Controlled shrinkage polymers: Characterization of epoxy resins cured with spirobislactones
| Autor: | Robert F. Brady, Allison M. Sikes |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
chemistry.chemical_classification
Bisphenol A Materials science Diglycidyl ether Polymers and Plastics Tertiary amine Organic Chemistry Polymer Epoxy chemistry.chemical_compound chemistry Polymerization visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium Organic chemistry Curing (chemistry) Shrinkage |
| Zdroj: | Journal of Polymer Science Part A: Polymer Chemistry. 28:2533-2546 |
| ISSN: | 1099-0518 0887-624X |
| DOI: | 10.1002/pola.1990.080280925 |
| Popis: | The diglycidyl ether of bisphenol A (DGEBA) was cured with either an aliphatic or an aromatic spirobislactone using a tertiary amine catalyst. The products were characterized by FTIR, TGA, DSC, dilatometry, and single-fiber adhesion measurements, and their performance was compared to that of DGEBA cured with acid anhydrides. Both aliphatic and aromatic bislactones are effective curing agents for DGEBA. FTIR and dilatometry confirm that both lactone rings open early in the curing reaction and initially offset shrinkage caused by polymerization. After the bislactone has been consumed, oxirane reactions proceed in a normal fashion. The final shrinkage of cured DGEBA polymers, with or without addition of bislactones, is 3.0–3.5%. Bislactone-modified materials possess superior thermal properties, when compared to those of anhydride-cured materials. |
| Databáze: | OpenAIRE |
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