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| Titel: |
Preparation of BPA Epoxy Resin/POSS Nanocomposites and Nonisothermal Co-curing Kinetics with MeTHPA |
| Auteur: |
Gao, Jungang Kong, Dejuan Li, Shurong |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 57 (2008) nr. 10 pagina's 940-956 |
| Jaar: |
2008-10 |
| Inhoud: |
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 α was obtained by the isoconversional method of Kissinger, and Ea is 68-78 k J/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 ∼ 0.42 and 0.52 ∼ 1.28, respectively. The curing kinetics can be described by the equations [image omitted] |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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