Method for preparing polyester through using 10-hendecenoic acid and vanillic acid

A technology of carbenoic acid and vanillic acid, applied in the field of renewable resource utilization and green synthesis, can solve the problems such as hindering the application of renewable resources, complicated separation process, long reaction time, etc., and achieves easy structure and function diversification, raw materials. Wide range of sources, good thermal stability

Inactive Publication Date: 2013-09-25
NANKAI UNIV
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Problems solved by technology

However, there are many defects in the traditional method of preparing polyols from 10-undecenoic acid, mainly in the following aspects: a variety of organic solvents are used in the reaction process, and the reaction time is long, the separation process is cumbersome, the yield is low, and some Some toxic and expensive reagents will be used, which will seriously hinder the application of renewable resources in polymer materials

Method used

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Embodiment

[0027] A method for preparing polyester based on 10-undecylenic acid and vanillic acid, using 10-undecylenic acid and vanillic acid as raw materials, using n-butyl titanate as a catalyst, and realizing it under high temperature and high vacuum conditions Ontology aggregation, the steps are as follows:

[0028] 1) Preparation of 10-undecen-1-ol from 10-undecenoic acid

[0029] Dissolve 1.84 g (10.0 mmol) of 10-undecenoic acid in 20.0 mL of anhydrous tetrahydrofuran in the reaction flask, place the reaction flask in an ice-water bath, slowly add 0.94 g of lithium tetrahydrogen aluminum within 30 min, remove In an ice-water bath, react at room temperature for another 3 h, then reflux for 1 h. After the reaction was completed, 50 mL of distilled water and 100 mL of 2 M hydrochloric acid were successively added to the reaction system, extracted three times with 50 mL of ethyl acetate, the organic phase was washed with saturated NaCl solution and distilled water, and dried over anh...

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Abstract

A method for preparing polyester through using 10-hendecenoic acid and vanillic acid is characterized in that bulk polymerization is realized with vegetable oil based unsaturated fatty acid and vanillic acid as raw materials and n-butyl titanate as a catalyst under high-temperature high-vacuum conditions, and comprises the following steps: 1, preparing 11-(3-hydroxypropylmercapto)-undecenyl-1-ol from 10-hendecenoic acid; 2, preparing dimethyl vanillate from methyl vanillate; and 3, preparing degradable polyester from 11-(3-hydroxypropylmercapto)-undecenyl-1-ol and dimethyl vanillate. The method has the advantages of wide sources and low prices of the raw materials, regenerability and low production cost; the synthetic technology of polyester has the advantages of simplicity, easy operation, environmental protection, high yield, and benefiting for the industrialized production; and the prepared polyester material has the advantages of good thermal stability, adjustable performances, easy realization of the structural and functional diversification, realization of the performances comparable to the petroleum raw material based polyester, and possible large-scale production.

Description

technical field [0001] The invention relates to the technical field of renewable resource utilization and green synthesis, in particular to a method for preparing polyester by using 10-undecenoic acid and vanillic acid. Background technique [0002] Polyester is a general term for polymers obtained by polycondensation of polyols and polyacids. It is a class of engineering plastics with excellent performance and wide range of uses. It can be made into fibers and films. It is widely used in packaging, electronic appliances, medical, [0003] Health, construction, automobile and other fields. However, polyester materials based on petrochemicals are typical white polluting polymer materials, which cannot be degraded under natural conditions, and the increasing polyester waste will inevitably bring serious pollution to the environment. Moreover, with the depletion of energy and resources, especially after the oil crisis in the 1970s, people realized the danger of organic chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/85C07C69/92C07C67/31
Inventor 伍国琳马建标庞成才王亦农范云鸽
Owner NANKAI UNIV
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