CN101798459B - Production method of nylon 66/ polycarbonate/ silicon rubber thermostability engineering plastic - Google Patents
Production method of nylon 66/ polycarbonate/ silicon rubber thermostability engineering plastic Download PDFInfo
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- CN101798459B CN101798459B CN2010100230170A CN201010023017A CN101798459B CN 101798459 B CN101798459 B CN 101798459B CN 2010100230170 A CN2010100230170 A CN 2010100230170A CN 201010023017 A CN201010023017 A CN 201010023017A CN 101798459 B CN101798459 B CN 101798459B
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Abstract
The invention discloses a production method of nylon 66/ polycarbonate/ silicon rubber thermostability engineering plastic, comprising the following steps: 1) drying nylon 66 and polycarbonate in a high-performance vacuum dehumidification drier at the temperature of 90 DEG C for 12 hours; and evenly mixing according to the mass ratio that: PA66: PC: silicon rubber: montmorillonoid (OMMT) is equal to 100: (5-10): (1-5): (0-1); and (2) fusing and extruding the mixture by a screw extruder for granulation. The fusion processing temperature is 265-300 DEG C, the rotating speed of the screw is 50-100 r/min, and the retention period of mixture in a double-screw extruder is 120-400 seconds. Compared with the prior art, the invention obtains the engineering plastic with favorable mechanical property and resistance to high temperature.
Description
Technical field
The present invention relates to a kind of manufacture method of thermostability engineering plastic, specifically, relate to a kind of manufacture method of nylon 66/ polycarbonate/silicon rubber thermostability engineering plastic.
Technical background
For general polycarbonate, elastomer composite toughened system, though the mixture comprehensive mechanical property is greatly improved, but still have the compatibility problem of polycarbonate and composite matrix, and because General Purpose Rubber or elastomerics non-refractory, so material thermal resistance is bad.
Silicon rubber provides thinking because of having following performance for addressing the above problem: the use temperature of broad (100 ℃ to+250 ℃); Oxytolerant gas, ozone and illumination; Good not viscosity; Low toxicity; Printing opacity; Excellent electric insulating; Low chemically reactive.
Summary of the invention:
The objective of the invention is to, a kind of engineering plastics that have excellent mechanical performances and thermal property concurrently are provided.
The present inventor adopts the high temperature resistant system of polycarbonate and silicon rubber composite toughening, is that composite matrix is made a kind of thermostability engineering plastic with nylon 66 (hereinafter to be referred as PA66).The screening of the optimum amount by polycarbonate adding (hereinafter to be referred as PC) and silicon rubber and the optimum matching of each component of filling a prescription guarantee that promptly material has good toughness, guarantee the resistance to elevated temperatures that material is superior simultaneously, thereby overcome the defective of prior art.
Concrete technical scheme is as follows:
A kind of manufacture method of nylon 66/ polycarbonate/silicon rubber thermostability engineering plastic may further comprise the steps:
1. nylon 66 and polycarbonate in high-performance vacuum dehumidifying heat pump in 90 ℃ dry 14 hours down, by quality than nylon 66: polycarbonate: silicon rubber: polynite=100: (5-10): (1-5): (0-1) mix;
2. said mixture melt extrudes granulation with screw extrusion press, and melt processing temperature is 265-300 ℃, and screw speed is 50-100 rev/min, and mixture residence time in twin screw extruder is 100-400 second.
Described silicon rubber is a kind of in two component liquid addition-type silicon rubbers or the methyl vinyl silicone rubber.
Described nylon 66: the optimum quality ratio of polycarbonate is 100: 5.
Described nylon 66: the optimum quality ratio of silicon rubber is 100: 4.
Described nylon 66: the optimum quality ratio of polynite is 100: 1.
The most optimal retention time length of described mixture in twin screw extruder is 100-180 second.
As to adopt methyl vinyl silicone rubber, the vulcanizing agent of this silicon rubber be benzoyl peroxide.
Selected polynite is the polynite that organises and handle.
Nylon 66/ polycarbonate/silicon rubber mixture can keep its original shock strength substantially after thermal treatment, and the average softening point temperature of mixture and thermal degradation temperature are respectively near 235 ℃ and about 450 ℃, more common rubber toughened engineering plastics are high a lot, embodied the good thermotolerance of mixture.
