Preliminary Evaluation of some Commercial Polyurethane Adhesives for Possible Weapons Applications
| Autor: | D.M. Hoffman, I.L. Chiu, F.M. Kong |
|---|---|
| Rok vydání: | 1987 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Materials science Polymers and Plastics General Chemical Engineering Materials Science (miscellaneous) Modulus Polymer chemistry.chemical_compound Differential scanning calorimetry chemistry Ultimate tensile strength Materials Chemistry Adhesive Composite material Curing (chemistry) Polyurethane |
| Zdroj: | Polymer-Plastics Technology and Engineering. 26:95-142 |
| ISSN: | 1525-6111 0360-2559 |
| DOI: | 10.1080/03602558708070096 |
| Popis: | Thirteen urethane adhesives manufacturers were contacted and asked for samples which would satisfy the purity, pot life, working time, cure time, adhesive strength, and modulus versus temperature requirements given in the introduction. Uncured adhesives supplied by these manufacturers were examined by FTIR and HPLC for isocyanate, soft segment type (ester, ether, or butadiene), and chemical composition. Based on the type of soft segment, cured adhesives were analyzed for purity and filler content. Thermogravimetric analysis was used to estimate the filler content. Dynamic viscosity screening tests were used to follow the polymerization of each adhesive and some comments regarding the correlation of this technique to pot life, working time, and gel time are given. Adhesion was measured by butt-tensile and cone-and-plate shear fixtures. Since butt-tensile strength measurements do not have a uniform tensile-stress field, ASTM D-638 tensile measurements were performed on selected systems. The hard and soft segment transitions were determined by differential scanning calorimetry and dynamic mechanical measurements. Of the systems analyzed only five were unfilled and only three contained no solvents. Two of these three had reasonable adhesion to aluminum. 34 refs., 20 figs., 9 tabs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|