| Use of renewable resources of corn production of polyester chemicals -glycol, propylene glycol, is the support of the State Development and Reform Commission, which reduce the dependence on oil resources, and promote the sustainable development of polyester industry is of great significance. In the year 2005, with independent technique in nation, Dacheng group which in Changchun and Donghua University took the lead in taking corn as main raw material, such as glycol (for short corn-EG), propylene glycol and butylenes glycol to fabricate industrial polyester. There is a little amount of propylene glycol, butylenes glycol and other dibasic alcohol in corn-EG. It was used with the mature polymerization techniques in hand to copolymerize poly-dihydricalcohols terephthalate (for short PDT) which was made mainly by EG. Proportionable by the quantity, there is still two-part raw material of dibasic acid came from petroleum industry. In this research, a commission of the two-part quantity dualistic acid in the raw material of polyester whether it can be replaced by other dualistic acid which also came from renewable resources (for example : succinic acid(for short SA)). If succeed , it will accord with our polyester industry which is decrease the dependence of petroleum raw material for the development of our economy , The experimental results will be the decision-makers in business and the revitalization of the northeast industrial projects (development succinate) to provide a choice of reference.The main purpose of this research is to explore how much PTA can be replaced by SA, with Polymerization equipment in existence, and the modifying copolymerization(PSET) textile spinning-ability and chromaticity ;and also polyester fiber structure changes.To accelerate the pace of industrialization, the paper completed the first six liters laboratory autoclave tests on a series of copolymerization(PSET): corn will glycol (EG) and succinic acid (SA), the PTA for copolymerization system in a series of copolyester(PSET); research SA addition on the structure and properties of polyester(PSET) impact; DSC, infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR), and other testing methods confirmed the copolymer was successful. At the same time that: in PET macromolecular chains, after the introduction of SA into random copolymer molecules, glass transition temperature (T_g), the crystallization temperature (T_c), and the melting point (T_m) had all declined.Then, the paper gave the kettle 30 L 10 kg-class series polymerization, and a biopsy polymerization spinning and dyeing experiment. Results obtained: 1) With the increase in SA, the difficulty of polymerization increased; when the PTA: SA mol ratio of 1: 1 (close to the regulation, such as copolymer), the polymerization was difficult; 2) by adding 0.1% nano - silica is conducive polymerization; 3) As long as containing a total of 5% SA has been better than PET polyester on the spinning performance and dyeing properties, its uptake, color fastness, and the degree of wear-resistant was better than the pure PET.Finally, On the Basis of study above, this paper completed 15-tonne industrial polymerization pilot of 5% SA corn-glycol copolyester (PSET), and high-speed spinning POY industrialized test.The results show that: corn-EG can be totally used to complete polyester fiber industry; by adding a small amount of succinate, the nanoparticles were modified polyester(PSET) fiber is superior to the spinnability PET; the polyester(PSET) fiber can be dyed with normal pressure boiling. Thus, the paper Changchun Dacheng Group for 200,000 tons corn dihydric alcohol market after the commissioning of the project provides a high-quality development of a new type of copolymer fiber. |
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