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Preparation method for low temperature toughness isotatic polypropylene product

A technology of isotactic polypropylene and low-temperature toughness, which is applied in the field of preparation of toughened polypropylene and tactic polypropylene products, can solve the problems of limited effect, insignificant reduction in modulus and tensile strength, etc., and reach the glass transition temperature Low, reduced strength and processing fluidity, good low temperature performance

Active Publication Date: 2013-08-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Zhang, M.L.Liu, Y.Q.Zhang, X.H.Gao, J.M.Huang, F.Song, Z.H.Wei, G.S.And Qiao, J.L.Polymer, 2002, 43, 5133-5138) In addition, it was found that the addition of β-nucleating agent made polypropylene The matrix crystal form changes from α crystal to β crystal, and its impact strength is significantly improved, and the modulus and tensile strength are not significantly reduced.
(Zhu Jingyun, Zhao Heying, Effect of β crystal nucleating agent on crystallization behavior and performance of PP Synthetic Resin and Plastics 2004, 21, 23-27) Although a single addition of ultrafine powder rubber or β nucleating agent is beneficial to polypropylene Increased toughness, but its effect is very limited

Method used

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  • Preparation method for low temperature toughness isotatic polypropylene product
  • Preparation method for low temperature toughness isotatic polypropylene product

Examples

Experimental program
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Effect test

Embodiment 1

[0023] First, premix 100 parts of isotactic polypropylene resin and 5 parts of rare earth β-nucleating agent WBG and then add them to the twin-screw extruder. , 200°C, 200°C, 200°C, 195°C, the same below, omitted) to obtain β-nucleating agent masterbatch by melt blending, extrusion, cooling, and pelletizing; 100 parts of isotactic polypropylene resin, 30 parts of superfine The powder polyethyl acrylate rubber is pre-mixed and added to the twin-screw extruder at a temperature of 150-200°C (the temperature of each zone of the twin-screw extruder is 150°C, 190°C, 200°C, 200°C, 200°C, 195°C , the same below, omitted) under melt blending extrusion, cooling, pelletizing to obtain ultra-fine powder polyethylacrylate rubber masterbatch; 1 part of β-nucleating agent masterbatch, 6.7 parts of ultrafine powder polyethylacrylate rubber Ester rubber masterbatch, 100 parts of isotactic polypropylene resin and 0.1 part of antioxidant 1010 are pre-mixed and then added to the twin-screw extrud...

Embodiment 2

[0025] 100 parts of isotactic polypropylene resin and 5 parts of rare earth β-nucleating agent WBG are pre-mixed and then added to the twin-screw extruder, melted, blended and extruded at a temperature of 150-200 ° C, cooled, and pelletized to obtain β-nucleated Agent masterbatch; premix 100 parts of isotactic polypropylene resin and 30 parts of ultra-fine powdered polyethylacrylate rubber, then add it to a twin-screw extruder, melt blend and extrude at a temperature of 150-200 ° C, cool and cut Get superfine powder polyethyl acrylate rubber masterbatch; 2 parts of β nucleating agent masterbatch, 6.7 parts superfine powder polyethylacrylate rubber, 100 parts isotactic polypropylene resin and 0.1 part antioxidant After 1010 premixing, add it to the twin-screw extruder, melt blending and extruding at a temperature of 150-200 ° C, cool, and pelletize to obtain isotactic polypropylene modified pellets; the prepared isotactic polypropylene modified pellets The materials were inject...

Embodiment 3

[0027] 100 parts of isotactic polypropylene resin and 5 parts of rare earth β-nucleating agent WBG are pre-mixed and then added to the twin-screw extruder, melted, blended and extruded at a temperature of 150-200 ° C, cooled, and pelletized to obtain β-nucleated Agent masterbatch; premix 100 parts of isotactic polypropylene resin and 30 parts of ultra-fine powdered polyethylacrylate rubber, then add it to a twin-screw extruder, melt blend and extrude at a temperature of 150-200 ° C, cool and cut Get superfine powder polyethyl acrylate rubber masterbatch; 5 parts of beta nucleating agent masterbatch, 6.7 parts superfine powder polyethylacrylate rubber masterbatch, 100 parts of isotactic polypropylene resin and 0.1 part of antibacterial Oxygen agent 1010 is pre-mixed and added to a twin-screw extruder, melt-blended and extruded at a temperature of 150-200°C, cooled, and pelletized to obtain isotactic polypropylene modified pellets; the obtained isotactic polypropylene is modified...

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Abstract

The invention discloses a preparation method for a low temperature toughness isotatic polypropylene product. The preparation method comprises the following steps of (1) pre-mixing 100 parts of isotatic polypropylene resin and 5 parts of beta nucleating agent to obtain a mixture and then putting the mixture into a twin-screw extruder, and carrying out melt blending and extruding to obtain beta nucleating agent master batch; (2) pre-mixing 100 parts of isotatic polypropylene resin and 30 parts of superfine powder rubber to obtain a mixture and then putting the mixture into the twin-screw extruder, and carrying out melt blending and extruding to obtain superfine powder rubber master batch; (3) pre-mixing 100 parts of isotatic polypropylene resin, 1-5 parts of beta nucleating agent master batch, 1.7-20 parts of superfine powder rubber master batch and 0.1-0.2 part of antioxygen to obtain a mixture and then putting the mixture into the twin-screw extruder, and carrying out melt blending and extruding to obtain isotatic polypropylene modified granules; and (4) carrying out injection moulding on the isotatic polypropylene modified granules, so as to obtain the low temperature toughness isotatic polypropylene product. According to the method, the technical measures of adding both the beta nucleating agent and the superfine powder rubber are adopted, so that the properties, especially the low temperature impact toughness of the product are greatly improved.

Description

technical field [0001] The invention relates to a method for toughening polypropylene, in particular to a method for preparing a low-temperature tough isotactic polypropylene product, and belongs to the field of polymer materials. Background technique [0002] Polypropylene is a general-purpose polymer material widely used in automobiles, electrical appliances, and daily necessities. It has many advantages, such as its rich source of raw materials, cheap price, light weight, and good processing performance. In addition, its products have excellent comprehensive properties, such as high strength and modulus, good dielectric properties, and good wear resistance. However, the poor toughness of pure polypropylene, especially the poor low-temperature toughness, greatly limits its application, so the present invention seeks an effective method to improve the low-temperature toughness of polypropylene. [0003] In recent decades, improving the toughness of polypropylene has been a...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L33/08C08L9/06C08L9/02C08L13/00C08L83/04C08K5/20B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 傅强朱燕灵耿呈祯王珂张琴
Owner SICHUAN UNIV
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