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Preparation method of polyamide/styrene comb-shaped graft polymer

A graft polymer, styrene technology, applied in the field of preparation of polyamide/styrene comb graft polymers, can solve the problems of high cost, difficult to avoid defects, complicated methods, etc., and achieves process controllability and expansion. The effect of simple use and production process

Active Publication Date: 2011-07-06
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the synthesis process of this type of graft polymer is an uncontrolled process, and it cannot be guaranteed that all the grafted comonomers are connected to the surface of the polymer to form a graft polymer and may form a homopolymer alone.
The second is that the polymerization process is uncontrollable, and the grafting on the polymer skeleton may promote the degradation or crosslinking of the skeleton
However, the method is complex, the cost is high, and it is difficult to effectively avoid the defects that may be caused by the above-mentioned free radical polymerization and coordination polymerization.

Method used

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  • Preparation method of polyamide/styrene comb-shaped graft polymer
  • Preparation method of polyamide/styrene comb-shaped graft polymer
  • Preparation method of polyamide/styrene comb-shaped graft polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 220ml of styrene (St) and 8ml of 3-isopropenyl-a, a'-dimethylbenzyl isocyanate (TMI) into 100ml of toluene solvent. With magnetic stirring, the temperature was raised to 80° C. under the protection of nitrogen, and then 0.8 g (accounting for about 4 wt % of the total weight of styrene and TMI) of AIBN was added to react at constant temperature for 24 hours. The resulting product was precipitated with methanol, dissolved in tetrahydrofuran, and repeated four times to completely remove small molecules. Finally, vacuum drying at 100° C. for 24 h yielded a white solid of copolymer P(St-co-TMI).

[0025] Take 100g of P(St-co-TMI) and add it to 900g of caprolactam / laurolactam (monomer molar ratio: 1:1) mixed monomer, heat to 180°C and stir until fully dissolved, at this time the solution is transparent. Then add 4wt% of sodium caprolactam (based on the total weight of the system), shake quickly and leave to react for 30 minutes to obtain a comb polymer. The mechanical p...

Embodiment 2

[0027] Add 220ml of styrene (St) and 8ml of 3-isopropenyl-a, a'-dimethylbenzyl isocyanate (TMI) into 100ml of toluene solvent. With magnetic stirring, the temperature was raised to 80° C. under the protection of nitrogen, and then 0.8 g (accounting for about 4 wt % of the total weight of styrene and TMI) of AIBN was added to react at constant temperature for 24 hours. The resulting product was precipitated with methanol, dissolved in tetrahydrofuran, and repeated four times to completely remove small molecules. Finally, vacuum drying at 100° C. for 24 h yielded a white solid of copolymer P(St-co-TMI).

[0028] Take 150g of P(St-co-TMI) and add it to 850g of caprolactam / laurolactam (monomer molar ratio: 1:1) mixed monomer, heat to 180°C and stir until fully dissolved, at this time the solution is transparent. Then add 4wt% of sodium caprolactam (based on the total weight of the system), shake quickly and leave to react for 30 minutes to obtain a comb polymer. The mechanical p...

Embodiment 3

[0030] Add 220ml of styrene (St) and 8ml of 3-isopropenyl-a, a'-dimethylbenzyl isocyanate (TMI) into 100ml of toluene solvent. With magnetic stirring, the temperature was raised to 80° C. under the protection of nitrogen, and then 0.8 g (accounting for about 4 wt % of the total weight of styrene and TMI) of AIBN was added to react at constant temperature for 24 hours. The resulting product was precipitated with methanol, dissolved in tetrahydrofuran, and repeated four times to completely remove small molecules. Finally, vacuum drying at 100° C. for 24 h yielded a white solid of copolymer P(St-co-TMI).

[0031] Take 200g of P(St-co-TMI) and add it to 800g of caprolactam / laurolactam (monomer molar ratio: 1:1) mixed monomer, heat to 180°C and stir until fully dissolved, at this time the solution is transparent. Then add 4wt% of sodium caprolactam (based on the total weight of the system), shake quickly and leave to react for 30 minutes to obtain a comb polymer. The mechanical p...

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Abstract

The invention relates to a preparation method of a polyamide / styrene comb-shaped graft polymer. The method comprises the following steps of: (1) dissolving styrene and a monomer A in a solvent, putting the mixture into a heated oil bath, introducing nitrogen while stirring magnetically, raising the temperature to 60-180 DEG C, adding a radical initiator B, and undergoing a reaction for 4-72 hoursto obtain a macromolecular activator C; and (2) heating the macromolecular activator C and a lactam monomer D to a molten state, adding a catalyst into a molten system, and undergoing a reaction for 0.5-1 hour to obtain the comb-shaped polymer. Compared with the prior art, the preparation method provided by the invention has the advantages of simple production technology, controllable process andthe like.

Description

technical field [0001] The invention relates to a polyamide / styrene comb graft polymer, in particular to a preparation method of the polyamide / styrene comb graft polymer. Background technique [0002] In recent years, commercial polymers with hydrophilicity have received more and more attention and applications from academia and industry. Although hydrophobic polymers generally have the best mechanical, thermodynamic, and chemical stability in many applications, hydrophobic polymers and their articles are generally difficult to wet and foul on their surfaces. In order to make full use of the excellent properties of the improved hydrophobic polymer and avoid its shortcomings, a series of improvement work has been carried out on it. [0003] The most common method is to coat such polymers with hydrophilic substances by using covalent bond chains or surface adsorption. However, this method also requires many additional processing steps while improving its hydrophilicity, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/20C08F212/08C08F212/14C08F216/36C08F220/10C08F8/32
Inventor 吴波震杨桂生
Owner HEFEI GENIUS NEW MATERIALS
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