Acid-and-alkali-resistant chemically modified PET composite material and preparation method thereof

A technology of chemical modification and composite material, applied in the field of chemical modification of PET composite material and its preparation, can solve the problems of poor thermodynamic compatibility, difficult to achieve miscibility, unstable performance, etc., to improve compatibility and meet mechanical requirements. The effect of improving performance and acid and alkali resistance

Active Publication Date: 2019-04-16
宁波力达得为高分子科技有限公司
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  • Application Information

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Problems solved by technology

However, if the structure of the modified filler and the masterbatch is quite different, the thermodynamic compatibility is poor, and it is difficult to achieve engineering miscibility, especially as the time after the blending operation is completed, the phase separation phenomenon becomes more obvious, resulting in poor performance. instability and deterioration

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  • Acid-and-alkali-resistant chemically modified PET composite material and preparation method thereof
  • Acid-and-alkali-resistant chemically modified PET composite material and preparation method thereof
  • Acid-and-alkali-resistant chemically modified PET composite material and preparation method thereof

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Embodiment Construction

[0032] In order to further understand the content of the present invention, the present invention will be described in detail below in conjunction with specific embodiments. Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the technical field.

[0033] General synthesis method of modified PET resin:

[0034] The modified PET resin is prepared by polycondensation of terephthalic acid (TPA) and a glycol mixture. The glycol mixture is ethylene glycol (EG) with a molar ratio of 1:0.1-0.3:0.03-0.15. The mixture of propoxy bisphenol A (D33) and neopentyl glycol (NPG), the ratio of terephthalic acid and diol is 20%-30% of stoichiometric excess of diol; After the reaction is completed, a certain amount of diphenylmethane diisocyanate (MDI) is added for blocking treatment, and then the modified PET resin is obtained by cooling and filtering.

[0035] Specific steps are as follows:

[0036] (1) Es...

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Abstract

The invention provides an acid-and-alkali-resistant chemically modified PET composite material. The material is characterized by comprising, by weight, 65-75 parts of modified PET resin, 6-9 parts ofstearic acid modified glass fiber, 3-5 parts of a crystallization promoter, 3-5 parts of a chain repairing agent, 1-1.5 parts of an antioxidant, 0.5-1 part of a nucleating agent and 0.3-0.8 part of lubricant. The modified PET resin is obtained through polycondensation of p-phthalic acid (TPA) and a dihydric alcohol mixture, and the dihydric alcohol mixture is a mixture of ethylene glycol (EG), propoxy bisphenol A (D33) and neopentyl glycol (NPG). The stearic acid modified glass fiber is prepared by grafting stearic acid groups on glass fiber. The chemically modified PET composite material is good in mechanical property, high in transparency and excellent in acid and alkali resistance; after the material is soaked in 5 wt% HCl and NaOH for 30 days, good mechanical property intensity can still be maintained, a preparation method is simple, the raw materials are easy to obtain, and the material is suitable for industrial production.

Description

Technical field [0001] The invention relates to the technical field of polymer materials, in particular to a chemically modified PET composite material resistant to acid and alkali and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) has excellent comprehensive properties and low price. There are rigid groups on the main molecular chain and the molecular chain has a high degree of symmetry. It has physical and mechanical properties, heat resistance, electrical properties and cost. Film properties and other properties are very excellent, is a mature, industrialized thermoplastic resin, widely used in engineering plastics, fiber textile and film industries; especially in the application of engineering plastics, compared to other traditional engineering plastics, such as Polyamide (PA), polycarbonate (PC), etc. have extremely high cost performance, so they are extremely competitive. [0003] Since the pH of the environment may change during...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L71/02C08K13/06C08K9/04C08K9/06C08K7/14C08G63/672C08G63/91
CPCC08G63/672C08G63/916C08L67/02C08L71/02C08K13/06C08K9/04C08K9/06C08K7/14
Inventor 王鑫
Owner 宁波力达得为高分子科技有限公司
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