One-step method for synthesizing styrene/ N-benzyl maleimide/ maleic anhydride terpolymer

A technology of maleic anhydride terpolymer and maleimide is applied in the field of polymer heat-resistant and shock-resistant modifiers, which can solve the problems of complex process, unstable quality, complex equipment, etc., and achieve simplified process and reaction time. Short, small equipment investment effect

Inactive Publication Date: 2010-09-08
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method can solve synthesis problems such as complex equipment, complicated process and unstable quality in the prior art

Method used

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  • One-step method for synthesizing styrene/ N-benzyl maleimide/ maleic anhydride terpolymer
  • One-step method for synthesizing styrene/ N-benzyl maleimide/ maleic anhydride terpolymer
  • One-step method for synthesizing styrene/ N-benzyl maleimide/ maleic anhydride terpolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 15g N-PMI, 34g St, 1g MAH and 136mL xylene solvent into a 500mL reaction kettle, blow in nitrogen, blow out the residual air in the reaction kettle, raise the temperature to about 76°C, stir for 40-60min to form a homogeneous solution, Then rapidly raise the temperature to about 95°C, put in 0.25g of dibutyl peroxide o-(tere)phthalate, raise the temperature to about 125°C while reacting, and keep the pressure constant for 4 hours. After the reaction, the temperature was raised to boiling to evaporate the residual solvent and monomer, and then filtered and dried to obtain a light yellow powder product.

[0019] from figure 1 The following conclusions can be drawn from the comparison of polystyrene and styrene / N-PMI / MAH spectral lines in the infrared spectrum of styrene / N-PMI / MAH ternary copolymerization: 1777cm -1 and 1712cm -1 The carboxyl characteristic absorption peaks of maleic anhydride and N-phenylmaleimide respectively, 1454cm -1 , 1495cm -1 Benzene ring a...

Embodiment 2

[0026] Add 20g N-PMI, 29g St, 1g MAH and 136mL xylene solvent into a 500mL reaction kettle, blow in nitrogen, blow out the residual air in the reaction kettle, raise the temperature to about 76°C, stir for 40-60min to form a homogeneous solution, Then rapidly raise the temperature to about 95°C, put in 0.25g of dibutyl peroxide o-(tere)phthalate, raise the temperature to about 125°C while reacting, and keep the pressure constant for 4 hours. After the reaction, the temperature was raised to boiling to evaporate the residual solvent and monomer, and then filtered and dried to obtain a light yellow powder product.

Embodiment 3

[0028] Add 25g N-PMI, 24g St, 1g MAH and 136mL xylene solvent into a 500mL reaction kettle, blow in nitrogen, blow out the residual air in the reaction kettle, raise the temperature to about 76°C, stir for 40-60min to form a homogeneous solution, Then rapidly raise the temperature to about 95°C, put in 0.25g of dibutyl peroxide o-(tere)phthalate, raise the temperature to about 125°C while reacting, and keep the pressure constant for 4 hours. After the reaction, the temperature was raised to boiling to evaporate the residual solvent and monomer, and then filtered and dried to obtain a light yellow powder product.

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Abstract

The invention belongs to the technical field of macromolecular heat-resistant impact modifiers, and relates to a one-step method for synthesizing a styrene / N-benzyl maleimide / maleic anhydride terpolymer. The method prepares the terpolymer by adopting a solvent polymerization one-time feeding method; the chemical structure of the related heat-resistant impact modifier is the terpolymer of N-benzyl maleimide, styrene and maleic anhydride; the molar ratio of the N-benzyl maleimide to the styrene is 1: 1-1: 2, and the content of the maleic anhydride is 1.8 to 2.6 percent; and the terpolymer represents a single glass-transition temperature. The method can solve the integrated problems of complex equipment, complex process, instable quality and the like in the prior art. The method has the characteristics of simple preparation, short reaction time, low equipment investment and high economic return.

Description

technical field [0001] The invention belongs to the technical field of polymer heat-resistant and shock-resistant modifiers, and relates to a method for preparing a copolymer, in particular to a method for synthesizing styrene / N-phenylmaleimide / maleic anhydride terpolymer in one step . Background technique [0002] The prior art discloses that the heat resistance of polymer materials is an important aspect of its performance, and imide polymers have attracted widespread attention for their superior heat resistance. As one of them, N-phenylmaleimide is a new type of monomer developed in recent years to improve the heat resistance of resins. Styrene / N-phenylmaleimide / maleic anhydride terpolymer (St / N-PMI / MAH) due to the introduction of N-phenylmaleimide (N-PMI) and maleic anhydride (MAH), the imide ring structure in the molecular chain is increased, the maleic anhydride chemical reaction grafting functional group is introduced, the heat resistance of the polymer is significa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F222/40C08F2/06C08F222/08
Inventor 范仲勇胡益民董建廷逯琪孙猛卜海山
Owner FUDAN UNIV
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