CN114933670A - Formula and preparation method of low-water-absorption organic glass - Google Patents
Formula and preparation method of low-water-absorption organic glass Download PDFInfo
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- CN114933670A CN114933670A CN202210542084.6A CN202210542084A CN114933670A CN 114933670 A CN114933670 A CN 114933670A CN 202210542084 A CN202210542084 A CN 202210542084A CN 114933670 A CN114933670 A CN 114933670A
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- organic glass
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
- C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/249—Glazing, e.g. vacuum glazing
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The application relates to a formula of organic glass with low water absorption and a preparation method thereof. The formula comprises the following components in percentage by weight: 90% -95% of monomers; 4.9 to 10 percent of modifier; 0.1% -1% of initiator. The preparation method comprises the following steps: (a) weighing the raw materials according to the formula; (b) mixing and stirring a monomer and a modifier to obtain a first transparent liquid; (c) adding an initiator into the first transparent liquid, and stirring to obtain a second transparent liquid; (d) pouring the second transparent liquid into the mold, and curing; (e) and cooling and demolding to obtain the organic glass with low water absorption. The organic glass with low water absorption rate prepared by the method can greatly reduce the water absorption rate of the organic glass, and retains the advantages of high transmittance, high hardness and the like of the organic glass.
Description
Technical Field
The application relates to organic glass, in particular to a formula of organic glass with low water absorption and a preparation method thereof.
Background
Organic glass is a popular name, abbreviated PMMA. The chemical name of the high molecular transparent material is polymethyl methacrylate, which is a high molecular compound polymerized by methyl methacrylate. The organic glass has the best light transmission in plastics, and can transmit more than 92% of sunlight, and the ultraviolet reaches 73.5%; and has good acid and alkali resistance, dimensional stability, insulativity, good thermoplastic processability and the like, is easy to process and form, and is widely applied to the aspects of buildings, cultural and educational science, navigation, aviation, daily life and the like. However, organic glass also has the disadvantages of poor heat resistance and weather resistance, poor organic solvent resistance, high water absorption, easy scratching, easy generation of silver streaks and the like.
PMMA is a typical amorphous polymer material, the solvent resistance of PMMA is improved, the molecular weight of PMMA can only be increased from a physical point of view, and the higher the molecular weight is, the stronger the solvent resistance is. According to the principle, on the premise of keeping the original performance, particularly the transparency, of the organic glass, the organic solvent resistance and the water absorption of the organic glass are improved by adopting methods of introducing a bulky group on a PMMA main chain, introducing a cyclic structure on the PMMA main chain, adding a cross-linking agent and the like.
Therefore, the improvement of the water absorption of the organic glass becomes a problem to be solved urgently for large-area popularization and use of the organic glass.
Disclosure of Invention
In order to solve the technical problems in the prior art, the embodiment of the application provides a formula of organic glass with low water absorption and a preparation method thereof. The specific technical scheme is as follows:
in a first aspect, a formula of organic glass with low water absorption is provided, which comprises the following components in percentage by weight: 90% -95% of monomers; 4.9 to 10 percent of modifier; 0.1% -1% of initiator.
In a second possible implementation of the first aspect, the monomer uses methyl methacrylate.
In a third possible implementation form of the first aspect, the modifier comprises one or more of triallyl cyanurate, neopentyl glycol diheptanoate, polyimide, methacrylamide.
In a fourth possible implementation of the first aspect, the initiator uses azobisisobutyronitrile.
In a second aspect, a preparation method of organic glass with low water absorption rate is provided, which comprises the following steps: (a) weighing the raw materials according to the formula of the low-water-absorption organic glass in any one of the first aspect; (b) mixing and stirring a monomer and a modifier to obtain a first transparent liquid; (c) adding an initiator into the first transparent liquid, and stirring to obtain a second transparent liquid; (d) pouring the second transparent liquid into the mold, and curing; (e) and cooling and demolding to obtain the organic glass with low water absorption.
In a first possible implementation manner of the second aspect, in the step (b), the monomer is added into the reaction kettle and stirred, then the initiator is added into the reaction kettle, and the mixture is heated and stirred to obtain the first transparent liquid.
In combination with the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the temperature of the heating and stirring is 45 ℃ to 65 ℃.
With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, in the step (c), after the temperature of the first transparent liquid is reduced to below 35 ℃, the initiator is added into the reaction kettle.
In a fourth possible implementation manner of the second aspect, in the step (d), the mold is firstly placed at 50-60 ℃ to be cured for 15-20 h, and then the mold is placed at 110-130 ℃ to be cured for 4-8 h during the curing treatment.
