| WHOLLY-AROMATIC COPOLYESTERS CONTAINING IPA, 2.6-NDA, TPA, CLHQA AND PABA MONOMERS |
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| 作者姓名： | 张守中 王乐 屈凤珍 孙刚 |
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| 作者单位： | Department of Textile Chemistry，Textile Institute of Shanghai University of Engineering Science，Department of Textile Chemistry，Department of Textile Chemistry |
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| 摘 要： | The crystallinities, thermal properties, liquid crystal properties and rheologic properties oftwo series of the aromatic copolyesters are studied. One of them is composed of IPA, 2,6-NDA,CLHQA, PABA and. the other composed of TPA, 2.6-NDA, CLHQA, IPA. The results showthat the crystallinities of the aromatic copolyesters are relatively low and the melting point of thecopolyesters decreases with an increase of the unsymmetrical contents. These two series of aro-matic copolyesters are both suitable for the conventional melt spinning process and have a goodfiber forming property and a good thermal stability. The viscosities of aromatic copolyestermelts are greatly affected by the shear rate, hence the so-called" thinning under shearing" phe-nomenon. The melts have a rather high viscosity flow activation energy and a relatively lowelasticity.
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WHOLLY-AROMATIC COPOLYESTERS CONTAINING IPA, 2.6-NDA, TPA, CLHQA AND PABA MONOMERS |
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| Zhang Shouzhong Wang Le Qu Fengzhen Sun Gang.WHOLLY-AROMATIC COPOLYESTERS CONTAINING IPA, 2.6-NDA, TPA, CLHQA AND PABA MONOMERS[J].Journal of Donghua University,1989(1). |
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| Authors: | Zhang Shouzhong Wang Le Qu Fengzhen Sun Gang |
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| Institution: | Zhang Shouzhong Wang Le* Qu Fengzhen Sun Gang Department of Textile Chemistry **Textile Institute of Shanghai University of Engineering Science |
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| Abstract: | The crystallinities, thermal properties, liquid crystal properties and rheologic properties of two series of the aromatic copolyesters are studied. One of them is composed of IPA, 2,6-NDA, CLHQA, PABA and. the other composed of TPA, 2.6-NDA, CLHQA, IPA. The results show that the crystallinities of the aromatic copolyesters are relatively low and the melting point of the copolyesters decreases with an increase of the unsymmetrical contents. These two series of aro- matic copolyesters are both suitable for the conventional melt spinning process and have a good fiber forming property and a good thermal stability. The viscosities of aromatic copolyester melts are greatly affected by the shear rate, hence the so-called" thinning under shearing" phe- nomenon. The melts have a rather high viscosity flow activation energy and a relatively low elasticity. |
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| Keywords: | Aromatic ester crystallinity thermodynamic properties rheological property thinning under shearing |
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