CN1903899A - MAA/AN copolymer foamed plastic and its preparation method - Google Patents
MAA/AN copolymer foamed plastic and its preparation method Download PDFInfo
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- CN1903899A CN1903899A CN 200610091394 CN200610091394A CN1903899A CN 1903899 A CN1903899 A CN 1903899A CN 200610091394 CN200610091394 CN 200610091394 CN 200610091394 A CN200610091394 A CN 200610091394A CN 1903899 A CN1903899 A CN 1903899A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 67
- 239000004033 plastic Substances 0.000 title claims abstract description 67
- 229920001577 copolymer Polymers 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 36
- 239000000178 monomer Substances 0.000 claims abstract description 16
- 239000003999 initiator Substances 0.000 claims abstract description 10
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000006260 foam Substances 0.000 claims description 38
- 239000011521 glass Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- -1 methane amide Chemical class 0.000 claims description 7
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 6
- 238000007334 copolymerization reaction Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 238000005187 foaming Methods 0.000 claims description 4
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 claims description 4
- 229920003192 poly(bis maleimide) Polymers 0.000 claims description 4
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 230000000379 polymerizing effect Effects 0.000 claims description 3
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 claims description 2
- 244000043261 Hevea brasiliensis Species 0.000 claims description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 claims description 2
- NSOXQYCFHDMMGV-UHFFFAOYSA-N Tetrakis(2-hydroxypropyl)ethylenediamine Chemical compound CC(O)CN(CC(C)O)CCN(CC(C)O)CC(C)O NSOXQYCFHDMMGV-UHFFFAOYSA-N 0.000 claims description 2
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229920003052 natural elastomer Polymers 0.000 claims description 2
- 229920001194 natural rubber Polymers 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- VVWRJUBEIPHGQF-UHFFFAOYSA-N propan-2-yl n-propan-2-yloxycarbonyliminocarbamate Chemical compound CC(C)OC(=O)N=NC(=O)OC(C)C VVWRJUBEIPHGQF-UHFFFAOYSA-N 0.000 claims description 2
- 239000003431 cross linking reagent Substances 0.000 abstract description 3
- 239000004088 foaming agent Substances 0.000 abstract description 2
- 239000002667 nucleating agent Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000004697 Polyetherimide Substances 0.000 description 5
- 229920001601 polyetherimide Polymers 0.000 description 5
- 238000007669 thermal treatment Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000004604 Blowing Agent Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 2
- 125000003368 amide group Chemical group 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000003949 imides Chemical group 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KFCDDRTYJQZGKK-UHFFFAOYSA-N 2-methylprop-2-enoic acid;prop-2-enenitrile Chemical compound C=CC#N.CC(=C)C(O)=O KFCDDRTYJQZGKK-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 240000007182 Ochroma pyramidale Species 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 150000008064 anhydrides Chemical group 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- LRDFRRGEGBBSRN-UHFFFAOYSA-N isobutyronitrile Chemical compound CC(C)C#N LRDFRRGEGBBSRN-UHFFFAOYSA-N 0.000 description 1
- DMKSVUSAATWOCU-HROMYWEYSA-N loteprednol etabonate Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@@](C(=O)OCCl)(OC(=O)OCC)[C@@]1(C)C[C@@H]2O DMKSVUSAATWOCU-HROMYWEYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000000399 optical microscopy Methods 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920013657 polymer matrix composite Polymers 0.000 description 1
- 239000011160 polymer matrix composite Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000006462 rearrangement reaction Methods 0.000 description 1
- 239000004616 structural foam Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The present invention relates to a kind of MAA/AN copolymer foamed plastics. It is made up by using monomer (methyl acrylic acid MAA), monomer (acrylonitrile AN), initiator, cross-linking agent, foaming agent, nucleating agent, density-controlling agent and molecular weight regulating agent through a certain preparation process. Besides, Said invention also provides the concrete steps of its preparation process.
Description
(1) technical field under
The present invention relates to a kind of high-performance copolymer foam plastic, especially relate to a kind of porous plastics of making by methacrylic acid (MAA) and vinyl cyanide (AN) multipolymer.
