Publicação
A contribution to the study of the hydrolysis of poli(epslilon-caprolactone).
| Resumo: | Many polymeric materials suffer hydrolysis when in direct contact with water. The study of this process is of great importance, not only for knowing the behaviour of the polymer but also to help prevent that undesirable phenomena. To study whether the polymeric material poly--caprolactone suffers hydrolysis, the sample was kept in water for some days and was weighted every day to determine the weight loss. In order to accelerate the process of hydrolysis the samples were kept in a thermal bath. The experiment was carried out for 23 days and the results are presented in table 1. From this work it is possible to infer that in fact, when submitted for a period of 3 weeks to a thermal bath of water at 50ºC, the polymeric tablets suffered a loss of weight of about 0.4%. That weight loss is most likely due to the decomposition of some molecules of the polymer by the action of the water molecules in an hydrolysis process. |
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| Autores principais: | Guiné, Raquel |
| Assunto: | Polymer |
| Ano: | 1998 |
| País: | Portugal |
| Tipo de documento: | documento de conferência |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Viseu |
| Idioma: | inglês |
| Origem: | Repositório Científico do Instituto Politécnico de Viseu |
| Resumo: | Many polymeric materials suffer hydrolysis when in direct contact with water. The study of this process is of great importance, not only for knowing the behaviour of the polymer but also to help prevent that undesirable phenomena. To study whether the polymeric material poly--caprolactone suffers hydrolysis, the sample was kept in water for some days and was weighted every day to determine the weight loss. In order to accelerate the process of hydrolysis the samples were kept in a thermal bath. The experiment was carried out for 23 days and the results are presented in table 1. From this work it is possible to infer that in fact, when submitted for a period of 3 weeks to a thermal bath of water at 50ºC, the polymeric tablets suffered a loss of weight of about 0.4%. That weight loss is most likely due to the decomposition of some molecules of the polymer by the action of the water molecules in an hydrolysis process. |
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