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测试与分析                                      高俊·环保增塑剂 TBC 的合成以及其对环保体系 PLA/PCL 影响


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                     Synthesis of environmental plasticizer TBC and its influence on
                                     PLA/PCL environmental protective system


                                                            Gao Jun
                       (College of Mechanical Engineering, Ezhou Vocational University, Ezhou 43600, Hubei, China)

                    Abstract: Tributyl citrate (TBC), an environmental plasticizer, was prepared from citric acid and n-butanol
                with p-toluene sulfonic acid as catalyst. The structure of TBC was characterized by H-NMR and FI-IR. Then
                TBC was blended with PLA/PCL to prepare biodegradable blends. The thermal properties of the blends
                were studied by differential scanning calorimetry, which showed that TBC could significantly improve the
                crystallization ability of PLA/PCL system. The mechanical properties of the blends were tested by tensile test.
                The results showed that TBC increased the elongation at break of PLA/PCL system. The extraction resistance
                of the blends was tested by using deionized water and anhydrous ethanol as solvents. The results showed that
                TBC could be extracted by solvents. The weight loss rate of the blends in deionized water for 5 weeks was 0.64%,
                and that in absolute ethanol for 5 weeks was 1.91%.
                    Key words: tributyl citrate; PLA/PCL blends; biodegradable; thermal property; mechanical property;
                extraction resistance
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                2019     第   45 卷                                                                      ·59·
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