Polyolefin material melted extrusion functionalization stress induction method

A melt extrusion, polyolefin technology, applied in the field of modification of polymer materials, can solve the problems of low power of ultrasonic transducers, difficult to industrialize modification, difficult to enlarge, etc., achieve cross-linking side reaction inhibition, homopolymer Or the effect of less by-product content and easy process

Inactive Publication Date: 2006-12-27
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small power of the ultrasonic transducer in the ultrasonic melting extrusion device, it is not easy to amplify, and the high-power ultrasonic radiation needs to be isolated, protected and other technical problems, so this method is difficult to carry out large-scale industrialization modified

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 (stress-induced maleic anhydride functionalized HDPE): Take 0.30 kg of high-density polyethylene HDPE5000S (produced by Yangzi Petrochemical Company, MFR=1.1 g / 10 minutes), high-density polyethylene HDPE6070 (produced by Yangzi Petrochemical Company, MFR =7.0 grams / 10 minutes) 0.63 kilograms, get maleic anhydride (MAH) 30 grams, be dissolved in the acetone solvent of 30ml, and mix with above-mentioned HDPE, place. After the acetone solvent is fully volatilized, it is added to a high-speed, high-shear co-rotating twin-screw extruder for functionalization. The screw diameter of the twin-screw extruder is φ20mm, the length-to-diameter ratio is L / D=32, and the thread combination type is suitable for ordinary glass fiber reinforced plastics. The speed of the main screw is 800rpm, the speed of the feeding screw is 96rpm, the extrusion temperature: the front section is 185°C, the middle section is 175°C, and the feeding section is 160°C. After about 20 minutes of ext...

Embodiment 2

[0030] Example 2 (stress-induced dual monomer functionalized HDPE): Take 0.92 kg of high-density polyethylene HDPE5000S (produced by Yangzi Petrochemical Company, MI=1.1 g / 10 minutes), get 20 g of maleic anhydride, γ-(methyl 20 grams of acryloyloxy)propyltrimethoxysilane (A174, Nanjing Compton Shuguang Chemical Factory) was dissolved in 30 ml of acetone solvent, mixed evenly with the above-mentioned HDPE, and placed. After the acetone solvent is fully volatilized, it is added to a high-speed, high-shear co-rotating twin-screw extruder for functionalization. Extrusion temperature: front section 230°C, main screw rotating speed 840rpm, other same as embodiment 1. The grafting (block) rate of measuring product is 0.59%, and melt flow rate is 0.53 gram / 10 minutes, and infrared spectrum detection shows that in 1727cm -1 and 1121cm -1 There is a strong infrared characteristic absorption peak of the carbonyl of A174 and the silicon-oxygen bond.

Embodiment 3

[0032] Example 3 (stress-induced maleic anhydride-functionalized LLDPE): take 0.95 kg of linear low-density polyethylene LLDPE7042 (produced by Yangzi Petrochemical Company, MFR=2.0 g / 10 minutes), take 30 g of maleic anhydride, and dissolve in 10 gram of liquid paraffin, and after being uniformly mixed with the above-mentioned LLDPE, it is added to a high-speed, high-shear type co-rotating twin-screw extruder for functionalization. Extrusion temperature: front section 270°C, main screw rotating speed 800rpm, other same as embodiment 1. The measured graft (block) rate of the product was 0.44%, the melt flow rate was 3.34 g / 10 minutes, and the gel content of the product was 0.16%.

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Abstract

The invention relates to a new technology for functionalization reaction by fusing ANF squeezing polyolefin material, belonging to field of modifying polymer material. It comprises following steps: dissolving ethylene monomer into solvent and mixing it with polyolefin material, stewing, adding lubricant after solvent volatilization, filling them into parallel spin reverse-flighted screw extrusion machine with high rotation speed and high cutting, the squeezing temperature is between 160 to 350 Deg. C, the rotation speed of main bolt is between 350 to 1200 rmp, cooling, grain cutting and drying and getting final product. The method can inhibit or avoid cross bonding secondary reaction during functionalization reaction, increase grafting rate for function product and flux flowing speed, and is characterized by simple, high effective and easiness for industrialization.

Description

Technical field: [0001] The invention relates to a new technology for melt extrusion functionalization reaction of polyolefin materials, which belongs to the field of modification of polymer materials. Background technique: [0002] Due to the lack of polar groups, polyolefin materials have low surface energy, are difficult to print on the surface, paint or use as adhesives, have poor compatibility with other polymers, and have weak interaction with the surface of fibers and inorganic fillers. The toughening, strengthening or blending modification of polyolefin materials with other polymers has brought great difficulties. Therefore, the functional modification of polyolefin materials is a research hotspot and key technology to further improve the performance of polyolefin materials and expand the application field. [0003] At present, there are about three ways to functionalize polyolefin materials: copolymerization method, reactive group functionalization method and polym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/00C08F10/02C08F255/00C08F4/28B29C47/40B29C48/55
CPCB29C48/55
Inventor 张云灿张玲管祎嗣韩颖
Owner NANJING UNIV OF TECH
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