CN109852024A - A kind of Novel foaming light diffusion PC material and preparation method thereof - Google Patents
A kind of Novel foaming light diffusion PC material and preparation method thereof Download PDFInfo
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- CN109852024A CN109852024A CN201811557097.0A CN201811557097A CN109852024A CN 109852024 A CN109852024 A CN 109852024A CN 201811557097 A CN201811557097 A CN 201811557097A CN 109852024 A CN109852024 A CN 109852024A
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- light diffusion
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Abstract
The invention belongs to thermoplastic macromolecule material technical fields, specifically disclose a kind of Novel foaming light diffusion PC material and preparation method thereof, the foaming light spreads PC material, the component including following parts by weight: 40~60 parts of polycarbonate, 0.5~1.5 part of foaming agent, 3~15 parts of compatilizer, 0.2~1 part of chain extender, 0.5~1 part of antioxidant, 0.2~1 part of lubricant.Foaming light diffusion PC material of the invention is mainly dry by component, mix and the processing step of injection molding is prepared, its foaming light diffusion PC material obtained has excellent light diffusing energy and shock resistance, the dust emission that foaming light diffusion PC material generates during the preparation process is reduced, and then reduces its harm to human body and environment.
Description
Technical field
The invention belongs to thermoplastic macromolecule material technical field, in particular to a kind of Novel foaming light diffusion PC material and
Preparation method.
Background technique
Polycarbonate (Polycarbonate, abbreviation PC) is a kind of macromolecule chemical combination in strand containing carbonic ester
The general name of object, and be usually to be reacted by polyphenol such as bisphenol-A (BPA) with phosgene (phosgene).Polycarbonate
With many desired properties, such as thermal stability, good electrical property and higher impact strength, this make it in business and
There is biggish application value in industry.
In order to increase the light diffusing energy of PC, usually all spread added with light currently used for the PC material in lighting apparatus
Agent obtains the modification PC material with certain light diffusing energy after using physical mixed method that PC material is blended with light diffusing agent
Material.However, in practical mixed process, the poor compatibility of light diffusing agent and PC material, in addition, when light diffusing agent is added to PC material
After in material, the shock resistance of modified PC material obtained can then decline to a great extent, while light expands modification PC during the preparation process
Powder is easy fugitive dust, and then can endanger the body of operating personnel.
Summary of the invention
In view of the deficienciess of the prior art, the first purpose of this invention is to provide a kind of Novel foaming light diffusion PC
Material uses foaming agent production foaming PC, and abscess is uniform and expansion density is controllable, uses chain extender and compatible at the same time
Agent also has excellent impact resistance so that foaming light obtained diffusion PC material not only has excellent light diffusing.
Second object of the present invention is to provide a kind of preparation method of Novel foaming light diffusion PC material, made from
The light diffusion PC material that foams has good light diffusing and impact resistance.
To realize above-mentioned first purpose, the present invention provides the following technical scheme that
A kind of Novel foaming light diffusion PC material, the component including following parts by weight:
By using above-mentioned technical proposal, the present invention forms uniform abscess using foaming agent in polycarbonate, so that
There are a certain number of reflection cambered surfaces between polycarbonate molecule, light exposes to the folding that different angle occurs in reflection cambered surface
It penetrates, and then achievees the effect that diffusing light, traditional light diffusing agent is replaced with this, in case it is prepared by foaming light diffusion PC material
More fugitive dust is generated in journey because using light diffusing agent, and then reduces the harm to human body and environment；
Wherein, foaming agent can be uniformly scattered in polycarbonate molecule under the action of compatilizer and lubricant, in addition by
The strand of polycarbonate can be promoted to spread in the addition of chain extender to extend, consequently facilitating the solidified forming of polycarbonate, makes
It obtains polycarbonate and is capable of forming complete polymer network, relative to short-chain structure, polycarbonate of the invention has good
Structural stability, and then the shock resistance of polycarbonate can be effectively improved；At the same time, network-like polycarbonate molecule
Preferably the foaming agent after evenly dispersed can effectively be locked, the abscess thus generated is more uniform, to effectively mention
The high light diffusing of polycarbonate；
Since foaming agent usually has certain surface-active, the addition of antioxidant can be prepared on the one hand in polycarbonate
The oxidation of foaming agent is inhibited in journey, guarantees the stability of foaming agent, on the other hand can improve and prepare resulting foaming
Light spreads the antioxygenic property of PC material, and extend foaming light diffusion PC material uses the time；
To sum up, foaming light diffusion PC material produced by the present invention has good light diffusing, impact resistance and inoxidizability.