Nylon 66/ polycarbonate/methyl vinyl silicone rubber mixture, the add-on of vulcanizing agent are that the present technique field is known, and its consumption and proportioning are also basic identical with prior art.The vulcanizing agent of methyl vinyl silicone rubber is preferably benzoyl peroxide among the present invention.
Silicon rubber behind the dynamic vulcanization, is cross-linked to form the plan reticulated structure of similar semi-IPN in the PA66/PC matrix.As shown in Figure 1, be transmission electron microscope (TEM) photo of PA66/PC/ silicone rubber compound (5#), wherein luminous drop is silicone rubber particles, and the distribution of silicone rubber particles is by sulfuration or is cross-linked to form in the thermoplasticity organic phase, and forms a stable shape form.This structure helps strengthening the interaction between PA66 matrix and the PC, and makes the PC particle closely be embedded in the PA66 matrix.Silicone rubber crosslinking closely is fixed on polycarbonate pellets in nylon 66 matrixes just as intermeshing rope in the PA66 matrix.The PA66/PC/ silicone rubber compound is when running into external shock, and the plan reticulated structure that silicon rubber is cross-linked to form in the PA66/PC matrix is transferred to impact energy in the silicone rubber particles, and these particles can absorb impact energy to greatest extent.Simultaneously, can provide enough rigidity for mixture by intending reticulated structure institute fixed polycarbonate pellets.Therefore, because this synergistic effect we can say that silicon rubber and polycarbonate composite toughening system are the ideal toughened systems.
Because composite matrix nylon 66 is own high temperature resistant, polycarbonate also can be given more superior impact resistance after the material heat treatment, polycarbonate in simultaneously certain ratio range also can not influence the softening point temperature of material, add the characteristics of silicon rubber, make the novel material among the present invention also have very outstanding high temperature resistance by the synergistic effect of three kinds of compositions under certain proportioning as high-temperature resistant rubber toughner.
Add the modulus that organo montmorillonite can further improve material in the mixture, and aspect thermal characteristics, improve the thermal degradation temperature of material.
Description of drawings:
Fig. 1 is transmission electron microscope (TEM) photo of PA66/PC/ silicone rubber compound (5#).
Fig. 2 is the shock strength comparison diagram before and after the thermal treatment of different composite thing.
Fig. 3 is the softening point temperature comparison diagram of nylon 66/ polycarbonate/silicon rubber mixture.
Embodiment:
Performance test condition in an embodiment and/or standard are as follows:
Tensile property is tested by the omnipotent mechanical test experimental machine of SANS microcomputer control that the Shenzhen Sans Material Detection Co., Ltd produces, and standard adopts ISO 527-2:1993, and draw speed is 50mm/min.
Bending property also is to be tested by the omnipotent mechanical test experimental machine of SANS microcomputer control that the Shenzhen Sans Material Detection Co., Ltd produces, and standard adopts ISO 178:1993.
Notched Izod impact strength is tested by the UJ-40 type shock-testing machine that Chinese Chengde City, Hebei Province material experiment-machine factory produces, and standard adopts ISO 179-1982.
Thermal treatment is to carry out in the air aging stove according to ISO 188-1998, dries by the fire 6 hours in 8 hours and 180 ℃ 140 ℃ of bakings respectively.Last working sample also obtains mean values.
Vicat softening point temperature is to record according to (Tanhor testing tool company limited, Jilin Province) on the ISO 306-1994 utilization XRW-300 vicat softening point temperature tester.
Thermogravimetic analysis (TGA) is to be that (TA records on thermal gravimetric analyzer US) SDT Q600 in model.These tests be 7 milligrams sample under nitrogen gas stream 50mL/min atmosphere, 10 ℃/min of heating rate is heated to 600 ℃ and records.
[embodiment 2-5]
Before mixing, nylon 6 and polycarbonate all will be under 90 ℃ of vacuum conditions dry 14 hours, polynite in 80 ℃ of air circulation ovens dry 4 hours.Nylon 6/ polycarbonate/silicon rubber mixture is that dynamic vulcanization makes in parallel dual-screw extruding machine.Barrel temperature is between 270-285 ℃, and rotating speed is between 60-90rpm.Extrude back cooling and beginning granulation in water bath.The prescription of nylon 66/ polycarbonate/silicon rubber mixture sees Table 1.