In a fifth possible implementation of the second aspect, the size of the die is 600 × 10 mm.
Compared with the prior art, the application has the advantages that:
according to the formula and the preparation method of the organic glass with low water absorption, the prepared organic glass with low water absorption can greatly reduce the water absorption of the organic glass, and the advantages of high transmittance, high hardness and the like of the organic glass are kept.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flow chart of the steps of a method for preparing a low water absorption organic glass according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Please refer to fig. 1, which is a flowchart illustrating steps of a method for manufacturing a low water absorption organic glass according to an embodiment of the present application. As shown in the figure, the preparation method S of the low water absorption organic glass includes the following steps S1 to S5. First, in step S1, raw materials are weighed. According to the weight percentage of the components of the formula, 90 to 95 percent of monomer, 4.9 to 10 percent of modifier and 0.1 to 1 percent of initiator are respectively weighed. In the embodiment, methyl methacrylate is used as the monomer, one or more of triallyl cyanurate, neopentyl glycol diheptanoate, polyimide and methacrylamide are used as the modifier, and azobisisobutyronitrile is used as the initiator.
Then, in step S2, the monomer is mixed with the modifier. The monomer and the modifier are mixed and stirred to obtain a first transparent liquid. Specifically, the monomer is added into a reaction kettle, stirring is started at normal temperature, then the modifier is added into the reaction kettle, and the mixture is heated and stirred at 45-65 ℃ until the mixture is clear and transparent, so that a first transparent liquid is obtained. Next, in step S3, an initiator is added. And adding an initiator into the first transparent liquid, and stirring to obtain a second transparent liquid. Specifically, after the temperature of the first transparent liquid is reduced to below 35 ℃, the initiator is added into the reaction kettle, and the second transparent liquid is obtained through stirring.
Then, in step S4, the second transparent liquid is cast and cured. And pouring the second transparent liquid into the mold, and curing. Specifically, the second transparent liquid is poured into a 600 x 10mm mould, the mould is firstly placed in an explosion-proof oven to be cured for 15h-20h at 50-60 ℃, and then the mould is placed in an explosion-proof oven to be cured for 4h-8h at 110-130 ℃. Finally, in step S5, the mold is removed. And cooling and demolding to obtain the organic glass with low water absorption.
The following will illustrate the beneficial effects of the formula of the organic glass with low water absorption rate and the preparation method thereof in combination with specific examples and comparative examples.
Example 1
Step 1, weighing raw materials: weighing the following components in percentage by weight: 93% of methyl methacrylate; 3% of polyimide, 3.5% of methacrylamide; 0.5% azobisisobutyronitrile.
Step 2, firstly adding methyl methacrylate into a reaction kettle, starting stirring at normal temperature, then adding polyimide and methacrylamide into the reaction kettle, heating and stirring at 45-65 ℃ until the mixture is clear and transparent, and obtaining a first transparent liquid.
And 3, after the temperature of the first transparent liquid is reduced to below 35 ℃, adding azodiisobutyronitrile into the reaction kettle, and stirring to obtain a clear and transparent second transparent liquid.
And 4, pouring the second transparent liquid into a 600 x 10mm mold, firstly placing the mold in an explosion-proof oven for curing for 15h-20h at 50-60 ℃, and then placing the mold in an explosion-proof oven for curing for 4h-8h at 110-130 ℃.
And 5, cooling and demolding to obtain the organic glass with low water absorption.
The performance of the organic glass with low water absorption prepared by the method is tested, the tensile strength is 75.3Mpa, the bending deformation temperature is 104 ℃, the transmittance is 92.05%, the haze is 0.12%, and the water absorption is 0.16%.
Example 2
This example is different from example 1 in that 3% of the polyimide in step 1 of example 1 is replaced with 3% triallyl cyanurate, the polyimide in step 2 of example 1 is replaced with triallyl cyanurate, and the remaining steps are the same as those in example 1, and therefore, the description of this example is omitted.
The performance of the low water absorption organic glass prepared in this example was tested, and the tensile strength was 79.5Mpa, the bending deformation temperature was 112.8 ℃, the transmittance was 92.6%, the haze was 0.13%, and the water absorption was 0.07%.
Example 3
This example differs from example 1 above in that 3% of the polyimide in step 1 of example 1 was replaced with 3% neopentyl glycol diheptanoate, and the neopentyl glycol diheptanoate in step 2 of example 1 was replaced with neopentyl glycol diheptanoate, and the remaining steps are the same as those in example 1 above, and therefore, this example will not be described again here.
