| Synthesis and Characterization of Aliphatic-Aromatic Hyperbranched Polyesters |
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| 引用本文： | 唐黎明,张晓龙,邱藤,刘德山. Synthesis and Characterization of Aliphatic-Aromatic Hyperbranched Polyesters[J]. 清华大学学报, 2002, 7(1) |
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| 作者姓名： | 唐黎明 张晓龙 邱藤 刘德山 |
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| 作者单位： | TANG Liming ，ZHANG Xiaolong，QIU Teng，LIU Deshan Department of Chemical Engineering，Tsinghua University，Beijing 100084，China |
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| 摘 要： | IntroductionHyperbranched polymers have gained muchresearch interest in the last ten years.They aremainly prepared by polycondensation of AB2monomers at high temperature under reducedpressure.Compared with their linearanalogs,theyshow lower viscosity and higher solubility,and con-tain more end- groups.These unique chemophysicalproperties make them useful candidates forviscosity modificators,ultraviolet spectroscopy( UV ) - radiation coatings,membranes,etc.[115]Recently,all- aromatic hyperbra…
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Synthesis and Characterization of Aliphatic-Aromatic Hyperbranched Polyesters |
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| Abstract: | Hyperbranched polymers possess special architectures and have potential applications in various areas. In this study, two AB2 monomers, dipropyl 5-(hydroxyethoxy) isophthalate (I) and 5-hydroxyethoxyisophthaic acid (II), were prepared. By bulk polycondensation of each monomer, two aliphatic-aromatic hyperbranched polyesters were prepared and characterized by 1H-nuclear magnetic resonance (1H-NMR), differential scanning calorimetry (DSC), thermogravimetry analysis (TGA), and scanning electron microscopy (SEM). Compared with all-aromatic hyperbranched polyesters, the prepared polymers showed lower glass transition temperatures in connection with the moderate decrease in their decomposition temperatures. |
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| Keywords: | hyperbranched polyesters synthesis characterization |
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