Kinetika Reaksi Curing Resin Epoksi Dengan Heksametilendiamin = Kinetics of Curing Reaction of Epoxy Resin with Hexamethylenediantine
Curing reaction of diglycidyl ether of -bisphenol A (DGEBA) with hexamethylenediamine (HMDA) is an addition reaction, forming polymer with a three-dimensional networks structure. This research studied the effect of temperature and initial concentration ratio of HMDA:DGEBA upon the rate constants. Th...
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| Format: | Article NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2004
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/23550/ http://i-lib.ugm.ac.id/jurnal/download.php?dataId=6501 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | Curing reaction of diglycidyl ether of -bisphenol A (DGEBA) with hexamethylenediamine (HMDA) is an addition reaction, forming polymer with a three-dimensional networks structure. This research studied the effect of temperature and initial concentration ratio of HMDA:DGEBA upon the rate constants. There were two rate constants: the rate constant of linear reaction (IQ) and rate constant of branch reaction (k2). This research proposed two models: Ideal model ( based on Flory theory ) and Non-ideal model ( considered structure and molecular weight }.
Experiment was carried out in a stirred batch reactor equipped with water bath. Sample was taken at certain time to determine the epoxy equivalent left. DGEBA of 60 g was used. The effect of temperature was investigated at concentration ratio of HMDA : DGEBA of 7 phr with temperature range of 30°C-50°C (5°C interval). The effect of concentration ratio HMDA:DGEBA was investigated at constant temperature of 40°C with concentration ratio range of 4 phr -16 phr ( 3 pill. interval ).
It was concluded that the Non-ideal model was more appropriate for the curing reaction of DGEBA with HMDA than the Ideal model. Beside that, Non-ideal model could predict the molecular weight distribution. The effect of reaction temperature and initial concentration ratio HMDA : DGEBA upon the-rate constants could be expressed as :
k = CAo
2.4551.105 (� `1731 i
exp 4749.24 )
T )
CB° )
k = ' 915 exp(
2.5149.1010 (�CA1 8374.75)
T )
2 C
where CAD and CB° were initial concentration of HMDA and DGEBA ( mol/L )
The average errors were 7.57% dan 31.99%, respectively.
Keywords : Curing reaction, epoxy resins, Non-ideal model |
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