The performance of the low water absorption organic glass prepared in this example was tested, and the tensile strength was 82.4Mpa, the bending deformation temperature was 115.2 ℃, the transmittance was 92.72%, the haze was 0.18%, and the water absorption was 0.05%.
Comparative example
The performance of organic glass in the existing market is tested, the tensile strength is 74Mpa, the bending deformation temperature is 105 ℃, the transmittance is 92.35%, the haze is 0.22%, and the water absorption is 0.3%.
By combining the test data of the above examples 1 to 3 and the comparative example, it can be seen that the low water absorption organic glass prepared by the present embodiment can greatly reduce the water absorption, and the tensile strength, the bending deformation temperature, the transmittance and the haze are all improved to a small extent compared with the organic glass in the existing market.
Therefore, the organic glass with low water absorption prepared by the method can reduce the water absorption of the organic glass, and simultaneously retain the advantages of high transmittance, high hardness and the like of the organic glass.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The formula of the organic glass with low water absorption is characterized by comprising the following components in percentage by weight:
90% -95% of monomers;
4.9 to 9 percent of modifier;
0.1% -1% of initiator.
2. The formulation for organic glass with low water absorption of claim 1, wherein the monomer uses methyl methacrylate.
3. The formulation for low water absorption organic glass of claim 1, wherein the modifier comprises one or more of triallyl cyanurate, neopentyl glycol diheptanoate, polyimide, methacrylamide.
4. The formulation for low water absorption organic glass according to claim 1, wherein the initiator uses azobisisobutyronitrile.
5. The preparation method of the organic glass with low water absorption is characterized by comprising the following steps:
(a) weighing the raw materials according to the formula of the organic glass with low water absorption of any one of the claims 1 to 4;
(b) mixing and stirring the monomer and the modifier to obtain a first transparent liquid;
(c) adding the initiator into the first transparent liquid, and stirring to obtain a second transparent liquid;
(d) pouring the second transparent liquid into a mold, and curing;
(e) and cooling and demolding to obtain the low-water-absorption organic glass.
6. The method for preparing organic glass with low water absorption of claim 5, wherein in the step (b), the monomer is added into a reaction kettle and stirred, then the initiator is added into the reaction kettle, and the mixture is heated and stirred to obtain the first transparent liquid.
7. The method for preparing organic glass with low water absorption rate as claimed in claim 6, wherein the temperature for heating and stirring is 45-65 ℃.
8. The method for preparing organic glass with low water absorption of claim 7, wherein in the step (c), the initiator is added into the reaction kettle after the temperature of the first transparent liquid is reduced to below 35 ℃.
9. The method for preparing organic glass with low water absorption rate as claimed in claim 5, wherein in the step (d), the mold is firstly placed at 50-60 ℃ for curing for 15-20 h, and then the mold is placed at 110-130 ℃ for curing for 4-8 h.
10. A method of manufacturing low water absorption organic glass as claimed in claim 5, wherein the size of the mold is 600 x 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210542084.6A CN114933670A (en) | 2022-05-18 | 2022-05-18 | Formula and preparation method of low-water-absorption organic glass |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210542084.6A CN114933670A (en) | 2022-05-18 | 2022-05-18 | Formula and preparation method of low-water-absorption organic glass |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109134739A (en) * | 2018-08-13 | 2019-01-04 | 爱迪特（秦皇岛）科技股份有限公司 | A kind of machinable PMMA of dental CAD/CAM and preparation method thereof |
| CN111808229A (en) * | 2020-08-04 | 2020-10-23 | 无锡龙友光学材料有限公司 | Method for producing optical glass by PMMA monomer casting polymerization method |
| CN114149533A (en) * | 2021-12-21 | 2022-03-08 | 锦西化工研究院有限公司 | Method for preparing green organic glass plate |
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2022
- 2022-05-18 CN CN202210542084.6A patent/CN114933670A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109134739A (en) * | 2018-08-13 | 2019-01-04 | 爱迪特（秦皇岛）科技股份有限公司 | A kind of machinable PMMA of dental CAD/CAM and preparation method thereof |
| CN111808229A (en) * | 2020-08-04 | 2020-10-23 | 无锡龙友光学材料有限公司 | Method for producing optical glass by PMMA monomer casting polymerization method |
| CN114149533A (en) * | 2021-12-21 | 2022-03-08 | 锦西化工研究院有限公司 | Method for preparing green organic glass plate |
Non-Patent Citations (1)
| Title |
|---|
| 张治国, 上海交通大学出版社 * |
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Application publication date: 20220823 |
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