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PET auxiliary agent, synthetic method thereof and application of PET auxiliary agent in improvement of mechanical properties of recycled PET

A synthesis method and additive technology, applied in the field of polymer materials, can solve the problems of easy embrittlement, insufficient mechanical properties, no high-performance full recovery, etc., and achieve the effect of improving crystallization ability and compatibility

Active Publication Date: 2022-04-08
深圳市那鸿科技有限公司
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Problems solved by technology

However, most of the environmentally friendly compositions currently on the market are produced by adding 30% recycled PET, and there is no high-performance fully recycled part, and most of the resin compositions have problems such as insufficient mechanical properties and easy embrittlement.

Method used

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  • PET auxiliary agent, synthetic method thereof and application of PET auxiliary agent in improvement of mechanical properties of recycled PET
  • PET auxiliary agent, synthetic method thereof and application of PET auxiliary agent in improvement of mechanical properties of recycled PET
  • PET auxiliary agent, synthetic method thereof and application of PET auxiliary agent in improvement of mechanical properties of recycled PET

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Embodiment Construction

[0030] The following will be further described in detail through specific embodiments, but the embodiments of the present invention are not limited thereto. Unless otherwise specified, the technical means used in the following embodiments are conventional means well known to those skilled in the art; the experimental methods used are all conventional methods; the materials, reagents, etc. used can be obtained from commercial sources.

[0031] A PET additive, synthesized by the reaction of 1,3,2,4-dibenzylidene sorbitol and long carbon chain montan ceric acid (light yellow flakes, Woka, Germany) under the catalysis of 4-dimethylaminopyridine, PET The molecular structure of the auxiliary agent is as in formula (I), and the value range of n in formula (I) is 2-3. Montan wax is a waxy substance obtained from lignite by extraction of organic solvents such as benzene and toluene, also known as montan wax. Its main component is long-chain fatty wax acid (being long carbon chain mont...

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Abstract

The invention relates to the field of high polymer materials, and discloses a PET auxiliary agent, a synthesis method thereof and an application of the PET auxiliary agent in improvement of mechanical properties of recycled PET, and the PET auxiliary agent is synthesized by reacting dibenzylidene sorbitol and long-carbon-chain lignite wax acid under catalysis of dimethylaminopyridine. A synthetic method of a PET auxiliary agent comprises the following steps: step I, dispersing dibenzylidene sorbitol in xylene, adding long-carbon-chain montan wax acid and dimethylaminopyridine, and carrying out a reaction; and II, after the reaction is finished, carrying out suction filtration, washing and drying to obtain the target PET auxiliary agent. The PET auxiliary agent can be used as a mechanical property accelerant for recovering PET, and the straight-chain molecular structure of the long carbon chain part can promote the addition and rearrangement of the molecular chain in the crystallization process of the recovered PET and the epiphytic crystallization around the long carbon chain, so that the crystallization promoting effect of the dibenzylidene sorbitol part is further enhanced; the recycled PET is induced to generate microcrystals or shish-kebab, so that the mechanical property of the recycled PET is improved.

Description

technical field [0001] The invention relates to the field of macromolecular materials, in particular to a PET additive, a synthesis method thereof and an application thereof in increasing the mechanical properties of recycled PET. Background technique [0002] Polyethylene terephthalate, referred to as PET, is a crystalline saturated polyester, a milky white or light yellow, highly crystalline polymer. It has excellent physical and mechanical properties in a wide temperature range, excellent electrical insulation, even at high temperature and high frequency, its electrical properties are still good, but its corona resistance is poor, creep resistance, fatigue resistance , good friction resistance and dimensional stability. With the widespread application of PET, the environmental pollution caused by discarded disposable PET packaging bottles has become increasingly serious, which has attracted worldwide attention. How to achieve sustainable development has become a worldwid...

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Application Information

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IPC IPC(8): C07D519/00C08K5/1575C08L67/02
CPCY02W30/62
Inventor 吕芳晓张盛华郭玉茹
Owner 深圳市那鸿科技有限公司
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