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Production of Polymers from the Seed Oil of Crambe Abyssinica. III. Polyurethane Elastomers Based on Tridecanedioic (Brassylic) Acid |
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| Authors: | K. Gidanian G. J. Howard |
| Affiliation: | 1. Department of Polymer and Fibre Science , University of Manchester Institute of Science and Technology , Manchester, M60 1QD, England;2. National Petrochemical Company , P. O. Box 2895, Tehran, Iran;3. Department of Polymer and Fibre Science , University of Manchester Institute of Science and Technology , Manchester, M60 1QD, England |
| Abstract: | A series of predominately hydroxyl-ended polyesters were made from tridecanedioic acid derived from crambe oil. Comparison materials with sebacic and adipic acids were also prepared. Suitable polyesters were converted into polyurethane elastomers by chain extension and cross-linking with a diisocyanate and further diol. Polyesters based on ethandiol were unsuitable for the production of flexible urethanes as a slow crystallization occurred on standing; this did not happen when mixed ethane- and propan-diols were employed in polyesterification. Polyurethanes based on diphenylmethane diisocyanate are stronger than those made with the mixed isomers of toluene diisocyanate. Polyurethane networks based on brassylic acid have a lower |
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