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Doublet crystallization polypropylene composite material and preparation method thereof

A technology of crystalline polypropylene and composite materials, applied in coatings and other directions, can solve problems such as limited performance improvement range, and achieve the effects of easy popularization and application, high modulus, excellent impact toughness and heat resistance.

Inactive Publication Date: 2018-07-27
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As described in EP0446358 B1, CN01132065.5, 2,2'-methylene-bis(4,6-tert-butylphenoxy)sodium phosphate, EP0622404 A1, CN 201110151367.X bis[2,2'- The synthesis of methyl-bis(4,6-tert-butylphenoxy)phosphate] basic aluminum salt and its long-chain alkyl complex can be used as excellent crystallization control agents for polypropylene, but with the help of the above-mentioned nucleating agent It can only induce unimodal crystallization of polypropylene, and the range of performance improvement is limited

Method used

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  • Doublet crystallization polypropylene composite material and preparation method thereof
  • Doublet crystallization polypropylene composite material and preparation method thereof
  • Doublet crystallization polypropylene composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] The nucleating agent NA-11 in Comparative Example 2 was replaced by 2,2'-methylene-bis(6-tert-butylphenoxy)lithium phosphate, and the polypropylene composite was prepared under the same conditions. The modified polypropylene material was subjected to differential scanning calorimetry (DSC), nitrogen atmosphere, and a cooling rate of 10°C / min. It was measured that the crystallization peak was a double crystallization peak, and the low temperature peak temperature was 117.3°C, and the high temperature crystallization peak 128.3°C, tensile strength 36.7MPa, flexural modulus 1780MPa, notched impact strength 5.2KJ / m 2 , heat distortion temperature 123.3 ℃, 1mm thick transparent plate fog are 15.6%.

Embodiment 2

[0034] The nucleating agent NA-11 in Comparative Example 2 was replaced with 2,2'-methylene-bis(6-tert-butylphenoxy)phosphate sodium salt, and other conditions were unchanged to prepare polypropylene composite materials. The modified polypropylene material was subjected to differential scanning calorimetry (DSC), nitrogen atmosphere, and a cooling rate of 10°C / min. It was measured that the crystallization peak was a double crystallization peak, the low temperature peak temperature was 118.4°C, and the high temperature crystallization peak 129.2°C, tensile strength 39.3MPa, flexural modulus 2080MPa, notched impact strength 5.2KJ / m 2 , heat distortion temperature 127.6 ℃, 1mm thick transparent plate fog are 14.3%.

Embodiment 3

[0036] The nucleating agent NA-11 in Comparative Example 2 was replaced with 2,2'-methylene-bis(6-tert-butylphenoxy)phosphate potassium salt, and other conditions remained unchanged to prepare polypropylene composite materials. The modified polypropylene material was subjected to differential scanning calorimetry (DSC), nitrogen atmosphere, and a cooling rate of 10°C / min. It was measured that the crystallization peak was a double crystallization peak, the low temperature peak temperature was 117.8°C, and the high temperature crystallization peak was 117.8°C. 127.1°C, tensile strength 37.4MPa, flexural modulus 1920MPa, notched impact strength 5.0KJ / m 2 , heat distortion temperature 125.3 ℃, 1mm thick transparent plate fog are 15.3%.

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Abstract

The invention discloses a doublet crystallization polypropylene composite material and a preparation method thereof. The composite material comprises the following components by mass fraction ratio: 80-99.9% of an isotactic polypropylene content, 0.01-10% of an anti-oxidant content, 0.01-20% of an inertia filling material, and 0.01-5% of a crystallization control agent. The above components are subjected to high-speed mixing, a parallel double screw extruder is used for extruded pelletizing to prepare the composite material. The composite material has double crystallization peaks, a crystallization temperature scope is between 105 DEG C and 135 DEG C, the high-temperature crystallization peak is at 120 DEG C and 135 DEG C, and the low-temperature peak is 105 DEG C and 120 DEG C. The composite material has the advantages of high rigidity and high modulus, and has excellent impact toughness resistance and heat resistance.

Description

technical field [0001] The invention belongs to the field of new materials, and relates to a bimodal crystalline polypropylene composite material and a preparation method thereof, in particular to a bimodal crystalline polypropylene material and a method for controlling the bimodal crystallization of the polypropylene material. Background technique [0002] Polypropylene is a crystalline polyolefin plastic with excellent performance and wide application. The crystallization behavior of polypropylene can be improved by adding additives. Phosphorous heterocyclic compounds are a kind of excellent nucleating agents to promote the rapid crystallization of polypropylene. As described in EP0446358 B1, CN01132065.5, 2,2'-methylene-bis(4,6-tert-butylphenoxy)sodium phosphate, EP0622404 A1, CN 201110151367.X bis[2,2'- The synthesis of methyl-bis(4,6-tert-butylphenoxy)phosphate] basic aluminum salt and its long-chain alkyl complex can be used as excellent crystallization control agents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/52B29B7/00B29B9/06B29B9/16B29C37/02
CPCB29B7/002B29B9/06B29B9/16B29C37/02C08K5/52C08L23/12
Inventor 张凯周颖于杰
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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