CN104312131A - Preparation method of polyphenyl ether plastic - Google Patents

Abstract

The invention relates to a preparation method of polyphenyl ether plastic. The polyphenyl ether plastic is prepared from the following components in percentage by weight: 25-35% of polyphenyl ether, 10-20% of nylon 66, 3-5% of styrene, 3-5% of UHMWPE (ultrahigh molecular weight polyethylene), 10-12% of carbon fibers, 3-5% of carbon black, 2-3% of graphite, 5-10% of a compatilizer, 5-10% of a flexibilizer and 0.5-1.5% of auxiliaries.

Description

A kind of polydiphenyl ether plastics preparation method

Technical field

The invention belongs to polymeric material field, refer to a kind of polydiphenyl ether plastics preparation method especially.

Background technology

PPO (polyphenylene oxide) resin and PA66 (nylon66 fiber) resin are one of widely used engineering plastics.PPO has high heat-resisting, and dimensional stabilizing, electric insulating quality is good, but its processing fluidity is poor, not organic solvent-resistant.PA66 belongs to crystalline material, good fluidity, organic solvent-resistant, but it easily absorbs water, poor dimensional stability.UHMWPE (ultrahigh molecular weight polyethylene(UHMWPE)) is a kind of thermoplastic engineering plastic with Good All-around Property of linear structure.

PPO/PA66 synthetic plastics combines the performance of PPO and PA66, and with the thermotolerance of its excellence, good processibility, can sprayability etc. be used widely.At present, most enhancement type PPO/PA66 synthetic plastics adopts glass fibre to strengthen, and obtained density of material is comparatively large, and strength enhancing is inadequate, does not possess antistatic effect.

Summary of the invention

The object of this invention is to provide a kind of polydiphenyl ether plastics, solve existing PPO/PA66 synthetic plastics intensity and the not strong problem of antistatic property.

The present invention is achieved through the following technical solutions:

A kind of polydiphenyl ether plastics preparation method, comprises the following steps:

First, percentage composition comprises following component by weight: the polyphenylene oxide of 25-35%, the nylon66 fiber of 10-20%, the vinylbenzene of 3-5%, the carbon black of the UHMWPE of 3-5%, 3-5%, the graphite of 2-3%, the compatilizer of 5-10%, the toughner of 5-10%, the auxiliary agent mixing of 0.5-1.5%, obtained mixture;

Secondly, this mixture is extruded process with the screw extrusion press that length-to-diameter ratio is 25-40 under temperature 230-250 DEG C of condition, obtains polydiphenyl ether plastics, extrude in treatment step at this, add the carbon fiber that weight percentage is 10-12%.

Described auxiliary agent includes oxidation inhibitor, lubricant and thermo-stabilizer; Described oxidation inhibitor: lubricant: the weight percent of thermo-stabilizer is 1: 2: 2.

The invention has the beneficial effects as follows:

1, by adding vinylbenzene and ultrahigh molecular weight polyethylene(UHMWPE) in plastic component, while improve the intensity of plastics, improve the water resistance of plastics.

2, by doped graphite, carbon fiber and carbon black, the intensity of synthetic plastics is improved, synthetic materials antistatic property significantly promotes simultaneously, particularly adds graphite, improves the flowing property of plastics.

Embodiment

The content of the technical program is described in detail below by way of specific embodiment.

In the present invention, described polyphenylene oxide chemical name is poly-2,6-dimethyl-Isosorbide-5-Nitrae-phenylate, is called for short PPO; The chemical name of described nylon66 fiber is polyhexamethylene adipamide, is called for short PA66.

In this application, what vinylbenzene was selected is polystyrene.

Compatilizer is selected from the PPO-g-MAH that percentage of grafting is 0.8-1.5%, polyphenylene oxide grafted maleic anhydride, by adding compatilizer, enhance the interface compatibility of PPO and PA66, interface between carbon fiber, graphite, carbon black, PPO and PA66 is mixed more, realizes the Homogeneous phase mixing of each component in polydiphenyl ether plastics.