(2) background technology
In the structure design of polymer matrix composites, the sandwich structure matrix material is a kind of typical lightweight, high-strength, high-modulus structural design scheme, it combines the high strength of panel (aluminium alloy, glass fibre, carbon fiber, aramid fiber) and the low density and the high rigidity of high-modulus and sandwich, formed lightweight, high-strength and high inflexible structural composite material, in industries such as aircraft, rocket, radar, shipbuilding, communications and transportation, medicine equipment, extremely important using value has been arranged.
Employed sandwich material mainly contains comb core, cork wood and porous plastics in the sandwich structure matrix material.Can mainly contain hard polyaminoester (PU), polyvinyl chloride (PVC), polystyrene (PS), acrylonitritrile-styrene resin (SAN), polyetherimide (PEI), Polymethacrylimide porous plastics such as (PMI) as the porous plastics kind of sandwich.
In these porous plastics, mechanical property, resistance toheat, the creep-resistant property of Polymethacrylimide (PMI) porous plastics of producing with German Degussa company and Japanese ponding chemical company are the most excellent, also are best by its prepared sandwich structure composite property.The PMI porous plastics has 100% unicellular structure, exist a large amount of imide rings and intermolecular big reactive force that its thermotolerance, strength and stiffness are provided in the macromole, it is the highest heat-resisting porous plastics of present strength and stiffness (180～240 ℃), have high creep-resistant property under its high temperature and make this porous plastics to be suitable for to need high temperature, high pressure solidified resin and prepreg, the co-curing technology that can bear 190 ℃ is to the requirement of foam size stability.And have good cohesiveness between the resin and make the interface binding intensity height, thereby the core material that is suitable as in the high-performance sandwich structure uses, and can replace honeycomb structure, and isotropy, become different shape complex cross-sectional shape through mechanical workout easily, and do not contain any freonll-11, belong to ep-type material, fire resistance reaches related standards such as FAR 25.853 and AITM, the recent development field of representative's high-performance polymer structural foam.
United States Patent (USP) 5928459 has reported that a kind of is the preparation method of monomeric PMI porous plastics with methacrylic acid and methyl propionitrile, this invention is a main monomer with the methacrylonitrile of 40-60wt% and the methacrylic acid of 60-40wt%, the 3rd monomer that adds 0-20wt%, the mixed foaming agent that the methane amide of adding 0.5-8wt% and the unitary fatty alcohol of 3-8 carbon atom are formed, the unsaturated ethylene based mixtures that adds 0.005-5wt% is a linking agent, aggregates into multipolymer under at least a action of evocating.Foam in 200-260 ℃ of temperature range then, 100-130 ℃ of following thermal treatment 2-6h is again at the 180-220 ℃ of hot down 32-64h of place.Finally prepare and to stand 200 ℃, the PMI porous plastics of 0.2-0.7MPa condition moulding sandwich structure matrix material.But the cost control of this porous plastics is not very good.
(3) summary of the invention
In order to overcome the higher defective of above-mentioned PMI porous plastics prior art cost, the invention provides a kind of MAA/AN copolymer foam plastic, can control raw materials cost effectively, and better improve the resistance toheat of porous plastics.
