| PET/PBT共混物和P(ET—BT)共聚物化学结构的各种分析方法研究 |
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| 引用本文： | 眭伟民,张菁.PET/PBT共混物和P(ET—BT)共聚物化学结构的各种分析方法研究[J].东华大学学报(自然科学版),1991(3). |
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| 作者姓名： | 眭伟民 张菁 |
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| 作者单位： | 中国纺织大学，上海合成纤维研究所 |
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| 摘 要： | 本文用红外光谱(IR)、核磁共振氢谱(~1H-NMR)、核磁共振碳谱(~(13)C-NMR)、差示扫描量热谱(DSC)、裂解色谱(PGC)和化学降解色谱(CDC)研究了PET/PBT共混物和P(ET-BT)共聚物的化学结构及其热转变,讨论了各种方法的适用性。结果表明,PGC和CDC法是组分分析最可靠的方法。~(13)C-NMR法是鉴别共混和共聚链结构的最有效手段。对于组分比的测定,CDC法最灵敏,PET和PBT的检测极限为0.5％,相对标准偏差<1％。
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| 关 键 词： | 聚酯 共聚物 裂解色谱 化学降解 核磁共振 共混(改性聚酯) |
STUDIES OF VARIOUS METHODS OF ANALYSIS FOR CHEMICAL STRUCTURE OF POLYETHYLENE TEREPHTHALATE/POLYBUTYLENE TEREPHTHALATE POLYBLEND AND POLYETHYLENE/BUTYLENE TEREPHTHALATE COPOLYMER |
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| Sui Weimin.STUDIES OF VARIOUS METHODS OF ANALYSIS FOR CHEMICAL STRUCTURE OF POLYETHYLENE TEREPHTHALATE/POLYBUTYLENE TEREPHTHALATE POLYBLEND AND POLYETHYLENE/BUTYLENE TEREPHTHALATE COPOLYMER[J].Journal of Donghua University,1991(3). |
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| Authors: | Sui Weimin |
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| Abstract: | In this paper, by means of IR, H-NMR, C-NMR, DSC, PGC, and CDC (chemical degradation chromatogiaphy), the chemical structure of polyethylene terephthalate/polybutylene terephthalate polyblend and polyethylene/butylene terephthalate copolymer and thermal conversion were studide. The suitability of various methods were discussed. PGC and CDC are the most reliable for the analysis of composition, particularly multicomponent system. C-NMR can characterize the chain structure EG-TPA-BD in copolyester, it is therefore the most effective for distinguishing polymer blend and copolymer. CDC is the most sensitive for determining composition ratio. Detection limits fof PET and PBT are 0.5%. The relative standard deviation is less than 1%. |
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| Keywords: | polyester copolymer pyrolysis chromatography chemical degradation NMR blending (modified polyester) |
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