Further, the foaming agent is the foaming agent with core-shell structure, using PMMA as outside in the core-shell structure
Shell, using nano carbon particle as kernel.
By using above-mentioned technical proposal, PMMA is polymethyl methacrylate, and fusing point is higher than the molten of polycarbonate
Point, thus shell of the PMMA as foaming agent is used, nano carbon particle can be preferably protected, so that nano carbon particle is uniformly dispersed
It foams again afterwards.The compatibility of PMMA and polycarbonate is stronger simultaneously, is conducive to foaming agent and is uniformly blended in polycarbonate
In, to improve the uniformity coefficient of distribution of cells；
Nano carbon particle can be reacted with oxygen generates carbon dioxide, in conjunction with injection molding machine mesolow state, so that carbon dioxide is from poly-
It is precipitated in carbonic ester system, forms uniform abscess during being molded cooling, the foaming of polycarbonate is completed with this.Its
Carbon dioxide of generation itself thereby reduces the production of polycarbonate toxic gas during the preparation process without penetrating odor
It is raw；In addition carbon dioxide stability is strong, physical-chemical reaction does not occur with polycarbonate and other components, so that molding abscess
Uniform pore diameter, guarantee the good light diffusing of polycarbonate.
Further, the compatilizer is maleic anhydride graft compatilizer.
By using above-mentioned technical proposal, maleic anhydride graft compatilizer, which passes through, introduces strongly polar reactive group, with
The compatibility of polycarbonate is preferable, while having a large amount of flexible group to improve the toughness of polycarbonate, is a kind of macromolecule
Interface coupling agent, compatilizer, dispersion enhancing agents and toughener, thus, it is possible to promote foaming agent to be preferably scattered in polycarbonate
In, while chain extender can be promoted quickly and effectively to lengthen to the strand of polycarbonate, so that foaming light obtained expands
Dissipating PC material has good light diffusing energy and shock resistance.
Further, the chain extender is isocyanide ester derivative.
By using above-mentioned technical proposal, isocyanide ester base (- N=C=O) is all had in isocyanide ester derivative, this is different
Nitrile perester radical is the unsaturated active group of height, higher with the reactivity of the compatilizer with active hydrogen, especially
It can act synergistically with maleic anhydride graft compatilizer, quickly increase the chain length of polycarbonate；In addition to this, isocyanide ester
Or a kind of important organic synthesis intermediate, preparation is convenient, with this convenient acquisition to the component, has good practical
Property.
Further, the lubricant is a kind of in calcium stearate, ethylene bis stearamide and pentaerythritol stearate.
By using above-mentioned technical proposal, calcium stearate, ethylene bis stearamide and pentaerythritol stearate are white
The solid-state like lubricant of color can reduce its influence to the color of foaming light diffusion PC material with this, evenly dispersed convenient for its
Between each substance, relative to liquid lubricant, it can reduce and hardened phenomenon occur；In addition, its all have it is excellent
Heat-resisting quantity, in order to avoid its possibility for degrading in injection moulding process.
To realize above-mentioned second purpose, the present invention provides the following technical scheme that a kind of Novel foaming light spreads PC material
The preparation method of material, comprising the following steps:
1., each component is weighed by the parts by weight of setting, and weighed component is dried；
2., each component after drying process be put into high-speed mixer be sufficiently mixed, obtain mixture；
3., the mixture that 2. obtains step be added in the hopper of injection molding machine, obtain foaming light diffusion PC material through injection molding
Material.
