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Polyarylene sulfide and a preparation method thereof

Inactive Publication Date: 2015-07-16
SK CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a type of polyarylene sulfide that can be easily mixed with other polymers or fillers due to its ends having carboxyl or amine groups. This allows for optimal properties and unique effects when combined with other materials. The polyarylene sulfide can be used in various applications, including compounding. Overall, the invention provides a versatilizable and effective material for use in various industries.

Problems solved by technology

However, when the polyarylene sulfide is prepared by such Macallum process, a salt type by-product may be formed in a solution polymerization process using sodium sulfide, and thus there is a disadvantage of requiring a washing or drying process for eliminating a salt type by-product or a residual organic solvent.
Furthermore, since the polyarylene sulfide prepared by such Macallum process is a powder form, the post processability and workability may decrease.
Therefore, there was a disadvantage of that such polyarylene sulfide was inferior in the compatibility with other polymer materials or all sorts of reinforcements or fillers like glass fiber and the like due to the characteristics of its main chain structure.
Due to this, it was hard to compound the polyarylene sulfide prepared by the melt-polymerization method with other polymer materials or fillers for securing optimized properties suitable to various uses, and it was difficult to show optimized properties even if it was compounded with them.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Synthesis of Polyarylene Sulfide Including Carboxyl Group or Amine Group at the End of the Main Chain

[0055]After completely melting and mixing the reactant including 5,130 g of p-diiodobenzene (p-DIB), 450 g of sulfur, and 4 g of 1,3-diiodo-4-nitrobenzene as a reaction initiator in a 5L reactor equipped with a thermocouple capable of measuring the inside temperature of the reactor and a vacuum line for nitrogen purging and vacuumizing by heating the same to 180° C., the polymerization reaction was proceeded by carrying out temperature-rising and pressure reducing step by step from the initial reaction condition of 220° C. and 350 torr to the final reaction temperature of 300° C. and the pressure of 1 torr or less. When the polymerization reaction was proceeded 80% (the proceeding degree of the polymerization reaction was identified by the relative viscosity ratio [(present viscosity / target viscosity)*100%], and the present viscosity was measured with a viscometer after taking a samp...

example 2

Synthesis of Polyarylene Sulfide Including Carboxyl Group or Amine Group at the End of the Main Chain

[0057]After completely melting and mixing the reactant including 5,130 g of p-diiodobenzene (p-DIB), 450 g of sulfur, and 4 g of 1,3-diiodo-4-nitrobenzene as a reaction initiator in a 5L reactor equipped with a thermocouple capable of measuring the inside temperature of the reactor and a vacuum line for nitrogen purging and vacuumizing by heating the same to 180° C., the polymerization reaction was proceeded by carrying out temperature-rising and pressure reducing step by step from the initial reaction condition of 220° C. and 350 torr to the final reaction temperature of 300° C. and the pressure of 1 torr or less. When the polymerization reaction was proceeded 80% (the proceeding degree of the polymerization reaction was identified by the relative viscosity ratio [(present viscosity / target viscosity)*100%], and the present viscosity was measured with a viscometer after taking a samp...

example 3

Synthesis of Polyarylene Sulfide Including Carboxyl Group or Amine Group at the End of the Main Chain

[0059]After completely melting and mixing the reactant including 5,130 g of p-diiodobenzene (p-DIB), 450 g of sulfur, and 4 g of 1,3-diiodo-4-nitrobenzene as a reaction initiator in a 5L reactor equipped with a thermocouple capable of measuring the inside temperature of the reactor and a vacuum line for nitrogen purging and vacuumizing by heating the same to 180° C., the polymerization reaction was proceeded by carrying out temperature-rising and pressure reducing step by step from the initial reaction condition of 220° C. and 350 torr to the final reaction temperature of 300° C. and the pressure of 1 torr or less. When the polymerization reaction was proceeded 80% (the proceeding degree of the polymerization reaction was identified by the relative viscosity ratio [(present viscosity / target viscosity)*100%], and the present viscosity was measured with a viscometer after taking a samp...

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Abstract

The present invention relates to a polyarylene sulfide having more improved miscibility with other polymer materials or fillers, and a method of preparing the same. At least part of end groups of the main chain of the polyarylene sulfide is carboxyl group (—COOH) or amine group (—NH2).

Description

TECHNICAL FIELD [0001]The present invention relates to a polyarylene sulfide having more improved compatibility with other polymer materials or fillers, and a method of preparing the same.BACKGROUND OF THE INVENTION [0002]Now, polyarylene sulfide is a representative engineering plastic, and the demand for the products being used in a high temperature and corrosive environment or the electronic goods is increasing due to its high heat resistance and chemical resistance, flame resistance, electric insulation, and so on.[0003]Among the polyarylene sulfides, polyphenylene sulfide (PPS) is one and only commercially on sale now. The commercial preparation process of PPS being applicable until now is the method of carrying out a solution polymerization of p-dichlorobenzene (pDCB) and sodium sulfide in a polar organic solvent such as N-methylpyrrolidone. The method is known as Macallum process.[0004]However, when the polyarylene sulfide is prepared by such Macallum process, a salt type by-p...

Claims

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Application Information

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IPC IPC(8): C08G75/14C08G75/02
CPCC08G75/14C08G75/02C08L81/02C08G75/029C08J5/18D01F6/765C08J2375/02C08L81/04
Inventor LEE, SE-HOKIM, SUNG-GI
Owner SK CHEM CO LTD