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| Titel: |
Preparation and Properties of Silane End-capped Polyimide Adhesives: Structure-Property Relationship |
| Auteur: |
Samant, S. M. Babu, G. N. Murthy, M. V. R. |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 9 (1982) nr. 3-4 pagina's 225-238 |
| Jaar: |
1982-08-01 |
| Inhoud: |
High temperature resistant adhesives consisting of silane end-capped polyimides were prepared by reacting anhydride terminated poly(amic-acid), obtained from pyromellitic dianhydride and a diamine (diaminodiphenyl methane, diaminodiphenyl ether, p-phenylenediamine, or benzidine), with an aminosilane in dimethylformamide. The polymers were precipitated in toluene and thermally cyclized to the corresponding polyimides. Polymers were characterized by viscosity, infrared, X-ray diffraction patterns and thermogravimetric analysis. The presence of silane was confirmed by silicon estimation and IR. The polymers were isothermally aged at various temperatures and the extent of degradation was established by IR. The poly(amic-acid) solutions were brushed onto the surface of chemically oxidized or anodized aluminium panels. Curing was done at 150 psi for varying periods of time and at different temperatures. Lap shear strengths of adhesives were determined. Effects of curing time, temperature, silane incorporation and nature of diamine were evaluated. Panels were aged for prolonged periods of time at high temperatures to analyse the effect of structure on lap shear strength. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 6 van 8 gevonden artikelen
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