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- W2371977151 abstract "Nano SiO_2 reacted with ~y-Chloropropyl trimethoxysilane as a coupling agent,and then by quaternization with N,N-Dimethyl dodecyl amine,finally the quatemized nano SiO_2 was obtained.The nano SiO_2,intermediate product and quatemized nano SiO_2 were characterized by NMR.Quatemized nano SiO_2 was dispersed in phenolic-formaldehyde resin by mixing methods and was analyzed with DSC and TGA.The results revealed that(1) the~(29)Si MAS NMR spectrum of quatemized nano SiO_2 showed that Chloropropyl-silane and tertiary amine have bonded to the surface of nano SiO_2 successively.(2)The glass transition temperature of modified resin was raised.(3)The ratio of carbon residual of modified resin was raised.The results showed that the thermal endurance of modified PF had been improved." @default.
- W2371977151 created "2016-06-24" @default.
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- W2371977151 date "2014-01-01" @default.
- W2371977151 modified "2023-09-22" @default.
- W2371977151 title "Modification of PF by Quaternized Nano SiO_2" @default.
- W2371977151 hasPublicationYear "2014" @default.
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