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Quality detection method for special propylene material

A quality inspection method, polypropylene technology, applied in material separation, analysis materials, measuring devices, etc., can solve the problems of complex quantitative analysis, inaccurate qualitative analysis, and difficult industrial application.

Active Publication Date: 2017-07-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a quality detection method for polypropylene special materials to overcome the defects of inaccurate qualitative analysis of polypropylene special materials, complicated quantitative analysis and difficulty in industrial application in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The polypropylene base material, peroxide degradation agent, and compound inhibitor package are uniformly mixed according to the weight of 100:0.8:1.6, and extruded and pelletized in a twin-screw extruder at 160°C, where the polypropylene base powder is melted The rate is 5g / 10min, the isotactic index is 96%, the peroxide degrading agent is 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (DHBP), and the load is at 230℃ The melt flow rate MFR1 of the polypropylene product obtained at 5kg is 180g / 10min, and the MFR2 is 50g / 10min at 230°C load of 2.16kg. The available distribution index n is 1.33. At the same time, headspace chromatography was used for polypropylene product pellets, sampling at 150°C for 4 hours, and the measured volatile content in the product was about 150 ppm. There is no abnormal smell during processing and spinning, and the product performance is stable. Among them, the compound inhibitor is composed of hindered phenolic antioxidant 2,6-di(octadecyl)-4-m...

Embodiment 2

[0037] The polypropylene base material, peroxide degradation agent, and compound inhibitor package are uniformly mixed according to the weight of 100:0.5:2.0, and extruded and pelletized in a twin-screw extruder at 240°C. The melt flow rate of the polypropylene base powder is 10g / 10min, isotactic index 96.5%, peroxide degradation agent is 3,6,9-triethyl-3,6,9-trimethyl-1,4,7-triperoxynonane (TPO ), the melt flow rate MFR1 of the polypropylene product obtained when the load is 5kg at 230℃ is 185g / 10min, and the MFR2 is 51.2g / 10min when the load at 230℃ is 2.16kg. The available distribution index n is 1.32. At the same time, headspace chromatography was used for polypropylene product pellets, sampling at 150°C for 4 hours, and the measured volatile content in the product was about 123ppm. During the spinning process, there was no abnormal smell and the product performance was stable. Among them, the composite inhibitor is a mixture of styrenated phenol / phosphite A / antistatic age...

Embodiment 3

[0039] The polypropylene base material, peroxide degradation agent, and compound inhibitor package are uniformly mixed by weight at 100:1:1, and extruded and pelletized in a twin-screw extruder at 200°C. The melt flow rate of the polypropylene base powder is 2g / 10min, isotactic index 98.0%, peroxide degradation agent is 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (DHBP), load is 5kg at 230℃ When the obtained polypropylene product melt flow rate MFR1 is 135g / 10min, when 230℃ load is 2.16kg, MFR2 is 35g / 10min. The available distribution index n is 1.37. At the same time, headspace chromatography was used for polypropylene product pellets, sampling at 150°C for 4 hours, and the measured volatile content in the product was about 162ppm. During the spinning process, there was no abnormal smell and the product performance was stable. Among them, the compound inhibitor is composed of 2,2'-methylenebis(4-ethyl-6-tert-butylphenol) / 2,2'-ethylenebis(4,6-di-tert-butylphenyl) ) Fluorinate...

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Abstract

The invention discloses a quality detection method for special propylene material, comprising the specific steps of (1) measuring melt-mass flow rate MFR1 when the special propylene material has a load of 5 kg; (2) measuring melt-mass flow rate MFR2 when the special propylene material has a load of 2.16 kg; and (3) calculating distribution index n, i.e., lg MFR1 / LG MFR2, wherein the special propylene material is prepared by using the controllable rheological method. The quality detection method for the special propylene material has the advantages of good simplicity and high speed; a quantitative analytical method is provided for detecting the odor of the special propylene material prepared by using the controllable rheological method, and the method is applicable to the quality control in industrial amplified production.

Description

Technical field [0001] The invention relates to a quality detection method for polypropylene special materials, in particular to a quality detection method for preparing polypropylene special materials by a controllable rheological method. Background technique [0002] High melt flow rate polypropylene has a wide range of applications in industries such as non-woven fabrics, carpets, artificial turf, and decorative fabrics. There are two main production methods for high melt flow rate polypropylene: hydrogen modulation method and controllable rheology method. Hydrogen-modified products can effectively reduce the odor of the product, but when producing polypropylene with high melt flow rate, the amount of hydrogen added is limited by the reactor, which is difficult to operate, and the molecular weight distribution of polypropylene produced by the hydrogen-modulated method is relatively low. It is not conducive to the processing and application of fiber materials. The polypropyle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/02C08K5/14C08K5/13C08K5/526C08K5/098C08K5/103C08K5/25C08K5/524C08K3/26G01N30/02
Inventor 黄强王艳芳陈商涛张凤波陈兴锋李思博张友军姜凯何勇胡于中石行波黄伟欢
Owner PETROCHINA CO LTD
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