| STUDIES ON SEQUENCE STRUCTURE OF PET/PHB COPOLYESTERS |
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| 引用本文： | 王华平,关桂荷,章悦庭,周涵新,孙桐. STUDIES ON SEQUENCE STRUCTURE OF PET/PHB COPOLYESTERS[J]. 东华大学学报(英文版), 1993, 0(2) |
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| 作者姓名： | 王华平 关桂荷 章悦庭 周涵新 孙桐 |
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| 作者单位： | Department of Chemical-fiber Technology，Department of Chemical-fiber Technology，Department of Chemical-fiber Technology，Department of Chemical-fiber Technology，Department of Chemical-fiber Technology |
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| 摘 要： | In this paper,the sequence distribution in the copolyester made from polyethyleneterephthalate (PET) and p-hydroxybenzoic acid (PHB) at 290℃has been investigated by 400MHz ~1H-NMR.It has been found that reference factor m of PET/PHB copo!yester linearly de-creases when PHB molar fraction increases.In addition,a series of sequence structure parameters,such as PET,PHB segment mean length,randomness,etc.are calculated from a probability modelby m,X_(PHB)%.This copolyester made at 290℃ is found to be nearer to that of completely randomcopolymer compared with that of the eopolyester made at 270℃,as in the case of the generalcopolycondensation.PHB-rich phase is formed only when PHB per number≥4,basing on thisconclusion,we establish the relationship between theoretical contents of PHB-rich phaseW_(PHB)% and PHB contents X_(PHB)% :W_(PHB)%=104.0X_(PHB)~(4.40) The minimum PHB-rich phase con-tent forming liquid crystal phase is 1.1% wt.
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STUDIES ON SEQUENCE STRUCTURE OF PET/PHB COPOLYESTERS |
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| Wang Huaping Guan Guihe Zhang Yueting Zhou Hanxing Sun Tong. STUDIES ON SEQUENCE STRUCTURE OF PET/PHB COPOLYESTERS[J]. Journal of Donghua University, 1993, 0(2) |
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| Authors: | Wang Huaping Guan Guihe Zhang Yueting Zhou Hanxing Sun Tong |
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| Affiliation: | Department of Chemical-fiber Technology |
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| Abstract: | |
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| Keywords: | copolymers liquid crystals sequences distribution nuclear magnetic resonance polyethylene terephthalate P-hydroxybenzoic acid reference factor |
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