By using above-mentioned technical proposal, drying first is subject to each component, in order to avoid component, which exists, deliquesces phenomenon, guarantees component
The excellent performance of itself；Then the component after drying is mixed again, can be molded between each component is made with this
It is preceding to be uniformly mixed, guarantee preferably play practical function between each component, it is easy to operate, so that foaming light obtained expands
Dissipating PC material has good light diffusing energy and shock resistance.
Further, step 2. in, injection molding machine use process conditions are as follows: 240-260 DEG C of an area, two 260-280 DEG C of areas,
Three 260-280 DEG C of areas, four 260-280 DEG C of areas, five 260-280 DEG C of areas.
By using above-mentioned technical proposal, by lot of experiment validation, when the process conditions of injection molding machine be arranged to it is above-mentioned
When temperature, each component can be sufficiently mixed under the above conditions, so that the light diffusion of the foaming light diffusion PC material of its preparation
Property and shock resistance are optimal.
Further, step 2. in, the injection pressure of injection molding machine is 50-80MPa.
Further, step 2. in, the injection speed of injection molding machine is 40-60mm/s.
By using above-mentioned technical proposal, by lot of experiment validation, when the injection pressure of injection molding machine is 50-80MPa, note
When firing rate degree is 40-60mm/s, the injection molding liquid of melting can be preferably filled in injection mold, and foaming light diffusion is effectively reduced
The defect rate of PC material.
Further, step 2. in, the dwell pressure of injection molding machine is 40-70MPa, dwell time 5-10s.
By using above-mentioned technical proposal, by lot of experiment validation, when the dwell pressure of injection molding machine is 40-70MPa, guarantor
When the pressure time is 5-10s, the abscess in foaming light diffusion PC material is able to maintain in stable state, so that the dispersion of uniform foam cell,
To guarantee the excellent light diffusing energy of foaming light diffusion PC material.
In conclusion the invention has the following advantages:
1, the present invention substitutes the use of light diffusing agent using foaming agent, in conjunction with the setting of compatilizer and chain extender, so that poly- carbon
Acid esters has excellent light diffusing energy and shock resistance, reduces what foaming light diffusion PC material generated during the preparation process
Dust emission, and then reduce its harm to human body and environment；
2, foaming agent has core-shell structure in the present invention, with this foaming agent is can be uniformly dispersed in polycarbonate, to mention
The high uniformity coefficient of distribution of cells, guarantees the good light diffusing of polycarbonate；
3, compatilizer is maleic anhydride graft compatilizer in the present invention, chain extender is isocyanide ester derivative, can be assisted
Same-action quicklys increase the chain length of polycarbonate, specific to have good practicability simultaneously；
4, the present invention prepares foaming light diffusion PC material by way of component drying, mixing and injection molding, and operation is simple
It is single, enable foaming light diffusion PC material that there is good light diffusing and shock resistance.
Detailed description of the invention
Fig. 1 is the process flow chart for preparing Novel foaming light diffusion PC material.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
1, the preparation of foaming agent
1.1 throw nano carbon particle in the NaOH aqueous solution that people's mass fraction is 10%, drain, reuse after stirring and washing 5min
Deionized water is rinsed 3 times, makes the surface of nano carbon particle in alkalescent, is drained to be put into after deionized water and is built-in with anhydrous sodium sulfate
Drying box in dry to its water content be 3%, for use；
1.2 into PMMA be added nano silica as activating agent, the decentralized processing 5h in ultrasonic oscillator；
Intelligent temperature control dual-frequency ultrasonic wave abstraction instrument is added with PMMA after treatment in 1.3 nano carbon particle after over cleaning
In, and deionized water, initiator A IBN, dispersing agent propylene glycol block polyether F68 is added, it is carried out under conditions of 400W/3.0h
Polymerization reaction, low-temperature vacuum drying obtains C-PMMA core-shell structure foaming agent after reaction.