Injection moulding is subsequently carried out in the injection molding machine, and injection temperature is 275 ℃.Injection moulding speed and pressure are respectively 11.5cm
3/ s and 2300bar.Gained composite toughening nylon 66 engineering plastics carry out performance test, the results are shown in Table 2, Fig. 2 and Fig. 3.
[comparative example 1#, 6#, 7#]
Nylon 66, polycarbonate, methyl vinyl silicone rubber, POE elastomerics (multipolymer of ethene and octene) is even according to the described mixed of table 1.
Said mixture melt extrudes granulation with twin screw extruder, and technology is the same.
The proportioning raw materials of table 1. composite sample (wt%)
The mechanical property of table 2. different composite matter sample and thermal characteristics are relatively
Only for the preferred embodiment of invention, be not to be used for limiting practical range of the present invention in sum.Be that all equivalences of doing according to the content of the present patent application claim change and modification, all should be technology category of the present invention.
Claims (7)
1. the manufacture method of nylon 66/ polycarbonate/silicon rubber thermostability engineering plastic is characterized in that, this method may further comprise the steps:
1. nylon 66 and polycarbonate in high-performance vacuum dehumidifying heat pump in 90 ℃ dry 14 hours down, by quality than nylon 66: polycarbonate: silicon rubber: polynite=100: (5-10): (1-5): (0-1) mix;
2. said mixture melt extrudes granulation with screw extrusion press, and melt processing temperature is 265-300 ℃, and screw speed is 50-100 rev/min, and mixture residence time in twin screw extruder is 100-400 second;
Described silicon rubber is a kind of in two component liquid addition-type silicon rubbers or the methyl vinyl silicone rubber.
2. the manufacture method of nylon 66/ polycarbonate/silicon rubber thermostability engineering plastic according to claim 1 is characterized in that the 1. described nylon 66 of step: polycarbonate=100: 5.
3. the manufacture method of nylon 66/ polycarbonate/silicon rubber thermostability engineering plastic according to claim 1 is characterized in that the 1. described nylon 66 of step: silicon rubber=100: 4.
4. the manufacture method of nylon 66/ polycarbonate/silicon rubber thermostability engineering plastic according to claim 1 is characterized in that the 1. described nylon 66 of step: polynite=100: 1.
5. the manufacture method of nylon 66/ polycarbonate/silicon rubber thermostability engineering plastic according to claim 1 is characterized in that the 2. described residence time of mixture in twin screw extruder of step is 100-180 second.
6. the manufacture method of nylon 66/ polycarbonate/silicon rubber thermostability engineering plastic according to claim 1, the vulcanizing agent that it is characterized in that methyl vinyl silicone rubber is a benzoyl peroxide.
7. according to the manufacture method of arbitrary described nylon 66/ polycarbonate/silicon rubber thermostability engineering plastic in the claim 1 to 6, it is characterized in that selected polynite is the polynite that organises and handle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100230170A CN101798459B (en) | 2010-01-20 | 2010-01-20 | Production method of nylon 66/ polycarbonate/ silicon rubber thermostability engineering plastic |
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| CN2010100230170A CN101798459B (en) | 2010-01-20 | 2010-01-20 | Production method of nylon 66/ polycarbonate/ silicon rubber thermostability engineering plastic |
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| CN101798459A CN101798459A (en) | 2010-08-11 |
| CN101798459B true CN101798459B (en) | 2011-10-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103725013A (en) * | 2013-12-16 | 2014-04-16 | 芜湖万润机械有限责任公司 | Nylon mixed silica gel material for automobile damping |
| RU2607412C1 (en) * | 2015-11-18 | 2017-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный технический университет имени Н.Э. Баумана" (МГТУ им. Н.Э. Баумана) | Heat-resistant polymer composite material based on siloxane rubber and method for production thereof |
| CN106398160A (en) * | 2016-09-29 | 2017-02-15 | 芜湖豫新世通汽车空调有限公司 | PC/PVAL automobile air conditioner air-blowing casing and preparation method thereof |
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Granted publication date: 20111005 Termination date: 20170120 |