Use of SAXS to Characterize the Morphology ofPoly(polyethylene glycol diacrylate)/Epoxy ResinInterpenetrating Networks
✍ Scribed by Tan, Susheng; Zhang, Donghua; Zhou, Enle
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 242 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0959-8103
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✦ Synopsis
Interpenetrating polymer networks (IPNs) have been synthesized from prepolymers that form miscible blends. All IPNs made from polyacrylate ((polyethylene glycol diacrylate), PEGDA) and epoxy (diglycidyl ether of bisphenol A, DGEBA) can be made in phase separated states by incorporating crosslinks. However, blends of these prepolymers, having a negative FloryÈHuggins interaction parameter, are highly miscible. This indicates that formation of IPNs favours phase separation relative to blends. The microphase separation characteristics in the PEGDA/DGEBA IPNs were determined using small-angle X-ray scattering (SAXS). The DebyeÈBueche and Guinier methods were used to calculate the correlation lengths of the segregated phases existing in the PEGDA/ DGEBA IPNs. The results from SAXS showed that the size of the phase segregation zones changed with composition from about 50 to 100 Ó.