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Preparation of BPA epoxy Resin/POSS nanocomposites and nonisothermal co-curing kinetics with MeTHPA : Herstellung von BPA-Epoxidharz/POSS-Nanoverbundstoffen und nichtisotherme Aushärtungskinetik mit MeTHPA

Polyhedral oligomeric silsesquioxanes epoxy resin (GM-POSS) was prepared from 3-glycidyloxypropyl-trimethoxysilane (GTMS) and methyl triethoxysilane (MTES) by hydrolytic condensation. GM-POSS was characterized using liquid chromatography/mass spectrometry (LC/MS). The epoxy value of GM-POSS is 0.23... Full description

Contained in: International Journal of Polymeric Materials Vol. 57, No. 10 (2008), p. 940-956
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Links: Additional Link (dx.doi.org)
Additional Keywords: AUSHAERTEN:POLYMER
EPOXIDHARZ
NANOKRISTALLINER-VERBUNDWERKSTOFF
PHTHALSAEUREANHYDRID
REAKTIONSKINETIK
SILICON:POLYMER
DOI: 10.1080/00914030802153397
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 17 Seiten, 10 Bilder, 4 Tabellen, 22 Quellen
ID (e.g. DOI, URN): 10.1080/00914030802153397
PPN (Catalogue-ID): WTI046615040
Note: WTI TEMA DB
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520 |a Polyhedral oligomeric silsesquioxanes epoxy resin (GM-POSS) was prepared from 3-glycidyloxypropyl-trimethoxysilane (GTMS) and methyl triethoxysilane (MTES) by hydrolytic condensation. GM-POSS was characterized using liquid chromatography/mass spectrometry (LC/MS). The epoxy value of GM-POSS is 0.23 mol/100 g. The LC/MS analysis indicates that T8 and T9 cages are the majority and contain some amount of T10. The co-cured nanocomposites of BPA epoxy resin with GM-POSS using 3-methyl-tetrahydrophthalic anhydride (MeTHPA) as the curing agent were prepared and the co-curing kinetics was investigated by nonisothermal differential scanning calorimetry (DSC). The relationship between apparent activation energy Ea and the conversion alpha was obtained by the isoconversional method of Kissinger, and Ea is 68 - 78 kJ/mol. The results show that these curing reactions can be described by the Sestak-Berggren (S-B) equation, which includes two parameters, m and n. For different mass ratio of GM-POSS and BPAER, the two reaction orders, m and n, are in the range of 0.25 to approximately 0.42 and 0.52 to approximately 1.28, respectively. The curing kinetics can be described by the equations (d alpha)/(dt) = A exp (- (Ea)/(RT) alpham (1-a)n). [Taylor & Francis Group. Reproduced with permission.] 
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