MAA/AN porous plastics of the present invention is made up of monomer, initiator, linking agent, whipping agent, nucleator, density-controlling agent and molecular weight regulator, and its recipe ingredient is by weight than counting:
Monomer (methacrylic acid MAA) 42～62
Monomer (vinyl cyanide AN) 58～38
Initiator 0.18～0.40
Linking agent 1.3～3.5
Whipping agent 2.0～8.0
Nucleator 0.3～1.3
Density-controlling agent 0.02～0.35
Molecular weight regulator 0.01～0.1
The preparation method of above-mentioned MAA/AN copolymer foam plastic comprises the steps:
(1) monomer, initiator, linking agent, whipping agent, nucleator, density-controlling agent and molecular weight regulator are pressed batching, uniform mixing forms stock liquid;
(2) stock liquid is poured in the mould of being made by two dull and stereotyped unorganic glasses and natural rubber or EPT rubber packing circle, the glass mold outside is stepped up by anchor clamps;
(3) filling being had the glass mold of stock liquid put into strong circulator bath device carries out polymerization and forms transparent foamed MAA/AN copolymerization sheet, polymerizing condition: 40～60 ℃ of water temperatures, time 24～72h;
(4) the foamed MAA/AN copolymerization sheet that (3) step was obtained carries out free foaming in 180～200 ℃ strong recirculated hot air, prepares the MAA/AN copolymer foam plastic;
(5) the MAA/AN copolymer foam plastic that (4) step was obtained is heat-treated 6～12h in 140～180 ℃ warm air, with further raising cyclisation rate.
Preparation method's principle of above-mentioned MAA/AN copolymer foam plastic is: with monomer methacrylic acid, vinyl cyanide and initiator, whipping agent, linking agent, density-controlling agent is basic raw material, first synthesize methyl acrylic acid-acrylonitrile copolymer under the Undec prerequisite of whipping agent; Elevated temperature makes whipping agent decompose produce gas and foaming then, makes simultaneously that carboxyl forms the six-membered cyclic imide with itrile group by molecular rearrangement reaction in the multipolymer, prepares the MAA/AN copolymer foam plastic.
As a preferred version of the present invention, described initiator adopts Diisopropyl azodicarboxylate AIBN.
As another preferred version of the present invention, described linking agent adopts acrylamide AM or Methacrylamide MAM.
As the 3rd preferred version of the present invention, described whipping agent adopts methane amide or propylene glycol or amylalcohol or hexanol.
As the 4th preferred version of the present invention, described nucleator adopts urea.
As the 5th preferred version of the present invention, described density-controlling agent adopts bismaleimides BMI.
As the 6th preferred version of the present invention, described molecular weight regulator adopts n-dodecyl mercaptan or Monoethanolamine MEA BASF or quadrol or Virahol.
The MAA/AN copolymer foam plastic that the present invention relates to is compared with other porous plastics, has the following advantages:
1. adopt vinyl cyanide replace expensive methacrylonitrile (domestic AN price only for MAN 6%), the MAA/AN copolymer foam plastic is descended significantly than the cost of PMI porous plastics, the material cost of MAA/AN porous plastics has only the 7-10% of PMI porous plastics sale price, and economic benefit is very remarkable.
2. be linking agent acrylamide or Methacrylamide by adding the 3rd monomer, make and fail to carry out the carboxyl of cyclisation and anhydride group and amido reaction and produce intermolecular cross-linking (being shown below) with vinyl cyanide, improve the reactive force of molecular chain, guaranteed the high-performance of MAA/AN copolymer foam plastic.
3. by adding the whipping agent methane amide, not only can play the effect of pneumatogen, and the NH that generates after the amido on its molecule and its decomposition
3Can increase cyclisation rate and intermolecular reactive force with polymer reaction, be shown below.
4. in the porous plastics last handling process, the reaction of part A N chain link generation-CN cyclic condensation forms trapezoidal segment, makes the MAA/AN copolymer foam plastic have higher resistance toheat (as follows).
5. use urea as nucleator, help forming evenly tiny foam structure, and can improve cyclisation rate and Intermolecular Forces.
6. use bismaleimides as density-controlling agent, not only can control the different density of MAA/AN copolymer foam plastic, and help improving intermolecular reactive force.
7. the MAA/AN copolymer foam plastic of preparing, its main mechanical property is above domestic existing other rigid foams and external high-performance polyethers imide (PEI), cross-linked polrvinyl chloride (XPVC) porous plastics under the equal densities, and approaching also part is above different poly-first acrylimide (PMI) porous plastics of external best performance.
The salient features of MAA/AN porous plastics is as shown in table 1, and MAA/AN copolymer foam plastic and PEI, XPVC porous plastics mechanical property contrast as shown in table 2.
