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| Content Provider | Springer Nature Link |
|---|---|
| Author | Han, Hongzhe Gao, Jungang Li, Na Hou, Guixiang Huo, Li |
| Copyright Year | 2015 |
| Abstract | Glycidyloxypropyl-polyhedral oligomeric silsesquioxanes (G-POSS) were prepared from 3-glycidyloxypropyl-trimethoxysilane (GTMS) by hydrolytic condensation. The hybrid cationic thermal polymerization of G-POSS with bisphenol A epoxy resin (E-51) using diphenyliodonium fluoride borate (DPI·BF4) as a cationic initiator and benzoyl peroxide (BPO) as a co-initiator was investigated by DSC and FTIR. The structure of G-POSS was characterized by liquid chromatography–mass spectrometry (LC/MSD), FTIR and NMR. The effect of BPO content on reaction system, the distribution of G-POSS in the curing system, curing reaction activation energy E $_{a}$ and dynamic mechanical properties of the E51/G-POSS nanocomposites were characterized. The results showed that octa(3-glycidyloxypropyl)-POSS (G-POSS) had been synthesized and displayed uniform dispersion in E51/G-POSS curing system. The DPI·BF$_{4}$, which was capable to initiate the thermal ring-opening curing of epoxy resin, showed an initial curing temperature of epoxy resin decreased by 54.7 °C when the added amount of BPO was 2 wt%. The reaction process was well accorded with Kissinger’s kinetics model, and the average curing reaction activation energy E $_{a}$ was increased as the content of G-POSS increased. The T $_{g}$ and storage modulus of the E-51/G-POSS nanocomposites reached its optimum when the content of G-POSS was 2 wt%. The T $_{g}$ of nanocomposite was 8.3 °C higher than that of the pure epoxy resin. The T $_{g}$ and storage modulus decreased with the further increasing of G-POSS content. |
| Starting Page | 299 |
| Ending Page | 307 |
| Page Count | 9 |
| File Format | |
| ISSN | 10261265 |
| Journal | Iranian Polymer Journal |
| Volume Number | 24 |
| Issue Number | 4 |
| e-ISSN | 17355265 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2015-03-12 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Hybrid composites Polymer Sciences Epoxy resin Ceramics, Glass, Composites, Natural Methods Silsesquioxanes Thermomechanical properties Cationic ring-opening polymerization |
| Content Type | Text |
| Resource Type | Article |
| Subject | Materials Chemistry Chemical Engineering Polymers and Plastics |
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