聚酯多元醇增容的淀粉—聚己内酯复合材料的制备与表征
发布时间：2019-03-19 15:49
【摘要】：当前不可生物降解的塑料垃圾严重危害人类的生存环境,因此制备低成本全生物降解的高分子材料势在必行。淀粉-聚己内酯复合材料是一种全生物降解的高分子复合材料。但目前存在的问题是淀粉和聚己内酯(PCL)不相容,力学性能不理想。本文采用微波法成功制备了各种不同种类不同分子量的聚酯多元醇,用聚酯多元醇合成的聚氨酯预聚体(PUP)增容淀粉-聚己内酯高分子复合材料,改善了这种高分子复合材料的界面相容性和机械性能。通过此处探索有望制备出一种低成本和性能优良的高分子复合材料。本文首先以己二酸,丁二醇为原料,钛酸四正丁酯为催化剂,二元酸与二元醇的物质的量比为1:1.2,用电脑微波催化合成萃取仪,在一定的条件下,成功合成了白色蜡状的固体聚己二酸丁二醇酯二醇(PBA),并用液体核磁共振波谱和傅立叶变换红外光谱进行了表征。相较于传统的聚酯合成的方法,该方法极大程度的缩短了合成反应的时间,安全性更高。而后通过减压蒸馏的方法,蒸馏出低沸点的水,使酯化反应进一步进行,扩大了 PBA的分子量。运用该方法快速的合成了不同分子量不同种类的聚酯多元醇。如聚己二酸乙二醇酯二醇,聚己二酸己二醇酯二醇,聚丁二酸乙二醇酯二醇,聚丁二酸丁二醇酯二醇(PBS),聚丁二酸己二醇酯二醇等。本文第三章利用合成的数均分子量为1338的聚己二酸己二醇酯二醇与4, 4'-二苯基甲烷二异氰酸酯反应,合成聚氨酯预聚体(PHAPU),然后将其与淀粉、聚己内酯在密炼机中熔融混合,制备了一系列的复合材料。在恒温箱中平衡一天后,对复合材料进行傅里叶红外测试和拉力测试,结果显示,加入不同含量的聚酯基聚氨酯预聚体的淀粉—聚己内酯复合材料的相容性和力学性能得到了提高。
[Abstract]:At present, non-biodegradable plastic waste seriously endangers the living environment of human beings, so it is imperative to prepare low-cost fully biodegradable polymer materials. Starch-polycaprolactone composite is a kind of biodegradable polymer composite. However, the existing problem is that starch and polycaprolactone (PCL) are incompatible, and the mechanical properties are not ideal. In this paper, various kinds of polyester polyols with different molecular weights were successfully prepared by microwave method, and polyurethane prepolymer (PUP)-polycaprolactone polymer composites were prepared. The interfacial compatibility and mechanical properties of the polymer composites were improved. A kind of polymer composite with low cost and excellent performance is expected to be prepared in this paper. In this paper, using adipic acid, butanediol as raw material and tetrabutyl titanate as catalyst, the molar ratio of dicarboxylic acid to diol is 1 / 1.2. The extractor is synthesized by computer microwave catalysis under certain conditions. White waxy solid poly (butylene adipate) diol (PBA), was successfully synthesized and characterized by liquid nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy. Compared with the traditional method of polyester synthesis, this method greatly shortens the reaction time and has higher safety. Then the low boiling point water was distilled by vacuum distillation. The esterification reaction was further carried out and the molecular weight of PBA was enlarged. Polyester polyols with different molecular weights and different kinds of polyols were rapidly synthesized by this method. Such as poly (ethylene glycol adipate), poly (hexanediol adipate) diol, poly (ethylene glycol succinate), poly (butylene succinate) diol (PBS), poly (hexanediol succinate) diol and so on. In the third chapter, the polyurethane prepolymer (PHAPU), was synthesized by the reaction of 4,4-diphenyl methane diisocyanate with the synthesized poly (hexanediol adipate) with a molecular weight of 1338, and then reacted with starch. A series of composites were prepared by melt mixing of polycaprolactone in mixer. After one day's balance in the thermostat, the composites were tested by Fourier transform infrared (FTIR) and tensile test. The results showed that: The compatibility and mechanical properties of starch-polycaprolactone composites with different content of polyester-based polyurethane prepolymer were improved.
【学位授予单位】：华中师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ317;TB332
本文编号：2443663
[Abstract]:At present, non-biodegradable plastic waste seriously endangers the living environment of human beings, so it is imperative to prepare low-cost fully biodegradable polymer materials. Starch-polycaprolactone composite is a kind of biodegradable polymer composite. However, the existing problem is that starch and polycaprolactone (PCL) are incompatible, and the mechanical properties are not ideal. In this paper, various kinds of polyester polyols with different molecular weights were successfully prepared by microwave method, and polyurethane prepolymer (PUP)-polycaprolactone polymer composites were prepared. The interfacial compatibility and mechanical properties of the polymer composites were improved. A kind of polymer composite with low cost and excellent performance is expected to be prepared in this paper. In this paper, using adipic acid, butanediol as raw material and tetrabutyl titanate as catalyst, the molar ratio of dicarboxylic acid to diol is 1 / 1.2. The extractor is synthesized by computer microwave catalysis under certain conditions. White waxy solid poly (butylene adipate) diol (PBA), was successfully synthesized and characterized by liquid nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy. Compared with the traditional method of polyester synthesis, this method greatly shortens the reaction time and has higher safety. Then the low boiling point water was distilled by vacuum distillation. The esterification reaction was further carried out and the molecular weight of PBA was enlarged. Polyester polyols with different molecular weights and different kinds of polyols were rapidly synthesized by this method. Such as poly (ethylene glycol adipate), poly (hexanediol adipate) diol, poly (ethylene glycol succinate), poly (butylene succinate) diol (PBS), poly (hexanediol succinate) diol and so on. In the third chapter, the polyurethane prepolymer (PHAPU), was synthesized by the reaction of 4,4-diphenyl methane diisocyanate with the synthesized poly (hexanediol adipate) with a molecular weight of 1338, and then reacted with starch. A series of composites were prepared by melt mixing of polycaprolactone in mixer. After one day's balance in the thermostat, the composites were tested by Fourier transform infrared (FTIR) and tensile test. The results showed that: The compatibility and mechanical properties of starch-polycaprolactone composites with different content of polyester-based polyurethane prepolymer were improved.
【学位授予单位】：华中师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ317;TB332
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