CN104277447A - Synthetic plastic and preparation method thereof - Google Patents

Abstract

The invention relates to a synthetic plastic and a preparation method thereof. The synthetic plastic comprises the following components in percentage by weight: 25%-35% of polyphenylether, 25%-35% of nylon 66, 3%-5% of UHMWPE, 15%-25% of carbon fibers, 8%-12% of carbon black, 5%-10% of a compatilizer, 5%-10% of a toughening agent and 0.5%-1.5% of auxiliary agents.

Description

A kind of synthetic plastics and preparation method thereof

Technical field

The invention belongs to polymeric material field, refer to a kind of synthetic plastics and preparation method thereof 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 synthetic 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 synthetic plastics, percentage composition comprises following component by weight: the polyphenylene oxide of 25-35%, the nylon66 fiber of 25-35%, the carbon fiber of the UHMWPE of 3-5%, 15-25%, the carbon black of 8-12%, the compatilizer of 5-10%, the toughner of 5-10%, the auxiliary agent of 0.5-1.5%.

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

A preparation method for synthetic plastics, comprises the following steps:

First, following component will be comprised by percentage composition by weight: the polyphenylene oxide of 25-35%, the nylon66 fiber of 25-35%, the carbon black of the UHMWPE of 3-5%, 8-12%, 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 synthetic plastics, extrude in treatment step at this, add the carbon fiber that weight percentage is 15-25%.

The invention has the beneficial effects as follows:

By doping carbon fiber and carbon black, the intensity of synthetic plastics is improved, synthetic materials antistatic property significantly promotes simultaneously.

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.

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, carbon black, PPO and PA66 is mixed more, realizes the Homogeneous phase mixing of each component in PPO/PA66 synthetic 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, by doping PPO/PA66 and the synthetic 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 25%, the PA66 of 35%, the UHMWPE of 3%, the compatilizer of 6%, the toughner mixing of 5%, stirs; Add the carbon black of 8% again, the auxiliary agent of 1% stirs, and obtains mixture, and 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 17%, and through melt blending, extruding pelletization, forms synthetic plastics.

Embodiment 2

By the PPO of 35%, the PA66 of 25%, the UHMWPE of 5%, the compatilizer of 6%, the toughner mixing of 5%, stirs; Add the carbon black of 8% again, the auxiliary agent of 1% stirs, and obtains mixture, and 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 15%, and through melt blending, extruding pelletization, forms synthetic plastics.

Embodiment 3

By the PPO of 30%, the PA66 of 30%, the UHMWPE of 4%, the compatilizer of 6%, 5% toughner mixing, stirs; Add the carbon black of 9% again, the auxiliary agent of 1% stirs, and obtains mixture, and 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 15%, and through melt blending, extruding pelletization, forms synthetic plastics.

Claims (3)

1. a synthetic plastics, is characterized in that: percentage composition comprises following component by weight: the polyphenylene oxide of 25-35%, the nylon66 fiber of 25-35%, the carbon fiber of the UHMWPE of 3-5%, 15-25%, the carbon black of 8-12%, the compatilizer of 5-10%, the toughner of 5-10%, the auxiliary agent of 0.5-1.5%.

2. synthetic plastics 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.

3. a preparation method for synthetic plastics, is characterized in that: comprise the following steps:

First, following component will be comprised by percentage composition by weight: the polyphenylene oxide of 25-35%, the nylon66 fiber of 25-35%, the carbon black of the UHMWPE of 3-5%, 8-12%, 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 PPO/PA66 synthetic plastics, extrude in treatment step at this, add the carbon fiber that weight percentage is 15-25%.