Polypropylene/liquid crystal polymer composite material with high β crystal content and preparation method

A liquid crystal polymer and composite material technology, applied in the field of polypropylene toughening and modification, can solve problems such as low β nucleation efficiency, and achieve the effects of good compatibility, excellent elongation at break, and high impact strength

Active Publication Date: 2019-03-22
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with organic small molecule nucleating agents, its β-nucleation efficiency is still relatively low

Method used

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  • Polypropylene/liquid crystal polymer composite material with high β crystal content and preparation method
  • Polypropylene/liquid crystal polymer composite material with high β crystal content and preparation method
  • Polypropylene/liquid crystal polymer composite material with high β crystal content and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add biphenyldioxanol and phenylsuccinic acid with a molar ratio of 1:1 into a three-necked flask, add 2‰ zinc acetate and 3‰ antimony trioxide as catalysts, heat and stir the mixture, and control the reaction temperature to 180°C and blowing nitrogen, the reaction time is 3h. After the reaction, turn off the nitrogen, start vacuuming, control the reaction temperature to rise to 200°C, the vacuum degree is less than 60Pa, the reaction time is 3.5h, and finally cool to obtain the liquid crystal polymer β nucleating agent LCP-NA (polymerization degree 90, molecular weight 50000 ).

[0042] The formula is: 400g of isotactic polypropylene (Sinopec PPH-T03, MFR=3.0g / 10min), 0.4g of liquid crystal polymer beta nucleating agent (LCP-NA), 0.4g of antioxidant 1010 (BASF, Germany).

[0043] Dry iPP and LCP-NA in a vacuum oven for 8 hours for later use. Select the appropriate screw temperature, rotation speed and aspect ratio, melt and blend the dry isotactic polypropylene, β-nuc...

Embodiment 2

[0045]Add biphenyldioxanol and phenylsuccinic acid with a molar ratio of 1:1 into a three-necked flask, add 2‰ zinc acetate and 3‰ antimony trioxide as catalysts, heat and stir the mixture, and control the reaction temperature to 180°C and blowing nitrogen, the reaction time is 3h. After the reaction, turn off the nitrogen, start vacuuming, control the reaction temperature to rise to 200°C, the vacuum degree is less than 60Pa, the reaction time is 3.5h, and finally cool to obtain the liquid crystal polymer β nucleating agent LCP-NA (polymerization degree 90, molecular weight 50000 ).

[0046] The formula is: 400g of isotactic polypropylene (Sinopec PPH-T03, MFR=3.0g / 10min), 8g of liquid crystal polymer beta nucleating agent (LCP-NA), 1.0g of antioxidant 1010 (BASF, Germany).

[0047] Dry iPP and LCP-NA in a vacuum oven for 8 hours for later use. Select the appropriate screw temperature, rotation speed and aspect ratio, melt and blend the dry isotactic polypropylene, β-nuclea...

Embodiment 3

[0049] Add biphenyldioxanol and phenylsuccinic acid with a molar ratio of 1:1 into a three-necked flask, add 2‰ zinc acetate and 3‰ antimony trioxide as catalysts, heat and stir the mixture, and control the reaction temperature to 180°C and blowing nitrogen, the reaction time is 3h. After the reaction, turn off the nitrogen, start vacuuming, control the reaction temperature to rise to 200°C, the vacuum degree is less than 60Pa, the reaction time is 3.5h, and finally cool to obtain the liquid crystal polymer β nucleating agent LCP-NA (polymerization degree 90, molecular weight 50000 ).

[0050] The formula is: 400g of isotactic polypropylene (Sinopec PPH-T03, MFR=3.0g / 10min), 16g of liquid crystal polymer beta nucleating agent (LCP-NA), 1.2g of antioxidant 1010 (BASF, Germany).

[0051] Dry iPP and LCP-NA in a vacuum oven for 8 hours for later use. Select the appropriate screw temperature, rotation speed and aspect ratio, melt and blend the dry isotactic polypropylene, β-nucl...

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Abstract

The invention discloses a PP (polypropylene) / liquid crystal polymer composite with high beta-form crystal content and a preparation method and belongs to the field of toughening modification of PP. Isotactic PP, a liquid crystal polymer nucleating agent and a functional aid are uniformly mixed in a high-speed mixer and subjected to melt extrusion pelletizing in a twin-screw extruder, and the PP composite with high beta-form crystal content is obtained. The relative content of beta-form crystals in the prepared PP composite is 90% or higher, and compared with pure PP, the prepared PP composite has higher impact strength, higher elongation at break and better heat resistance.

Description

technical field [0001] The invention relates to a polypropylene / liquid crystal polymer composite material with high beta crystal content and a preparation method thereof, and also relates to a liquid crystal polymer polypropylene beta nucleating agent and a preparation method, belonging to the field of polypropylene toughening modification. Background technique [0002] Polypropylene (PP) is one of the five general-purpose plastics, and is widely used in household appliances, automobile industry, packaging materials, electronic products, building materials and other industries. Polypropylene has good mechanical properties and processing properties, but it still has disadvantages such as poor aging resistance, poor low-temperature ductility, high-speed tensile brittleness, and poor dimensional stability of injection molded products, which limit its application. Isotactic polypropylene (iPP) is a semi-crystalline polymer that can form four crystal structures under certain cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L67/02C08K5/134C08G63/672C08G63/86B29C48/92
CPCB29C48/92B29C2948/92704C08G63/672C08G63/866C08L23/12C08L2201/08C08L2205/12C08L2205/24C08L67/02C08K5/1345
Inventor 杨荣丁律李锦春张鑫
Owner CHANGZHOU UNIV
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