Polypropylene graft copolymer, its production and use

A polypropylene graft and copolymer technology, applied in the field of polypropylene graft copolymer and its preparation and application, can solve the problems of many side reactions, harsh reaction conditions, low ionization efficiency, etc., to improve blending compatibility sexual effect

Inactive Publication Date: 2006-11-01
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is difficult to precisely control the structure of functionalized polyolefin and the distribution of functional groups, and there are many side reactions.
In addition, some researchers use ionic polymerization (cationic polymerization and anionic polymerization) to prepare polyolefin graft copolymers (H.L.Lu et al., Journal of Polymer Science: Part A: Polymer Chemistry, 1999, 37, 4176-4183 ; Yingying Lu et al., Polymer International, 2004, 53(12), 1963-1967), but this method has low ionization efficiency and harsh reaction conditions

Method used

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  • Polypropylene graft copolymer, its production and use
  • Polypropylene graft copolymer, its production and use
  • Polypropylene graft copolymer, its production and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, preparation polypropylene graft polystyrene copolymer

[0032] 1. Preparation of hydroxyl-containing polypropylene copolymer

[0033]Polymerization was carried out in a 250ml three-neck glass flask. First, vacuumize and pass the propylene gas. After repeating the above operation three times, the propylene gas is kept at 1MPa; 50mL of toluene is added to the reactor, and at 50°C, 2ml of a heptane solution of triisobutylaluminum (1.8mol / L), 2g boron-containing monoene monomer (m in formula II is 4), 3g of diphenyldimethoxysilane (DDS) and 0.1g Ziegler-Natta catalyst (titanium tetrachloride supported on magnesium chloride , wherein the Ti content is 3% of the total weight of the catalyst); the reaction was stirred at 50°C for 1 hour, after the polymerization reaction was completed, at 0°C, 30mL of 1.2g / mL hydrogen peroxide tetrahydrofuran solution and 10mL of 0.3g / mL hydrogen peroxide solution were added After the sodium aqueous solution, hydrolysis was ca...

Embodiment 2

[0039] Embodiment 2, preparation polypropylene graft polymethyl methacrylate copolymer

[0040] Take a 250ml three-necked flask, add 20.0g of the polypropylene-based atom transfer radical polymerization initiator obtained in Step 2 of Example 1, add 100ml of anisole, add 0.1g of cuprous chloride, and 0.05ml of pentamethyldiethylenetriamine , add 30g of methyl methacrylate, keep the reaction temperature at 95°C, react for 2 hours, precipitate with excess 10% hydrochloric acid ethanol, filter to obtain a white solid, fully wash with water and ethanol, and dry in vacuum to obtain polypropylene grafted polymer Methyl methacrylate copolymer 31.0g, its 1 H-NMR characterization as figure 2 , indicating that the structure of the obtained product is correct.

[0041] The copolymer had a number average molecular weight of 112600 g / mol (n=1352, k=558) and a molecular weight distribution of 4.56.

Embodiment 3

[0042] Embodiment 3, preparation polypropylene graft poly-p-methylstyrene copolymer

[0043] 1. Preparation of hydroxyl-containing polypropylene copolymer

[0044] Polymerization was carried out in a 250 mL three-neck glass flask. First, vacuumize and pass propylene gas. After repeating the above operation three times, keep the propylene gas at 1MPa; put 50ml of pentane into the reactor, and then add 1mL of triethylaluminum in heptane solution (1.8mol / L), 0.1g boron-containing monoene monomer (m in formula II is 4), 2g of diphenyldimethoxysilane (DDS) and 0.1g Ziegler-Natta catalyst (titanium tetrachloride supported on magnesium chloride above, where the Ti content is 3% of the total weight of the catalyst); stirring at 50°C for 1 hour; after the polymerization reaction, at 0°C, add 30mL 1.2g / mL hydrogen peroxide tetrahydrofuran solution and 10mL 0.3g / mL hydrogen peroxide After potassium aqueous solution, hydrolysis was carried out at 40° C. for 10 hours; then, a white soli...

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Abstract

A polypropylene graft copolymer, its production and use are disclosed. In the molecular formula, n is integer between 50-100000, k is integer between 10-5000, L is integer between 4-10, R is alkyl, R1 is H or methyl, R2 is phenyl, p-methyl, -OCOCH3, -CONH2, -CN or -COOR3, and R3 is alkyl. It can adjust graft density and length, and maintain polypropylene excellent performances and blending compatibility. It can be used for blending compatilizer.

Description

technical field [0001] The invention relates to a polypropylene graft copolymer and its preparation method and application. Background technique [0002] At present, the total volume output of polymer materials has exceeded that of metals, and plastics account for about 2 / 3 of polymer materials. Polypropylene has become one of the most consumed types of plastics due to its good mechanical properties, electrical insulation, chemical stability, processing performance and low price. It is widely used in food packaging, utensils, insulating materials, auto parts, Household appliances and other fields closely related to daily life, industrial and agricultural production. However, since the polypropylene chain does not contain any polar groups, its low-temperature impact resistance is poor, it is not easy to color, low hygroscopicity, poor adhesion and blending compatibility with other polymers, which greatly limits the ability of poly Further applications of acrylic materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08L51/06
Inventor 董金勇张辽云郭存悦胡友良黄明宝
Owner INST OF CHEM CHINESE ACAD OF SCI
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