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Qualitative and quantitative analysis method for bisphenol antioxidants in plastics

A quantitative analysis, antioxidant technology, applied in the direction of material separation, analysis materials, measuring devices, etc., can solve the problems of substrate interference and complex pretreatment, and achieve the effect of small substrate interference, simple processing process, fast and convenient method

Active Publication Date: 2021-01-22
SHANXI CHEM RES INST
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  • Application Information

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Problems solved by technology

[0007] In order to solve the technical problems existing in the prior art, the present invention provides a qualitative and quantitative analysis method for hindered phenolic bisphenol antioxidants in plastics that is fast, efficient, convenient, and uses less organic solvents to solve the problems of the prior art. The problem of complex pre-treatment and serious substrate interference, and at the same time, provide an analysis idea for the quantitative detection of additives in polymer materials

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  • Qualitative and quantitative analysis method for bisphenol antioxidants in plastics
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  • Qualitative and quantitative analysis method for bisphenol antioxidants in plastics

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Embodiment Construction

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] Taking polycarbonate resin as an example, the present invention is described in more detail.

[0033] 1. Preparation of adsorbent:

[0034] 1. Dissolve 1.0mL 4-vinylpyridine and 8mL ethylene glycol dimethacrylate in 20mL n-propanol / 1,4-dibutanol (3:2, V / V) mixed solution, mix well Then 10 mg of azobisisobutyronitrile was added. After ultrasonic dispersion for 20 minutes, nitrogen was passed through to deoxygenate for 10 minutes, poured into the reactor, and reacted in airtight conditions at 70°C for 12 hours.

[0035] 2. After the polymerization reaction ...

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Abstract

The invention discloses a qualitative and quantitative analysis method for bisphenol antioxidants in plastics, which comprises the following steps of: dissolving plastics in tetrahydrofuran, adding anadsorbent, and enriching bisphenol antioxidants (such as 2, 2'-methylene bis (4-methyl-6-tert-butylphenol), 2, 2'-methylene bis (4, 6-di-tert-butylphenol), desorbing with methanol, and filtering forhigh performance liquid chromatography. The method has the main advantages that (1) the sample pretreatment process is simple, and a sample only needs to be cut into pieces by scissors; (2) an efficient enrichment method is developed by preparing a specific adsorbent, the method is rapid and convenient, the substrate interference is small, and batch test is easy to realize; (3) less organic solvent is used in the enrichment process, and the desorption process can be completed in only 0.5 h; and (4) qualitative and quantitative analysis of the bisphenol antioxidants can be realized at normal temperature.

Description

technical field [0001] The invention relates to a method for enriching and detecting additives in high molecular polymers, in particular to a qualitative and quantitative analysis method for bisphenol antioxidants in plastics. Background technique [0002] Plastic refers to a polymer compound polymerized by polycondensation or polyaddition. It is light in weight, stable in chemical properties, corrosion-resistant, easy to form, and low in processing cost. It is widely used in electronics, electrical appliances, automobiles, construction, packaging, and medical treatment. Equipment, daily necessities and food. [0003] However, most plastics have poor temperature resistance and are prone to aging. For example, polycarbonate resin (PC) is a biodegradable material with excellent comprehensive performance, outstanding impact resistance, transparency and dimensional stability, and a wide range of operating temperatures. Wide, excellent mechanical strength and electrical insulati...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/08G01N30/74
CPCG01N30/08G01N30/74
Inventor 林福华张咪张惠芳代燕琴王克智李训刚张鸿宇王晶唐钰刘凤玉王冉杨树竹李少阳王晨吕伯璋毛晨曦张建军李向阳
Owner SHANXI CHEM RES INST
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