2, embodiment
2.1, embodiment 1
A kind of preparation method of Novel foaming light diffusion PC material, in conjunction with Fig. 1, comprising the following steps:
1., the PP-g-MAH compatilizer of the C-PMMA core-shell structure foaming agent of the polycarbonate that weighs 40kg, 0.5kg, 3kg,
Ethyl alcohol end-sealed type isocyanide ester chain extender, the antioxidant 1010 of 0.5kg and the calcium stearate of 0.2kg of 0.2kg, and will be weighed
Group is placed in drying box, in 50 DEG C of dry 4h；
2., by step 1. in be dried after each component be put into high-speed mixer, stirred under the revolving speed of 700r/min
10min obtains mixture so that each component is sufficiently mixed；
3., the mixture that 2. obtains step be added in the hopper of injection molding machine, obtain foaming light diffusion PC material through injection molding
Material；Wherein, the process conditions that injection molding machine uses are as follows: 240 DEG C of an area, two 260 DEG C of areas, three 260 DEG C of areas, four 260 DEG C of areas, 5th area
260 DEG C, injection pressure 50MPa, injection speed 40mm/s, dwell pressure 40MPa, dwell time 5s.
2.2, embodiment 2- embodiment 11
Embodiment 2- embodiment 11 on the basis of the method for embodiment 1, adjusts the weight of its component and component,
The comparison of specific adjustment situation and embodiment 1 is referring to following table one, unit kg.
Table one
2.3, embodiment 12- embodiment 18
Embodiment 12- embodiment 18 on the basis of the method for embodiment 1, adjusts the technological parameter of injection molding machine, tool
Body adjusts the comparison of situation and embodiment 1 referring to following table two.
Table two
3, comparative example
3.1, comparative example 1
The difference is that, foaming agent is changed to light diffusing agent XB-150 in this comparative example with embodiment.
3.2, comparative example 2
The difference is that, compatilizer is not added in this comparative example with embodiment.
3.3, comparative example 3
The difference is that, chain extender is not added in this comparative example with embodiment.
3.4, comparative example 4
The difference is that, antioxidant is not added in this comparative example with embodiment.
4, performance test
Embodiment 1- embodiment 18 and comparative example 1- comparative example 4 are subjected to following performance test:
Light transmittance: it is measured according to the examination criteria of GB2410-80；
Mist degree: it is measured according to the examination criteria of GB2410-80；
Shock resistance: it is measured according to the examination criteria of ASTM D256；780J/m
Heat aging performance: being measured according to the examination criteria of ASTM G154, and test condition is 80 DEG C, 1000h；
Cryogenic property: being measured according to the examination criteria of ASTM G154, and test condition is -15 DEG C, 10h.
5, test result and analysis
Test result such as following table three.
Table three
Ginseng sees the above table three, and embodiment 1 is compared with the testing result of comparative example 1, available, and the present invention is using hair
Infusion foaming light diffusion PC material obtained have better light transmittance, haze value, impact strength and high temperature oxidation resisting and
Low-temperature oxidation ability, therefore the present invention has excellent light diffusing energy, shock resistance and antioxygenic property.
Embodiment 1 is compared with the testing result of comparative example 2 and comparative example 3, available, compatilizer in the present invention
Add light transmittance, haze value and the impact strength that can be effectively improved foaming light diffusion PC material simultaneously with chain extender, because
This foaming light diffusion PC material of the invention has more excellent light diffusing energy and impact strength.
Embodiment 1 is compared with the testing result of comparative example 4, it is available, antioxidant is added not only in the present invention
The high temperature oxidation resisting of foaming light diffusion PC material and the performance of low temperature resistant oxidation can be improved, moreover it is possible to improve hair to a certain extent
Light transmittance, mist degree and the impact strength of light diffusion PC material are steeped, so that foaming light diffusion PC material is with more excellent
Light diffusing energy and shock resistance.
Embodiment 1 is compared with the testing result of embodiment 4, it is available, it is foamed using C-PMMA core-shell structure
Agent has better light diffusing energy and impact strength than other foaming agents, foaming light diffusion PC material obtained.
Embodiment 1 is compared with the testing result of embodiment 5 and embodiment 6, it is available, it is connect using maleic anhydride
Branch compatilizer compares other compatilizers, and foaming light diffusion PC material obtained has better light diffusing energy and shock resistance strong
Degree.