Table 1MAA/AN copolymer foam plastic mechanical property, resistance toheat
| Performance | Density (g/cm 3) | Testing standard | ||||
| 0.032 | 0.043 | 0.052 | 0.063 | 0.075 | ||
| Flexural strength MPa compressive strength MPa tensile strength MPa shearing resistance MPa Young's modulus MPa heat-drawn wire ℃ | 0.7 0.35 0.7 0.4 21 210 | 1.1 0.6 1.0 0.6 36 210 | 1.4 0.8 1.3 0.8 47 215 | 1.8 1.3 1.8 1.1 65 240 | 2.2 1.7 2.2 1.3 78 240 | ASTM：D790-99 ASTM：D1621-00 ASTM：D638-99 ASTM：C273-00 ASTM：D638-99 DIN：3424 |
Table 2MAA/AN copolymer foam plastic and PEI, the contrast of XPVC porous plastics mechanical property
| Performance | The MAA/AN copolymer foam plastic | Airex R82PEI porous plastics | HEREX C70XPVC porous plastics |
| Density g/cm3 tensile strength MPa compressive strength MPa shearing resistance MPa Young's modulus MPa | 0.060 1.7 1.1 1.0 58 | 0.060 1.7 0.7 0.8 45 | 0.060 1.3 0.9 0.8 45 |
(4) description of drawings
Accompanying drawing 1 is preparation flow figure of the present invention.
Accompanying drawing 2 is optical microscopy maps of the MAA/AN copolymer foam plastic microtexture for preparing of the present invention.
Accompanying drawing 3 is bismaleimides figure that influence to MAA/AN copolymer foam plastic density.
(5) embodiment
Below in conjunction with accompanying drawing 1 and embodiment, further specify the present invention.Table 3 is depicted as embodiment 1, embodiment 2, embodiment 3, the embodiment 4 of preparation MAA/AN copolymer foam plastic.
The embodiment of the MAA/AN copolymer foam plastic of table 3 preparation
| Material name | Chemical name | Each raw material consumption (weight part ratio meter) | |||
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | ||
| Monomer 1 monomer 2 initator crosslinking agent crosslinking agent blowing agent blowing agent blowing agent nucleator density-controlling agent molecular weight regulators | Methacrylic acid acrylonitrile azodiisobutyronitrile acrylamide Methacrylamide formamide propane diols amylalcohol urea BMI monoethanolamine | 42 58 0.23 0 0 0 0 8.0 1 0 0 | 42 58 0.40 0 3.1 6.0 0 0 1 0.05 0.10 | 50 50 0.22 2.6 0 0 4.0 0 1.3 0 0 | 62 38 0.18 2.4 0 8.0 0 0 0 0.18 0 |
According to embodiment 1, embodiment 2, embodiment 3, embodiment 4 preparation raw material liquid; Stock liquid is poured in the mould of being made by two dull and stereotyped unorganic glasses and rubber seal, and the glass mold outside is stepped up by anchor clamps; Having the glass mold of stock liquid to put into strong circulator bath device filling carries out polymerization and forms transparent foamed MAA/AN copolymerization sheet, polymerizing condition:
55 ℃ of embodiment 1 water temperatures, time 50h;
40 ℃ of embodiment 2 water temperatures, time 72h;
55 ℃ of embodiment 3 water temperatures, time 50h;
60 ℃ of embodiment 4 water temperatures, time 24h;
The foamed MAA/AN copolymerization sheet that the last step was obtained is prepared the MAA/AN copolymer foam plastic carrying out free foaming at 180 ℃, embodiment 3 at 200 ℃, embodiment 2 according to embodiment 1 in 185 ℃ and the strong circulation baking oven of embodiment 4 at 185 ℃; The MAA/AN copolymer foam plastic that the last step was obtained according to embodiment 1 in 140 ℃ of baking ovens thermal treatment 4h then in 180 ℃ of baking ovens thermal treatment 6h, embodiment 2 in 140 ℃ of baking ovens thermal treatment 4h then in 180 ℃ of baking ovens thermal treatment 6h, embodiment 3 in 160 ℃ of baking ovens, heat-treat 8h and embodiment 4 heat-treats 8h in 160 ℃ baking oven; Final embodiment 1 resulting porous plastics density is 0.03g/cm
3, embodiment 2 resulting porous plastics density are 0.06g/cm
3, embodiment 3 resulting porous plastics density are 0.05g/cm
3, embodiment 4 resulting porous plastics density are 0.15g/cm
3
Claims (8)
1, a kind of MAA/AN copolymer foam plastic is made up of monomer, initiator, linking agent, whipping agent, nucleator, density-controlling agent and molecular weight regulator, it is characterized in that: described recipe ingredient is by weight than counting:
Monomer (methacrylic acid MAA) 42～62
Monomer (vinyl cyanide AN) 58～38
Initiator 0.18～0.40
Linking agent 1.3～3.5
Whipping agent 2.0～8.0
Nucleator 0.3～1.3
Density-controlling agent 0.02～0.35
Molecular weight regulator 0.01～0.1.
