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Blended ultrahigh molecular weight polypropylene/polypropylene alloy and preparation method thereof

An ultra-high molecular weight, polypropylene technology, applied in the field of polymer materials, can solve the problems of difficult control of molding processing, cross-linking after molecular chain breaking, etc., and achieve the effect of excellent processing performance, low cost and simple method

Inactive Publication Date: 2020-05-08
山东清河化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of improving the melt strength of polypropylene by reactive extrusion, crosslinking after chain breakage of polypropylene molecular chains often occurs, which makes the subsequent molding process of polypropylene difficult to control

Method used

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  • Blended ultrahigh molecular weight polypropylene/polypropylene alloy and preparation method thereof
  • Blended ultrahigh molecular weight polypropylene/polypropylene alloy and preparation method thereof
  • Blended ultrahigh molecular weight polypropylene/polypropylene alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] S1: An antioxidant compounded with 100 parts of isotactic polypropylene (melt mass flow rate 0.5-6g / 10min), 1 part of ultra-high molecular weight polypropylene, 0.5 part of 1010 type antioxidant and 0.375 part of 168 type antioxidant Add 0.25 parts of zinc stearate and 0.5 parts of liquid paraffin into a high-speed mixer and stir evenly. Adjust the speed of the high-speed mixer to 800-1200r / min, the mixing temperature to 60-80°C, and the mixing time to 10-20min. get the premix;

[0025] S2: The premix is ​​melted, kneaded, homogenized, extruded, and granulated through the screw extruder. The length-to-diameter ratio of the screw extruder is 36:1-50:1, and the temperature in the first zone is set to 120 ~140°C, the temperature from the second zone to the fourth zone is 160~200°C, the temperature from the fifth zone to the eighth zone is 210~230°C, the speed of the screw extruder is 200~350r / min, and the obtained The product is a blended ultra-high molecular weight polyp...

Embodiment 2

[0027] S1: An antioxidant compounded with 100 parts of isotactic polypropylene (melt mass flow rate 6-15g / 10min), 3 parts of ultra-high molecular weight polypropylene, 0.5 part of 1010 type antioxidant and 0.375 part of 168 type antioxidant Add 0.5 parts of zinc stearate and 0.5 parts of liquid paraffin into a high-speed mixer and stir evenly. Adjust the speed of the high-speed mixer to 800-1200r / min, the mixing temperature to 60-80°C, and the mixing time to 10-20min. get the premix;

[0028] S2: The premix is ​​melted, kneaded, homogenized, extruded, and granulated through the screw extruder. The length-to-diameter ratio of the screw extruder is 36:1-50:1, and the temperature in the first zone is set to 120 ~140°C, the temperature from the second zone to the fourth zone is 160~200°C, the temperature from the fifth zone to the eighth zone is 210~230°C, the speed of the screw extruder is 200~350r / min, and the obtained The product is a blended ultra-high molecular weight polypr...

Embodiment 3

[0030] S1: An antioxidant compounded with 100 parts of isotactic polypropylene (melt mass flow rate 15-30g / 10min), 5 parts of ultra-high molecular weight polypropylene, 0.5 part of 1010 type antioxidant and 0.375 part of 168 type antioxidant Add 0.75 parts of zinc stearate and 1 part of liquid paraffin into a high-speed mixer and stir evenly. Adjust the speed of the high-speed mixer to 800-1200r / min, the mixing temperature to 60-80°C, and the mixing time to 10-20min. get the premix;

[0031] S2: The premix is ​​melted, kneaded, homogenized, extruded, and granulated through the screw extruder. The length-to-diameter ratio of the screw extruder is 36:1-50:1, and the temperature in the first zone is set to 120 ~140°C, the temperature from the second zone to the fourth zone is 160~200°C, the temperature from the fifth zone to the eighth zone is 210~230°C, the speed of the screw extruder is 200~350r / min, and the obtained The product is a blended ultra-high molecular weight polypro...

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Abstract

The invention relates to the field of polymer materials, and concretely relates to a blended ultrahigh molecular weight polypropylene / polypropylene alloy and a preparation method thereof. The principle of similar compatibility is used, ultrahigh molecular weight polypropylene and polypropylene have similar molecular chain segments, and the common polypropylene has excellent processability, so a small amount of the ultrahigh molecular weight polypropylene and polypropylene are subjected to melt blending extrusion to prepare the ultrahigh molecular weight polypropylene / polypropylene alloy, thereby the crosslinking problem generated in the production of high-melt-strength polypropylene by a reactive extrusion method is avoided, and the melt strength of the polypropylene material is enhancedto a certain extent. The method is simple and low in cost, the polypropylene melt strength is remarkably improved, and the prepared alloy is excellent in processability.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a blended ultra-high molecular weight polypropylene / polypropylene alloy and a preparation method thereof. Background technique [0002] In recent years, the melt strength of polymers has gradually become an important parameter to measure the performance of polymers. For example, in many fields such as blown film, foaming, and melt spinning, due to the low melt strength of polymers, it is easy to cause difficulty in product molding and unstable performance. Therefore, improving the melt strength of polymers has become one of the effective ways to expand the above-mentioned processing fields. At present, the methods to improve the melt strength of polymers mainly include polymerization method, radiation method, reaction extrusion method, etc. However, due to the high requirements of process conditions and expensive equipment, the polymerization method and radiation method are not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L91/06C08K5/134C08K5/526C08K5/098
CPCC08L23/12C08L2205/025C08L2205/03C08L91/06C08K5/1345C08K5/526C08K5/098
Inventor 谭洪生刘常衡盖群歧沈鹏辉张国强邢本政于英杰曲鹏跃
Owner 山东清河化工科技有限公司
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