A materials aging problem in theory and practice
Polyesters are widely used in plastic objects, films, and fabrics. A recurring mechanism of polyester aging is attack by humidity (hydrolysis), whereby the long chain molecules are cleaved and the material softens. This article offers an approach for modeling the hardness/aging behavior of commercia...
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| Veröffentlicht in: | Johns Hopkins APL technical digest 2000-10, Vol.21 (4), p.575-581 |
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| container_title | Johns Hopkins APL technical digest |
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| creator | Hunter, Lawrence W White, James W Cohen, Paul H Biermann, Paul J |
| description | Polyesters are widely used in plastic objects, films, and fabrics. A recurring mechanism of polyester aging is attack by humidity (hydrolysis), whereby the long chain molecules are cleaved and the material softens. This article offers an approach for modeling the hardness/aging behavior of commercial polyesters. The model is qualitatively consistent with exposure tests on fresh polyester plastic material made from a commercially available resin and hardening agent. It expresses the rate of polyester hydrolysis in terms of the relative humidity, and then connects the degree of hydrolysis to hardness using a relation that accounts for stabilizers that are present in commercial polymers to counter the hydrolysis. (Author) |
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A recurring mechanism of polyester aging is attack by humidity (hydrolysis), whereby the long chain molecules are cleaved and the material softens. This article offers an approach for modeling the hardness/aging behavior of commercial polyesters. The model is qualitatively consistent with exposure tests on fresh polyester plastic material made from a commercially available resin and hardening agent. It expresses the rate of polyester hydrolysis in terms of the relative humidity, and then connects the degree of hydrolysis to hardness using a relation that accounts for stabilizers that are present in commercial polymers to counter the hydrolysis. 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| ispartof | Johns Hopkins APL technical digest, 2000-10, Vol.21 (4), p.575-581 |
| issn | 0270-5214 |
| language | eng |
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| source | EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| title | A materials aging problem in theory and practice |
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