Unlock instant, AI-driven research and patent intelligence for your innovation.

MAH (maleic anhydride) grafted polyolefin compatilizer preparation method based on extensional rheological technology

A technology of grafted polyolefin and extensional rheology, which is applied in the field of preparation of maleic anhydride grafted polyolefin compatibilizer based on extensional rheology technology, can solve the problem that styrene has limited effect on inhibiting degradation and does not work well Solve the problems of limited inhibitory effect and other problems, and achieve the effects of easy control of melt fluidity, narrow residence time distribution, and simple and easy preparation process

Inactive Publication Date: 2018-08-24
SIIICO TECH CO LTD
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this system also has certain limitations. For example, in the PP system, the MAH content is fixed at 5phr at 190°C. When the initiator content is low (≤0.3phr), the effect of styrene on inhibiting degradation is limited. When the initiator content is high ( ≥0.5phr), the addition of styrene increases the degradation. For example, the main side reaction of the PE system PE / DCP / MAH / St system is the crosslinking of polyethylene, and styrene has a limited inhibitory effect on polyethylene crosslinking.
[0005] Therefore, how to obtain a product with a high grafting rate while inhibiting the degradation or crossover of polyolefins due to the limitation of the structure of the reaction processing equipment twin-screw extruder when the MAH system is melt-grafted on the polyolefin under the trigger of peroxide side reactions, and to ensure that the properties of polyolefins will not change too much. These key issues have not been well resolved so far.

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
  • MAH (maleic anhydride) grafted polyolefin compatilizer preparation method based on extensional rheological technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take the following materials in parts by weight: 100 parts of polypropylene, add 1 part of MAH, 2 parts of styrene, 0.3 part of DCP, 0.2 part of antioxidant, 0.5 part of lubricant, and add them to the mixer for pre-mixing, stirring, and mixing temperature The temperature is 30°C, the speed of the mixer is 500 rpm, and the mixing time is 5 minutes;

[0041]Put the pre-mixed materials into the elongational rheological plastic extrusion equipment for extrusion granulation. During extrusion, the processing temperature of each section of the elongational rheological plastic extrusion equipment is respectively set at 165°C for the first section and 195°C for the second section. ℃, the third section is 200°C, the fourth section is 200°C, the fifth section is 190°C, the die temperature is 180°C, the length-to-diameter ratio of the rotor is 22, the rotor speed is 60 rpm, and the feeder speed is 30 rpm , the strips were watered and cut into pieces.

[0042] The performance of th...

Embodiment 2

[0044] Take the following materials in parts by weight: 100 parts of polypropylene, add 1.5 parts of MAH, 2 parts of styrene, 0.4 part of DCP, 0.2 part of antioxidant, 0.5 part of lubricant, add to the mixer in turn for pre-mixing, stirring, mixing temperature The temperature is 30°C, the speed of the mixer is 500 rpm, and the mixing time is 5 minutes;

[0045] Put the pre-mixed materials into the elongational rheological plastic extrusion equipment for extrusion granulation. During extrusion, the processing temperature of each section of the elongational rheological plastic extrusion equipment is respectively set at 165°C for the first section and 195°C for the second section. ℃, the third section is 200°C, the fourth section is 200°C, the fifth section is 190°C, the die temperature is 180°C, the length-to-diameter ratio of the rotor is 22, the rotor speed is 90 rpm, and the feeder speed is 45 rpm , the strips were watered and cut into pieces.

[0046] The performance of the...

Embodiment 3

[0048] Take the following materials in parts by weight: 100 parts of polypropylene, add 2 parts of MAH, 2 parts of styrene, 0.5 part of DCP, 0.2 part of antioxidant, 0.5 part of lubricant, add to the mixer in turn for pre-mixing, stirring, mixing temperature The temperature is 30°C, the speed of the mixer is 500 rpm, and the mixing time is 5 minutes;

[0049] Put the pre-mixed materials into the elongational rheological plastic extrusion equipment for extrusion granulation. During extrusion, the processing temperature of each section of the elongational rheological plastic extrusion equipment is respectively set at 165°C for the first section and 195°C for the second section. ℃, the third section is 200°C, the fourth section is 200°C, the fifth section is 190°C, the die temperature is 180°C, the length-to-diameter ratio of the rotor is 22, the rotor speed is 120 rpm, and the feeder speed is 60 rpm , the strips were watered and cut into pieces.

[0050] The performance of the ...

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 an MAH (maleic anhydride) grafted polyolefin compatilizer preparation method based on an extensional rheological technology. The method comprises the steps as follows: (1) premixing: polyolefin, an initiator, MAH, second monomer polystyrene, an antioxidant, a lubricant and the like are added to a high-speed mixer to be premixed; (2) a grafting reaction: the premixed material is added to extensional rheological plasticizing extrusion equipment, and MAH monomers are grafted to molecular chains of polyolefin resin through a melt free radical grafting reaction. When the method is used for preparing the MAH grafted polyolefin compatilizer, the addition proportion of the initiator and other aids can be reduced significantly, and side reactions such as crosslinking in thePE grafting process and degradation in the PP grafting process can be inhibited. The compatilizer prepared with the technology has the active component content far higher than that of products prepared with a twin-screw extruder, residual low-molecular products are reduced to the lowest level, and the rigor requirement of the current polymer material processing industry for VOC is met.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a preparation method of a maleic anhydride grafted polyolefin compatibilizer based on extensional rheology technology. The processing equipment of the polymer material of the present invention is the latest invention patent of Professor Qu Jinping of the National Engineering Research Center of New Polymer Molding Equipment of South China University of Technology - the method and equipment of plasticizing and transporting polymer materials based on elongational rheology (patent number CN100496927C) . Compared with traditional screw plasticizing equipment, it has the characteristics of low energy consumption, weak shearing, strong conveying capacity, and uniform mixing and dispersion. Background technique [0002] Polyolefin materials have many advantages such as abundant raw material sources, low price, convenient processing and molding, and good comprehensive perform...

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
IPC IPC(8): C08F255/02C08F212/08C08F222/06B29B9/06
CPCC08F255/02B29B9/06C08F212/08C08F222/06
Inventor 张伟明
Owner SIIICO TECH CO LTD