Method for analyzing content of scorch retarder CTP (N-cyclohexylthiophthalimide) in vulcanized rubber

A technology of vulcanized rubber and analysis method, which is applied in the field of rubber industry, can solve problems such as the blank of quantitative analysis method, and achieve the effect of eliminating influence

Active Publication Date: 2014-02-26
BEIJING RED AVENUE INNOVA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the quantitative an

Method used

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  • Method for analyzing content of scorch retarder CTP (N-cyclohexylthiophthalimide) in vulcanized rubber
  • Method for analyzing content of scorch retarder CTP (N-cyclohexylthiophthalimide) in vulcanized rubber
  • Method for analyzing content of scorch retarder CTP (N-cyclohexylthiophthalimide) in vulcanized rubber

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Experimental program
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Embodiment 1

[0030] Embodiment 1 vulcanized rubber sample preparation

[0031] The basic formula is (parts by mass):

[0032] Component 1: Natural Rubber NR30, Butadiene Rubber BR70; Carbon Black N37580, Process Oil 4.0, Stearic Acid 2.0, Zinc Oxide 2.0:;

[0033] Component 2: tackifying resin SL1801 4.0, antioxidant 4020 1.6, antioxidant RD1.5:;

[0034] Component 3: sulfur 1.0, vulcanization accelerator NS2.2, anti-scorch agent CTP (change the amount, add 0.1 to sample I; add 0.3 to sample II; add 1.0 to sample III).

[0035] Preparation process: In a 1.6-liter Banbury internal mixer (manufactured by FARREL), add component 1, gradually raise the temperature to 160°C and mix for 6 minutes to obtain a section of mixed rubber, which is left at room temperature for 16 hours; then continue to banbury internal mixing In the machine, mix the mixed rubber and component 2 at 145°C for 5 minutes to obtain the masterbatch, and cool the masterbatch to below 90°C; then use the XK-160 open rubber mi...

Embodiment 2

[0036] Embodiment 2: the consumption analysis of retarder in vulcanized rubber sample 1

[0037] 2.1, Preparation of standard series solutions: Weigh 100.081mg of phthalimide into a 50ml volumetric flask, dilute to volume with chloroform, prepare mother liquor A, weigh 616.8mg of dodecyl nitrile into a 100ml volumetric flask, and use Chloroform was fixed to volume, and mother liquor B was prepared. Quantitatively take 3ml of mother solution B with a pipette and transfer them into six 10ml volumetric flasks in sequence, then quantitatively take 250ul, 450ul, 900ul, 1400ul, 1850ul, and 2300ul of mother solution A with a pipette and transfer them into the above six 10ml volumetric flasks in sequence Finally, six 10ml volumetric flasks were distilled to volume with chloroform to obtain six standard series solutions containing internal standards (standard 1, standard 2, standard 3, standard 4, standard 5, and standard 6). The mass ratios of dicarboximide to internal standard dodec...

Embodiment 3

[0051] Example 3: Analysis of the amount of anti-scorch agent CTP in the laboratory self-made vulcanizate sample II

[0052] 3.1, Preparation of standard series solutions: Weigh 100.081mg of phthalimide into a 50ml volumetric flask, dilute to volume with chloroform, prepare mother liquor A, weigh 616.8mg of dodecyl nitrile into a 100ml volumetric flask, and use Chloroform was fixed to volume, and mother liquor B was prepared. Quantitatively take 3ml of mother solution B with a pipette and transfer them into six 10ml volumetric flasks in turn, and then quantitatively take 250ul, 450ul, 900ul, 1400ul, 1850ul, 2300ul of mother solution A with a pipette and transfer them into the above six 10ml volumetric flasks in sequence Finally, six 10ml volumetric flasks were distilled to volume with chloroform to obtain six standard series solutions (mark 1, mark 2, mark 3, mark 4, mark 5, mark 6). The mass ratios of amine to internal standard dodecylnitrile were 0.027, 0.049, 0.097, 0.151,...

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Abstract

The invention relates to an infrared spectroscopic analysis method for analyzing the dosage of a scorch retarder CTP (N-cyclohexylthiophthalimide) in a formula of vulcanized rubber. In the method, the content of phthalimide in the vulcanized rubber is calculated by use of the mutual relation between an internal standard substance and the characteristic infrared absorption spectrum peak-mass ratio of phthalimide so as to obtain the content of the scorch retarder CTP in the vulcanized rubber. The method provided by the invention is simple to operate, and the analysis result has high accuracy rate and little error.

Description

technical field [0001] The invention belongs to the field of rubber industry, and in particular relates to a method for analyzing the content of antiscorch agent N-cyclohexylthiophthalimide (CTP) in vulcanized rubber. Background technique [0002] The early vulcanization phenomenon of rubber compound due to heat during storage and processing is called scorching. Scorching will cause the rubber compound to lose its fluidity and reprocessing ability, and affect the production process of tire rubber products. At present, the main solution to this problem is The easiest way is to use anti-scorch agent. The anti-scorch agent CTP full name is N-cyclohexylthiophthalimide, which has the function of delaying the vulcanization time. CTP first decomposes itself to form sulfur-containing free radicals and phthalimides, and the sulfur-containing free radicals combine with accelerators, thereby delaying the function of accelerators and preventing premature crosslinking of rubber; The im...

Claims

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Application Information

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IPC IPC(8): G01N21/3563
Inventor 阮振刚高剑琴陈强刘慧娜王璨董栋
Owner BEIJING RED AVENUE INNOVA
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