Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Reinforced and toughened syndiotactic polystyrene and preparation method thereof

A polystyrene, strengthening and toughening technology, which is applied in the field of polystyrene preparation, can solve the problems of syndiotactic polystyrene without toughening and strengthening, and achieve the effects of easy sequence distribution, improving toughness and strength, and expanding application fields

Active Publication Date: 2019-09-20
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no literature on the syndiotactic selective polymerization of para-position long-chain alkane-modified styrene monomer and styrene, and there is no literature report on the use of long-chain alkane-substituted styrene monomer to toughen and strengthen syndiotactic polystyrene

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
  • Reinforced and toughened syndiotactic polystyrene and preparation method thereof
  • Reinforced and toughened syndiotactic polystyrene and preparation method thereof
  • Reinforced and toughened syndiotactic polystyrene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] The present invention also provides a method for preparing reinforced toughened syndiotactic polystyrene, comprising the following steps:

[0062] Under anhydrous and oxygen-free conditions, the organic solution of the catalyst composition is added to the mixed solution of styrene and styrene monomer modified by para-position long-chain alkane, and the copolymerization is carried out, and the enhanced toughening syndiotactic polymerization is prepared in situ. Styrene;

[0063] The reinforced and toughened syndiotactic polystyrene has a segment shown in formula (I):

[0064]

[0065] In formula (I), 0.5mol%

[0066] The styrene monomer modified by the para-position long-chain alkane has a structure shown in formula (II):

[0067]

[0068] In formula (II), 7≤m≤49;

[0069] The catalyst composition is composed of rare earth compound, organoboron salt and alkylaluminum.

[0070] The preparation method of the catalyst comp...

Embodiment 1

[0102] Under anhydrous and oxygen-free conditions, 10 μmol [Ph 3 C][B(C 6 f 5 ) 4 ] in 1 mL of toluene solution was poured into 2 mL of toluene solution of 10 μmol rare earth compound 2c, and then 200 μmol AiiBu was added 3 , configured as a toluene solution of the catalyst composition. The toluene solution of this catalyst composition is added in the 3 milliliters of toluene solutions that fill 2.062g styrene monomer (19.8mmol) and 0.0741g p-nonadecylstyrene monomer (0.2mmol), react at 25 ℃ for 1 Hours later, an ethanol solution containing an anti-aging agent was added to terminate the polymerization reaction, and the polymer obtained by sedimentation was dried in a vacuum oven at 50° C. for 48 hours to obtain the target product. The molar content of p-nonadecylstyrene structural units in the polymer is about 1.0%, and the number average molecular weight is 28.7×10 4 , the molecular weight distribution is 2.02, the glass transition temperature is 91°C, and the melting te...

Embodiment 2～12

[0103] Examples 2-12: The experimental procedures of this series of examples are the same as those of Example 1, and the polymerization reaction conditions, the change conditions of the catalytic system and the polymerization results are described in detail in the following table.

[0104]

[0105] The polymerization conditions are: the amount of rare earth compound is 10 μmol, [Ln]:[Ph 3 C][B(C 6 f 5 ) 4 ]:[Al i Bu 3 ] = 1:1:20 (mol / mol / mol), the concentration of the monomer in toluene solution is 2mol / L, [a] high temperature GPC: take polystyrene as the standard sample, 1,2,4- Trichlorobenzene as eluent, the measured value obtained. [b] Measured by DSC, after eliminating the thermal history, the heating rate is 10°C / min. The c polymerization condition is [Ln]:[Ph 3 C][B(C 6 f 5 ) 4 ]:[Al i Bu 3 ]=1:1:40 (molar ratio). [d] The aggregation condition is [Ln]:[Ph 3 C][B(C 6 f 5 ) 4 ]:[Al i Bu 3 ]=1:1:100 (molar ratio). Ln represents the central metal of th...

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

PropertyMeasurementUnit
melting pointaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention relates to reinforced and toughened syndiotactic polystyrene and a preparation method thereof. The reinforced and toughened syndiotactic polystyrene is prepared by copolymerizing a para-position long-chain alkane modified styrene monomer and styrene, wherein the molar content of a para-position long-chain alkane modified styrene structural unit in a copolymer is 0.5-20 mol%, and long-chain alkane is composed of nine and more carbon atoms; and a microstructure of the reinforced and toughened syndiotactic polystyrene is syndiotactic. The copolymerization of the para-position long-chain alkane modified styrene monomer and styrene is catalyzed in an organic solution by utilizing a rare earth catalyst composition composed of a rare earth compound, an organic boron salt and aluminum alkyl. A polyethylene chain segment is directly introduced to a side chain the syndiotactic polystyrene by using a direct copolymerization method, so that the toughness and strength of the syndiotactic polystyrene can be effectively improved, and an effective solution is provided for widening the application field of the syndiotactic polystyrene and lowering the processing and molding difficulty of the syndiotactic polystyrene by properly reducing the melting temperature of the syndiotactic polystyrene. Meanwhile, the preparation method is simple and easy and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of polystyrene preparation, in particular to a reinforced and toughened syndiotactic polystyrene and a preparation method thereof. Background technique [0002] Syndiotactic polystyrene is a new type of engineering plastic with high elastic modulus, high heat resistance, strong resistance to solvents and chemical agents, and a melting temperature as high as 270 °C. The first use of the single titanocene catalyst CpTiCl by the Japanese Ishihara 3 / MAO is synthesized for the first time. However, the problems of high brittleness and too narrow processing temperature window of syndiotactic polystyrene plague the industry and academia. In order to solve the defects of syndiotactic polystyrene, researchers from RIKEN, Japan, used a single rare earth catalyst to randomly copolymerize styrene and ethylene syndiotactically, and prepared syndiotactic polystyrene with different ethylene content. Ethylene-styrene cop...

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): C08F212/08C08F212/12C08F4/52
CPCC08F212/08C08F212/12C08F4/52
Inventor 崔冬梅李世辉
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com