Toughner is selected from the SEBS-g-MAH that percentage of grafting is 0.8-1.5%, SEBS grafted maleic anhydride, improves toughness and over-all properties by doping plasticizing agent in synthetic plastics.

The length of carbon fiber does not limit, and be preferably short carbon fiber, length is 5-10mm, and by doping PPO/PA66 and the plastics adding UHMWPE, the mechanical property of synthetic plastics is significantly improved, has higher physical strength, antistatic effect promotes simultaneously.Carbon black selects existing carbon black can meet the requirement of technical scheme.

Oxidation inhibitor is selected from triglycol two-3-(the 3-tertiary butyl-4 hydroxy-5-methyl base phenyl), and propylene is fine, four [methyl-β-(3,5-di-t-butyl-4 hydroxy phenyl) propionic ester] pentaerythritol ester, one or more combinations in three (2,4-di-tert-butylphenol) phosphorous acid ester.

Lubricant is selected from one or both combinations in tetramethylolmethane stearate or the two stearic amide of ethyl.

Thermo-stabilizer is selected from one or both combinations in zinc oxide or zinc sulphide.

In all compositions of the application, be not particularly illustrated, the equal weight percentage of consumption is calculated.

Embodiment 1

By the PPO of 31%, the PA66 of 20%, the UHMWPE of 3%, the vinylbenzene of 5%, the compatilizer of 10%, the toughner mixing of 10%, stirs; Add the carbon black of 5% and the graphite of 3% again, the auxiliary agent of 1% stirs, and obtains mixture, this mixture being joined length-to-diameter ratio is in the twin screw extruder of 25-40, joins in forcing machine, through melt blending by the carbon fiber of 12%, extruding pelletization, forms polydiphenyl ether plastics.

Embodiment 2

By the PPO of 35%, the PA66 of 18%, the UHMWPE of 5%, the vinylbenzene of 3%, the compatilizer of 10%, the toughner mixing of 10%, stirs; Add the carbon black of 4% again, the graphite of 2%, the auxiliary agent of 1% stirs, obtain mixture, this mixture being joined length-to-diameter ratio is in the twin screw extruder of 25-40, joins in forcing machine by the carbon fiber of 12%, through melt blending, extruding pelletization, forms polydiphenyl ether plastics.

Embodiment 3

By the PPO of 31%, the PA66 of 20%, the UHMWPE of 5%, the vinylbenzene of 5%, the compatilizer of 10%, 10% toughner mixing, stirs; Add the carbon black of 3% again, the graphite of 3%, the auxiliary agent of 1.5% stirs, obtain mixture, this mixture being joined length-to-diameter ratio is in the twin screw extruder of 25-40, joins in forcing machine by the carbon fiber of 11.5%, through melt blending, extruding pelletization, forms polydiphenyl ether plastics.

Claims (2)

1. a polydiphenyl ether plastics preparation method, is characterized in that: comprise the following steps:

First, percentage composition comprises following component by weight: the polyphenylene oxide of 25-35%, the nylon66 fiber of 10-20%, the vinylbenzene of 3-5%, the carbon black of the UHMWPE of 3-5%, 3-5%, the graphite of 2-3%, the compatilizer of 5-10%, the toughner of 5-10%, the auxiliary agent mixing of 0.5-1.5%, obtained mixture;

Secondly, this mixture is extruded process with the screw extrusion press that length-to-diameter ratio is 25-40 under temperature 230-250 DEG C of condition, obtains polydiphenyl ether plastics, extrude in treatment step at this, add the carbon fiber that weight percentage is 10-12%.

2. polydiphenyl ether plastics preparation method according to claim 1, is characterized in that: described auxiliary agent includes oxidation inhibitor, lubricant and thermo-stabilizer; Described oxidation inhibitor: lubricant: the weight percent of thermo-stabilizer is 1: 2: 2.