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Polypropylene block copolymer and its preparation process and use

A polypropylene block and copolymer technology, which is applied to the polypropylene block copolymer and its preparation and application fields, can solve the problems of difficult product purification, difficult reaction control, and harsh conditions.

Inactive Publication Date: 2006-10-11
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Synthetic polyolefin block copolymer mainly contains two kinds of methods at present: a kind of is under Ziegler-Natta catalyst or metallocene catalyst catalysis, two kinds of monomers carry out copolymerization (Soga K, Yanagihara H.Macromolecules, 1989,22,2875; Xu Guangguang, Lin Shangan, Acta Polymerica Sinica, 1996, 4(4): 416; Xu Guangguang, Lin Shangan, Acta Polymerica Sinica, 1996, 5(5): 583), but this method is not suitable for polar monomers, polymers The molecular weight cannot be adjusted conveniently, and the product purification is difficult
The second method is to utilize the living polymerization technique, which can precisely control the chain length and the molecular weight distribution of the polymer, such as Chung et al. (B.Lu and T.C.Chung, Macromolecules , 1999,32,2525; T.C.Chung, H.L.Lu, Polymer, 1997,38,1495), coordination polymerization and living anion polymerization have prepared polypropylene block copolymers, but these methods require harsh conditions, The reaction is not easy to control

Method used

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  • Polypropylene block copolymer and its preparation process and use
  • Polypropylene block copolymer and its preparation process and use
  • Polypropylene block copolymer and its preparation process and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Embodiment 1, preparation polypropylene block polystyrene copolymer

[0073] 1. Preparation of polypropylene terminated with styrene monomer units

[0074] Polymerization was carried out in a stainless steel reactor equipped with mechanical stirring. First use nitrogen gas to pump three times, then use propylene gas to pump twice, add 100ml toluene, 2ml styrene, 2.5mmol methylaluminoxane (MAO), 2.5μmol dimethylsiloxane bis(2-methyl -4-naphthyl-indenyl) zirconium dichloride, first feed 0.1MPa hydrogen, then feed a certain pressure of propylene gas, and finally keep the pressure of propylene at 0.7MPa, and the polymerization reaction continues at 35°C for 30 minutes. Then, the material was discharged, precipitated with hydrochloric acid ethanol, filtered to obtain a white solid, washed twice with tetrahydrofuran, and dried in vacuum at 60°C to obtain polypropylene with styrene monomer units at the end.

[0075] 2. Preparation of polypropylene-based atom transfer radical...

Embodiment 2

[0079] Embodiment 2, preparation polypropylene block poly-p-methyl polystyrene copolymer

[0080] Polymerization was carried out in a stainless steel reactor equipped with mechanical stirring. First use nitrogen gas to pump three times, then use propylene gas to pump twice, add 100ml toluene, 0.1ml styrene, 0.01mmol methylaluminoxane (MAO), 0.3μmol dimethylsiloxane bis(2-methyl Base-4-naphthyl-indenyl) zirconium dichloride, first pass in 0.1MPa hydrogen, then pass in a certain pressure of propylene gas, and finally keep the pressure of propylene at 0.7MPa, and the polymerization reaction continues at 35°C for 30min. Then, the material was discharged, precipitated with hydrochloric acid ethanol, filtered to obtain a white solid, washed twice with tetrahydrofuran, and then vacuum-dried at 60°C to obtain polypropylene with a styrene structural unit at the end.

[0081] In a 250ml three-necked flask, add 3.0g of polypropylene with a styrene structural unit at the end, 100ml of ca...

Embodiment 3

[0084] Embodiment 3, preparation polypropylene block polyvinyl acetate copolymer

[0085] Polymerization was carried out in a stainless steel reactor equipped with mechanical stirring. First pumped three times with nitrogen gas, then pumped twice with propylene gas, added 100ml hexane, 10ml styrene, 50mmol methylaluminoxane (MAO), 50μmol dimethylsilyl bridge bis(2-methyl -4-naphthyl-indenyl) zirconium dichloride, first feed 0.1MPa hydrogen, then feed a certain pressure of propylene gas, finally keep the pressure of propylene at 0.7MPa, and continue the polymerization reaction at 35°C for 10 minutes. Then, the material was discharged, precipitated with hydrochloric acid ethanol, filtered to obtain a white solid, washed twice with tetrahydrofuran, and then vacuum-dried at 60°C to obtain polypropylene with a styrene structural unit at the end.

[0086] In a 250ml three-necked flask, add 6.0g of polypropylene with a styrene structural unit at the end, 100ml of toluene, 4.0g of ch...

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Abstract

This invention is the preparation method and application of polypropylene block copolymer. Polypropylene block copolymer's structure is depicted as followings. m is integer between 100-100000,and n is integer between 10-5000. R1 is H or methyl; R2 is phenyl group, p-tolunitrile, -OCOCH3,-CONH2,-CN or -COOR, R is acroleic acid. Polypropylene block copolymer reported here is characteristic with flexible molecule weight and narrow range. It also has a high fusion temperature and high crystallinity. By scaning with electron scanning microscope, we could find this block copolymer could get into polypropylene and other polymers mixtures. It could change their blending consistency, is an efficient blending consistency agent.

Description

technical field [0001] The invention relates to a polypropylene block copolymer and its preparation method and application. Background technique [0002] Although polyolefins are widely used due to their high performance-price ratio and excellent processability, due to the lack of reactive groups in polyolefins, their adhesiveness, blending compatibility with other substances and dyeability are poor, thus The further application of polyolefin materials is greatly limited. Block copolymers and graft polymers are effective compatibilizers that improve interfacial interactions between polyolefins and other polymeric materials (Teyssie, P., Fayt, R. and Jerome, R. Makromol. Chem. Macromol. Symp. 1988, 16, 41; Favis, B.D., Can. J. Chem. Eng., 1991, 69, 619). [0003] Synthetic polyolefin block copolymer mainly contains two kinds of methods at present: a kind of is under Ziegler-Natta catalyst or metallocene catalyst catalysis, two kinds of monomers carry out copolymerization (S...

Claims

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Application Information

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IPC IPC(8): C08F295/00
Inventor 董金勇张辽云范国强郭存悦胡友良黄明宝
Owner INST OF CHEM CHINESE ACAD OF SCI
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