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In this thesis, using paraformaldehyde and phenol was synthesized from a phenolic resin can be made , and resin prepared phenolic foam insulation materials . First, by FTIR analysis hydroxymethyl index and hot stage method analysis The method of the gelation time , reaction time , reaction temperature , paraformaldehyde , and phenol molar ratio and reaction conditions , catalyst type , etc. on the resin structure , the activity of . Using a rotational viscometer analysis of the change of the resin viscosity and the solids content with the reaction conditions . The results show that : increasing reaction time , the phenolic resin CH 2 OH index increased gradually shorter , gelation time , the viscosity of the resin , the solid content is gradually increased with the reaction time ; reaction temperature is increased , hydroxyalkyl methyl index decreased , the gelation time is sequentially reduced ; was raised to 2.6 ( from 1.8 ) with the increase in the proportion of paraformaldehyde with a phenol , phenol resin , hydroxymethyl index increasing (1.5 ~ 3.1) , the gelation time gradually reduced, the resin viscosity and the solids content increases first and then decreases , the increase in the content of free formaldehyde in the resin ; with KOH the gelling time of the synthetic resin ratio of NaOH in length, catalyst type on the resultant structure , the resin viscosity and solids content than small. Secondly, the use of the Arrhenius equation to calculate the activation energy of the curing reaction , i.e. paraformaldehyde / phenol molar ratio of 1.8 NaOH ( 20 % aqueous solution) and phenol molar ratio of 0.04, the curing reaction of the activation energy 73.846kJ/mol . Then, the synthetic resin is prepared as a phenolic foam, the resin structure of the foam properties . The experimental results : reaction time , increase the the phenolic foam curing time is reduced ;
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