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Aromatic polycarbonate and preparation method thereof

A polycarbonate and aromatic technology, applied in the field of aromatic polycarbonate and its preparation, can solve the problems of product mechanical properties change, product qualification rate reduction, free volume reduction, etc., to reduce the brittleness change of resin annealing treatment, The effect of improving flexibility and athletic ability, improving usability and effect

Active Publication Date: 2014-04-23
WANHUA CHEMICAL (NINGBO) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the annealing treatment can relax the internal stress, it will also make the molecular arrangement tend to be tighter, causing changes in the mechanical properties of the product, especially such as brittle transition, impact performance decline, etc., resulting in a lower product qualification rate and increased production costs.
Previous studies have shown that the brittle transition caused by annealing treatment is due to the fact that the annealing treatment increases the packing degree of PC molecular chains, reduces the free volume, and the movement of small groups or small chain segments and large chain segments on the main chain is affected. It is not conducive to the rapid relaxation of external loads, thus affecting the toughness and brittleness of the material (Ke Yucai, Ma Xiru, Pan Pinglai, etc., Effect of heat treatment on PC's β transition and toughness and brittleness, Polymer Materials Science and Engineering, 1992, 56-60)

Method used

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  • Aromatic polycarbonate and preparation method thereof
  • Aromatic polycarbonate and preparation method thereof
  • Aromatic polycarbonate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Mix 200g of BPA, 1000g of water, 240g of 30% NaOH solution, 0.12g of hydrosulfite, 0.45g of diethylene glycol, and 2000g of dichloromethane to dissolve all the BPA. Feed phosgene under stirring condition, the phosgene flow rate is controlled at 1.5-2.0g / min, and the pH is adjusted with 30% NaOH solution, and the pH is controlled to be 12-13. When the total amount of phosgene is 90.97g, stop the photochemical Add 3.35g of p-tert-butylphenol and 0.46g of triethylamine, stir until no acid chloride groups exist in the system, and continue stirring for 30min while maintaining the pH at 12-13. The water phase was separated and removed, the oil phase was acidified with hydrochloric acid solution to adjust the pH<3.0, the oil and water were separated again, the oil phase was washed with water until neutral, and the solid was collected by methanol precipitation. Product molecular weight is detected by GPC.

[0071] The solid obtained above was granulated and injected into corre...

Embodiment 2

[0073] Mix 200g of BPA, 1000g of water, 240g of 30% NaOH solution, 0.12g of hydrosulfite, and 2000g of dichloromethane to dissolve all the BPA. Feed phosgene under stirring condition, the phosgene flow rate is controlled at 1.5-2.0g / min, and the pH is adjusted with 30% NaOH solution, and the pH is controlled to be 12-13. When the total amount of phosgene is 90.97g, stop the photochemical Add 1.78g of diethylene glycol, 3.35g of p-tert-butylphenol, and 0.46g of triethylamine, stir until no acid chloride groups exist in the system, and continue stirring for 30min while maintaining the pH at 12-13. The water phase was separated and removed, the oil phase was acidified with hydrochloric acid solution to adjust the pH<3.0, the oil and water were separated again, the oil phase was washed with water until neutral, and the solid was collected by methanol precipitation. Product molecular weight is detected by GPC.

[0074] The solid obtained above was granulated and injected into corr...

Embodiment 3

[0076]Mix 200g of BPA, 1000g of water, 240g of 30% NaOH solution, 0.12g of hydrosulfite, 0.33g of triethylene glycol, and 2000g of dichloromethane to dissolve all the BPA. Feed phosgene under stirring condition, the phosgene flow rate is controlled at 1.5-2.0g / min, and the pH is adjusted with 30% NaOH solution, and the pH is controlled to be 12-13. When the total amount of phosgene is 90.97g, stop the photochemical Add 1.34g of p-tert-butylphenol and 0.46g of triethylamine, stir until no acid chloride groups exist in the system, and continue stirring for 30min while maintaining the pH at 12-13. The water phase was separated and removed, the oil phase was acidified with hydrochloric acid solution to adjust the pH<3.0, the oil and water were separated again, the oil phase was washed with water until neutral, and the solid was collected by methanol precipitation. Product molecular weight is detected by GPC.

[0077] The solid obtained above was granulated and injected into corre...

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Abstract

The invention provides aromatic polycarbonate. The main chain of the aromatic polycarbonate comprises non-aromatic structure micromolecule coupling group -O-[R1-O]k- or -N-[R1-N]k-, wherein R1 is ethylidene, propylidene or butylidene, k is 1-8, preferably 2-6. The aromatic polycarbonate can be prepared from bisphenol, coupling agent, end-capping reagent and phosgene through traditional interfacial polycondensation reaction.

Description

technical field [0001] The invention belongs to the field of polycarbonate, and more specifically the invention relates to an aromatic polycarbonate and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a general term for polyester corresponding to carbonic acid, and can be divided into aliphatic polycarbonate and aromatic polycarbonate. Aromatic polycarbonate refers to polycarbonate whose main chain structure is a benzene ring group. It is an engineering plastic with excellent performance, especially bisphenol A polycarbonate, which has impact resistance, transparency, non-toxicity and pollution-free, size Due to its excellent stability and dielectric properties, it is widely used in many fields, such as electronic appliances, films, automobiles, packaging, medical treatment, construction and so on. It is known that for aromatic polycarbonate, since the main chain is a rigid benzene ring structure, the molecular chain is forced to be oriente...

Claims

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Application Information

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IPC IPC(8): C08G64/14C08G64/24C08G64/38
Inventor 田秦刘应陈云吴俊张雷张宏科华卫琦
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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