Embodiment 1 is compared with the testing result of embodiment 7, it is available, using isocyanide ester derivative conduct
Chain extender has better impact strength than other chain extenders, foaming light diffusion PC material obtained.
Embodiment 1 is compared with the testing result of embodiment 8- embodiment 11, it is available, using calcium stearate,
One of ethylene bis stearamide and pentaerythritol stearate are as lubricant than other lubricants, foaming obtained
Light, which spreads PC material, has better impact strength.
Embodiment 1 is compared with the testing result of embodiment 12- embodiment 18, it is available, when the work of injection molding machine
Skill condition setting is 240-260 DEG C of an area, 260-280 DEG C of 2nd area, 260-280 DEG C of 3rd area, 260-280 DEG C of 4th area, five area 260-
280 DEG C, injection pressure 50-80MPa, injection speed 40-60mm/s, dwell pressure 40-70MPa, dwell time 5-
When 10s, foaming light diffusion PC material obtained has better light diffusing energy and impact strength.
To sum up, foaming light diffusion PC material produced by the present invention uses foaming agent adding instead of traditional light diffusing agent
Add, there is good light diffusing energy, shock resistance and antioxygenic property, while reducing the dirt to human body and environment
Dye, has the characteristics that environmental protection and energy saving.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of Novel foaming light spreads PC material, which is characterized in that the component including following parts by weight:
2. a kind of Novel foaming light according to claim 1 spreads PC material, which is characterized in that the foaming agent be with
The foaming agent of core-shell structure, using PMMA as shell in the core-shell structure, using nano carbon particle as kernel.
3. a kind of Novel foaming light according to claim 1 spreads PC material, which is characterized in that the compatilizer is Malaysia
Acid anhydrides is grafted compatilizer.
4. a kind of Novel foaming light according to claim 1 spreads PC material, which is characterized in that contain in the chain extender
Isocyanide ester group.
5. a kind of Novel foaming light according to claim 1 spreads PC material, which is characterized in that the lubricant is tristearin
It is a kind of in sour calcium, ethylene bis stearamide and pentaerythritol stearate.
6. a kind of preparation method of Novel foaming light diffusion PC material, feature described in any one of claim 1-5 exist
In, comprising the following steps:
Each component is weighed by the parts by weight of setting, and weighed component is dried；
Each component after drying process is put into high-speed mixer and is sufficiently mixed, mixture is obtained；
2. mixture that step is obtained is added in the hopper of injection molding machine, obtains foaming light diffusion PC material through injection molding.
7. a kind of preparation method of Novel foaming light diffusion PC material according to claim 6, which is characterized in that step is 2.
In, the process conditions of injection molding machine use are as follows: 240-260 DEG C of an area, two 260-280 DEG C of areas, three 260-280 DEG C of areas, four area 260-
280 DEG C, five 260-280 DEG C of areas.
8. a kind of preparation method of Novel foaming light diffusion PC material according to claim 6, which is characterized in that step is 2.
In, the injection pressure of injection molding machine is 50-80MPa.
9. a kind of preparation method of Novel foaming light diffusion PC material according to claim 6, which is characterized in that step is 2.
In, the injection speed of injection molding machine is 40-60mm/s.
10. a kind of preparation method of Novel foaming light diffusion PC material according to claim 6, which is characterized in that step
2. in, the dwell pressure of injection molding machine is 40-70MPa, dwell time 5-10s.
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Cited By (2)
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| CN113352536A (en) * | 2021-06-16 | 2021-09-07 | 宁波浙铁大风化工有限公司 | Foaming light diffusion material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112389057A (en) * | 2020-10-28 | 2021-02-23 | 合肥华聚微科新材料有限责任公司 | Novel optical diffusion material with multilayer composite microporous structure for flat panel display |
| CN113352536A (en) * | 2021-06-16 | 2021-09-07 | 宁波浙铁大风化工有限公司 | Foaming light diffusion material and preparation method thereof |
| CN113352536B (en) * | 2021-06-16 | 2022-08-16 | 宁波浙铁大风化工有限公司 | Foaming light diffusion material and preparation method thereof |
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