2, according to the MAA/AN copolymer foam plastic of claim 1, it is characterized in that: described initiator adopts Diisopropyl azodicarboxylate AIBN.
3, according to the MAA/AN copolymer foam plastic of claim 1, it is characterized in that: described linking agent adopts acrylamide AM or Methacrylamide MAM.
4, according to the MAA/AN copolymer foam plastic of claim 1, it is characterized in that: described whipping agent adopts methane amide or propylene glycol or amylalcohol or hexanol.
5, according to the MAA/AN copolymer foam plastic of claim 1, it is characterized in that: described nucleator adopts urea.
6, according to the MAA/AN copolymer foam plastic of claim 1, it is characterized in that: described density-controlling agent adopts bismaleimides BMI.
7, according to the MAA/AN copolymer foam plastic of claim 1, it is characterized in that: described molecular weight regulator adopts n-dodecyl mercaptan or Monoethanolamine MEA BASF or quadrol or Virahol.
8, a kind of preparation method of MAA/AN copolymer foam plastic is characterized in that preparation process is as follows:
(1) monomer, initiator, linking agent, whipping agent, nucleator, density-controlling agent and molecular weight regulator are pressed batching, uniform mixing forms stock liquid;
(2) stock liquid is poured in the mould of being made by two dull and stereotyped unorganic glasses and natural rubber or EPT rubber packing circle, the glass mold outside is stepped up by anchor clamps;
(3) filling being had the glass mold of stock liquid put into strong circulator bath device carries out polymerization and forms transparent foamed MAA/AN copolymerization sheet, polymerizing condition: 40～60 ℃ of water temperatures, time 24～72h;
(4) the foamed MAA/AN copolymerization sheet that (3) step was obtained carries out free foaming in 180～200 ℃ strong recirculated hot air, prepares the MAA/AN copolymer foam plastic;
(5) the MAA/AN copolymer foam plastic that (4) step was obtained is heat-treated 6～12h in 140～180 ℃ warm air.
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| CNB2006100913941A CN100420702C (en) | 2005-07-28 | 2006-06-09 | MAA/AN copolymer foamed plastic and its preparation method |
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| CN101328243B (en) * | 2007-06-20 | 2011-05-18 | 中国科学院化学研究所 | Polypropylene acid imide foam material and preparation thereof |
| CN102167776A (en) * | 2011-01-06 | 2011-08-31 | 西北工业大学 | MAA/AN copolymer polyfoam and preparation method thereof |
| CN102675796A (en) * | 2012-05-17 | 2012-09-19 | 镇江育达复合材料有限公司 | Preparation method and applications of low-water-absorption polymethacrylimide foamed plastics |
| CN103122116A (en) * | 2013-01-18 | 2013-05-29 | 西北工业大学 | High-density MAA/MAN (methacrylic acid/methacrylonitrile) copolymer foam plastic and preparation method thereof |
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