High melt strength polypropylene and preparation method thereof

A high-melt-strength polypropylene technology, applied in the field of high-melt-strength polypropylene and its preparation, can solve the problems of polypropylene main chain degradation, initiator dispersion, residual grafting efficiency, etc., to achieve enhanced interface bonding, energy The effect of low consumption, simple process and easy operation

Active Publication Date: 2015-09-09
TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problems of polypropylene main chain degradation, initiator dispersion, residue and low grafting efficiency in the preparation of high-melt-strength polypropylene by post-reactor method, and provides a high-melt-strength polypropylene and a preparation method thereof

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High melt strength polypropylene and preparation method thereof
  • High melt strength polypropylene and preparation method thereof
  • High melt strength polypropylene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0064] Specific embodiment 1: The high melt strength polypropylene of this embodiment is made of polypropylene powder, pre-irradiated rubber latex, pre-irradiated polypropylene powder, water-soluble monomer and heat stabilizer by wet reaction and melt blending. to make;

[0065] The mass ratio of the polypropylene powder to the pre-irradiated polypropylene powder is 100: (1-20); the mass ratio of the polypropylene powder to the pre-irradiated rubber latex is 100: (5-20), The mass ratio of the polypropylene powder to the water-soluble monomer is 100: (0.5-10), and the mass ratio of the polypropylene powder to the heat stabilizer is 100: (0.01-1).

specific Embodiment approach 2

[0066] Second embodiment: This embodiment is different from the first embodiment in that the pre-irradiated polypropylene powder is the polypropylene powder is sealed into a PE bag and subjected to electron beam treatment, wherein the electron beam treatment parameters are: The radiation dose rate is 10kGy / h~10 2 kGy / h, the irradiation time is 0.001h~1h, and the irradiation dose is 0.1kGy~10kGy;

[0067] The pre-irradiated rubber latex liquid is to seal the latex liquid in a PE bottle and perform 60 Coγ-ray (3.7×10 15 Bq) Irradiation treatment; the irradiation parameters are: the irradiation dose rate is 10 2 kGy / h~10 3 kGy / h, the irradiation time is 0.05h-2h, and the irradiation dose is 50kGy-200kGy. The rubber latex is polybutadiene rubber latex, styrene butadiene rubber latex, carboxyl styrene butadiene rubber latex, butyl Nitrile rubber latex, carboxylated nitrile rubber latex, silicone rubber latex or acrylic rubber latex. Others are the same as the first embodiment.

specific Embodiment approach 3

[0068] Specific embodiment three: this embodiment is different from specific embodiment one or two in one of the water-soluble monomers sodium acrylate, acrylamide, sodium styrene sulfonate and NN-methylene bisacrylamide Or a mixture of several. Others are the same as the first or second embodiment.

[0069] When the water-soluble monomers described in this embodiment are a mixture, the respective components have an arbitrary ratio.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses high melt strength polypropylene and a preparation method thereof, and relates to polypropylene and a preparation method thereof. The invention solves the problems of degradation of a polypropylene main chain, dispersion of an initiator, residue, low grafting efficiency and the like when the high melt strength polypropylene is prepared by adopting a post reactor method. The high melt strength polypropylene is prepared from polypropylene powder, pre-irradiated rubber latex, pre-irradiated polypropylene powder, water-soluble monomer and a heat stabilizer by adopting wet reaction and melt-blending. The method comprises: preparation of the pre-irradiated polypropylene powder; preparation of the pre-irradiated rubber latex; and mixing of the pre-irradiated polypropylene powder, the pre-irradiated rubber latex, the polypropylene powder, the water-soluble monomer and the heat stabilizer, and extruding granulation. The method can inhibit aggregation of latex particles, reduce the dispersion scale and improve the dispersion under the shear action in the process of 'mixing dispersion-dewatering drying-reaction'; and the grafting reaction is completed before the polypropylene is melted, so that discontinuous degradation of the polypropylene is avoided. The invention belongs to the field of preparation of modified polypropylene.

Description

Technical field [0001] The invention relates to a high melt strength polypropylene and a preparation method thereof. Background technique [0002] Polypropylene is the most important general-purpose plastic. However, the semi-crystalline conventional linear isotactic polypropylene (iPP) has relatively narrow molecular weight distribution, low melt strength, difficult thermoforming processing, and limited application fields. Improving the melt strength of general-purpose polypropylene has always been a research hotspot in this field, and it is also a technical bottleneck for the expansion and high performance of polypropylene applications. [0003] Long chain branching is the most effective way to improve the melt strength of polypropylene. It can be achieved by the reactor method and the post-reactor method. The reactor method now includes one-step method, two-step method, copolymerization method and in-situ polymerization method. Foreign patented technology is represented by C...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08F291/18C08F255/02C08F279/02C08F220/06C08F220/56C08F212/14C08K5/134B29B9/06
Inventor 刘宇光张学全田波董伟侯静
Owner TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap