A kind of recycled PC/ABS alloy material and its preparation method using macromolecular chain extender original repair modification

Abstract

The invention discloses a regenerated PC / ABS alloy material for origin restoration and modification by using a macromolecular chain expanding agent. The material is mainly prepared from the followingingredients in parts by mass: 100 parts of waste PC / ABS, 2 to 8 parts of ABS macromolecular chain expanders and 0.2 to 2 parts of chain expansion accelerators. The regenerated alloy material uses thein-situ chain expansion, in-situ volume increase and toughening effects of the macromolecular chain expanding agent; the molecular chain structure is restored; the phase interface is improved; the compatibility is improved; the glue content is improved; the regenerated plastic alloy material with good comprehensive performance is prepared; the waste is sufficiently utilized; the energy saving andemission reduction are realized. The invention also discloses a preparation method of the regenerated PC / ABS alloy material for origin restoration and modification by using the macromolecular chain expanding agent.

Description

technical field

[0001] The invention belongs to the technical field of regeneration of waste PC / ABS, and in particular relates to a recycled PC / ABS alloy material which is repaired and modified by a macromolecular chain extender and a preparation method thereof. Background technique

[0002] Polyacrylonitrile-butadiene-styrene (ABS) and polycarbonate (PC) are two very common plastics, both of which have significant advantages and disadvantages: Among them, ABS has good processability and is relatively cheap , but its heat resistance, weather resistance, and mechanical properties are not ideal; while PC has excellent heat resistance, mechanical properties, and dimensional stability, but it is not resistant to solvents, difficult to process, and prone to stress cracking.

[0003] After preparing ABS and PC into PC / ABS alloy material, it can learn from each other in terms of performance, so that compared with PC, it improves the machining performance and reduces stress sensitiv...

Examples

Embodiment 1

[0036] The regenerated PC / ABS alloy material provided in this embodiment is mainly composed of the following ingredients in proportions by mass:

[0037] Waste PC / ABS: 100

[0038] ABS-based macromolecular chain extender: 6

[0039] Chain extension accelerator: 1.

[0040] Wherein the ABS-based macromolecular chain extender is acrylonitrile-butadiene-styrene copolymer (ABS) grafted oxazoline, which is prepared by the following method: taking ABS high rubber powder, ethanolamine and zinc acetate as raw materials, 2 , 6-dichlorotoluene as a solvent, placed in a reaction vessel to adjust the temperature to 180 ° C cold reflux reaction for 2 hours, then freeze precipitation, suction filtration and drying, to obtain the macromolecular chain extender ABS grafted oxazoline.

[0041] The mass ratio of ABS high rubber powder, ethanolamine and zinc acetate is 100:30:2.

[0042] The consumption of 2,6-dichlorotoluene is 8 times of the total mass of raw material ABS high rubber powder....

Embodiment 2

[0049] The regenerated PC / ABS alloy material provided in this embodiment is composed of the following components by mass:

[0050] Waste PC / ABS: 100

[0051] Macromolecular chain extender: 8

[0052] Chain extension accelerator: 2.

[0053] Wherein the macromolecular chain extender is ABS grafted oxazoline, which is prepared by the following method: taking ABS high-glue powder, ethanolamine and zinc acetate as raw materials, 2,6-dichlorotoluene as solvent, and placing it in a reaction vessel to adjust The temperature is 170° C. after cold reflux reaction for 3 hours, and then the frozen precipitate is sucked and dried to obtain the macromolecular chain extender ABS grafted oxazoline.

[0054] The mass ratio of ABS high rubber powder, ethanolamine and zinc acetate is 100:50:3.

[0055] The consumption of 2,6-dichlorotoluene is 10 times of the total mass of raw material ABS high rubber powder.

[0056] Cryoprecipitates were cryoprecipitated in ethanol.

[0057] The chain ex...

Embodiment 3

[0062] The regenerated PC / ABS alloy material provided in this embodiment is mainly composed of the following ingredients in proportions by mass:

[0063] Waste PC / ABS: 100

[0064] Macromolecular chain extenders: 4

[0065] Chain extension accelerator: 0.5.

[0066] Wherein the ABS-based macromolecular chain extender is the same as in Example 2.

[0067] The chain extension accelerator is the same as in Example 1.

[0068] Waste PC / ABS is with embodiment 1.

[0069] The regenerated PC / ABS alloy material comprises the following steps: mixing the waste PC / ABS and the chain extension accelerator according to the above dosage relationship to obtain a mixed material, adding the mixed material from the main feeding device of the twin-screw extruder to melt, and controlling the screw speed From the twin-screw extruder processing zone 4, add ABS-based macromolecular chain extender and blend with the melted mixture according to the above dosage relationship, and then extrude, pull,...

technical field

[0001] The invention belongs to the technical field of regeneration of waste PC / ABS, and in particular relates to a recycled PC / ABS alloy material which is repaired and modified by a macromolecular chain extender and a preparation method thereof. Background technique

[0002] Polyacrylonitrile-butadiene-styrene (ABS) and polycarbonate (PC) are two very common plastics, both of which have significant advantages and disadvantages: Among them, ABS has good processability and is relatively cheap , but its heat resistance, weather resistance, and mechanical properties are not ideal; while PC has excellent heat resistance, mechanical properties, and dimensional stability, but it is not resistant to solvents, difficult to process, and prone to stress cracking.

[0003] After preparing ABS and PC into PC / ABS alloy material, it can learn from each other in terms of performance, so that compared with PC, it improves the machining performance and reduces stress sensitiv...

Examples

Embodiment 1

[0036] The regenerated PC / ABS alloy material provided in this embodiment is mainly composed of the following ingredients in proportions by mass:

[0037] Waste PC / ABS: 100

[0038] ABS-based macromolecular chain extender: 6

[0039] Chain extension accelerator: 1.

[0040] Wherein the ABS-based macromolecular chain extender is acrylonitrile-butadiene-styrene copolymer (ABS) grafted oxazoline, which is prepared by the following method: taking ABS high rubber powder, ethanolamine and zinc acetate as raw materials, 2 , 6-dichlorotoluene as a solvent, placed in a reaction vessel to adjust the temperature to 180 ° C cold reflux reaction for 2 hours, then freeze precipitation, suction filtration and drying, to obtain the macromolecular chain extender ABS grafted oxazoline.

[0041] The mass ratio of ABS high rubber powder, ethanolamine and zinc acetate is 100:30:2.

[0042] The consumption of 2,6-dichlorotoluene is 8 times of the total mass of raw material ABS high rubber powder....

Embodiment 2

[0049] The regenerated PC / ABS alloy material provided in this embodiment is composed of the following components by mass:

[0050] Waste PC / ABS: 100

[0051] Macromolecular chain extender: 8

[0052] Chain extension accelerator: 2.

[0053] Wherein the macromolecular chain extender is ABS grafted oxazoline, which is prepared by the following method: taking ABS high-glue powder, ethanolamine and zinc acetate as raw materials, 2,6-dichlorotoluene as solvent, and placing it in a reaction vessel to adjust The temperature is 170° C. after cold reflux reaction for 3 hours, and then the frozen precipitate is sucked and dried to obtain the macromolecular chain extender ABS grafted oxazoline.

[0054] The mass ratio of ABS high rubber powder, ethanolamine and zinc acetate is 100:50:3.

[0055] The consumption of 2,6-dichlorotoluene is 10 times of the total mass of raw material ABS high rubber powder.

[0056] Cryoprecipitates were cryoprecipitated in ethanol.

[0057] The chain ex...

Embodiment 3

[0062] The regenerated PC / ABS alloy material provided in this embodiment is mainly composed of the following ingredients in proportions by mass:

[0063] Waste PC / ABS: 100

[0064] Macromolecular chain extenders: 4

[0065] Chain extension accelerator: 0.5.

[0066] Wherein the ABS-based macromolecular chain extender is the same as in Example 2.

[0067] The chain extension accelerator is the same as in Example 1.

[0068] Waste PC / ABS is with embodiment 1.

[0069] The regenerated PC / ABS alloy material comprises the following steps: mixing the waste PC / ABS and the chain extension accelerator according to the above dosage relationship to obtain a mixed material, adding the mixed material from the main feeding device of the twin-screw extruder to melt, and controlling the screw speed From the twin-screw extruder processing zone 4, add ABS-based macromolecular chain extender and blend with the melted mixture according to the above dosage relationship, and then extrude, pull,...

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