secondly, through the the KH560 PDA and the terminal carboxyl group PDAA capped reaction process Koh change tracking, before and after reaction of the epoxy value measurement and infrared spectroscopy confirmed that the end group siloxane reaction occurs . And such end - functionalized polymer can be stored in a sealed condition for more than three months , in the role of a catalyst , under the conditions of normal temperature and humidity can be in one or two days , a relatively short time curing film . End siloxane polymer moisture curing and sol - gel method to prepare polymer / SiO 2 hybrid materials , curing reaction was confirmed by infrared spectroscopy the system caused by the hydrolysis-condensation of the siloxane groups crosslinking caused. And electron microscopy analysis can be considered a molecular level or nanoscale hybrid composite . In this study also found that the polymer end group siloxane curing reaction rate is affected by temperature, catalyst type, catalyst content and the end group siloxane the degree of influence , and the strength of the hybrid material is mainly affected by the polymer properties the impact . In short , the sol - gel method is a synthetic polymer / SiO 2 effective method of hybrid materials , moisture curing rule of thumb is a novel method of synthetic hybrid membrane material , which is characterized by non- solvent , miscellaneous mild reaction conditions , the precursor can be stored a long time .

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