Characterization of Polyurethanes Containing Different Chain Extenders
| Autor: | Francisca Arán-Aís, César Orgilés-Barceló, Elena Orgilés-Calpena, Ana M. Torró-Palau |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics General Chemical Engineering Organic Chemistry Dynamic mechanical analysis Polymer chemistry.chemical_compound Differential scanning calorimetry chemistry Natural rubber visual_art Materials Chemistry visual_art.visual_art_medium Adhesive Composite material Thermoplastic elastomer Prepolymer Polyurethane |
| Zdroj: | Progress in Rubber, Plastics and Recycling Technology. 27:145-160 |
| ISSN: | 1478-2413 1477-7606 |
| DOI: | 10.1177/147776061102700302 |
| Popis: | Several waterborne polyurethane adhesives containing different chain extenders were prepared by using the acetone process. Concretely, the polyurethane dispersions were synthesized by the prepolymer method based on three chain extenders: two diols and one diamine: 1,4-butanediol, 1,6-hexanediol and hydrazine. The adhesive solutions were characterized by flow rheology, pH measurements, particle size and solids content. The solid adhesive films were characterized by plate-plate rheology, dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). The adhesion properties were measured from T-peel test of leather/polyurethane adhesive/SBR rubber joints. As a result, the chosen chain extender influences significantly the polyurethane synthesized properties, specially determines the crystallinity of the polymer, as well as thermal and adhesive properties. Particularly, the molecular weight of the chain extender determines the structure of the synthesized polyurethanes. |
| Databáze: | OpenAIRE |
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