WO2022103244A1 - 그라파이트 시트용 폴리이미드 필름 및 이로부터 제조된 그라파이트 시트 - Google Patents
그라파이트 시트용 폴리이미드 필름 및 이로부터 제조된 그라파이트 시트 Download PDFInfo
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- WO2022103244A1 WO2022103244A1 PCT/KR2021/095100 KR2021095100W WO2022103244A1 WO 2022103244 A1 WO2022103244 A1 WO 2022103244A1 KR 2021095100 W KR2021095100 W KR 2021095100W WO 2022103244 A1 WO2022103244 A1 WO 2022103244A1
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- WIPO (PCT)
- Prior art keywords
- graphite sheet
- polyimide film
- weight
- equation
- polyamic acid
- Prior art date
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- 229920001721 polyimide Polymers 0.000 title claims abstract description 73
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 69
- 239000010439 graphite Substances 0.000 title claims abstract description 69
- 238000002441 X-ray diffraction Methods 0.000 claims abstract description 15
- 239000000178 monomer Substances 0.000 claims description 62
- 239000000203 mixture Substances 0.000 claims description 48
- 229920005575 poly(amic acid) Polymers 0.000 claims description 39
- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 claims description 31
- 150000004985 diamines Chemical class 0.000 claims description 31
- 108010025899 gelatin film Proteins 0.000 claims description 30
- 239000002904 solvent Substances 0.000 claims description 29
- 239000003054 catalyst Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 239000002243 precursor Substances 0.000 claims description 16
- 239000011256 inorganic filler Substances 0.000 claims description 15
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 239000012024 dehydrating agents Substances 0.000 claims description 11
- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 5
- 238000010000 carbonizing Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- VWAXWVUVEMNRNM-UHFFFAOYSA-N 4-(4-aminophenoxy)aniline Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1.C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 VWAXWVUVEMNRNM-UHFFFAOYSA-N 0.000 claims 1
- -1 aliphatic tertiary amine Chemical class 0.000 description 10
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 6
- 229910003481 amorphous carbon Inorganic materials 0.000 description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000005087 graphitization Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- ITQTTZVARXURQS-UHFFFAOYSA-N 3-methylpyridine Chemical compound CC1=CC=CN=C1 ITQTTZVARXURQS-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 235000019739 Dicalciumphosphate Nutrition 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 description 2
- 229940038472 dicalcium phosphate Drugs 0.000 description 2
- 229910000390 dicalcium phosphate Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- AWJUIBRHMBBTKR-UHFFFAOYSA-N isoquinoline Chemical compound C1=NC=CC2=CC=CC=C21 AWJUIBRHMBBTKR-UHFFFAOYSA-N 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000002798 polar solvent Substances 0.000 description 2
- 229920006254 polymer film Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000007363 ring formation reaction Methods 0.000 description 2
- 238000000859 sublimation Methods 0.000 description 2
- 230000008022 sublimation Effects 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 description 1
- AURKDQJEOYBJSQ-UHFFFAOYSA-N 2-hydroxypropanoyl 2-hydroxypropanoate Chemical compound CC(O)C(=O)OC(=O)C(C)O AURKDQJEOYBJSQ-UHFFFAOYSA-N 0.000 description 1
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 1
- WXNZTHHGJRFXKQ-UHFFFAOYSA-N 4-chlorophenol Chemical compound OC1=CC=C(Cl)C=C1 WXNZTHHGJRFXKQ-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- WYVAMUWZEOHJOQ-UHFFFAOYSA-N propionic anhydride Chemical compound CCC(=O)OC(=O)CC WYVAMUWZEOHJOQ-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/522—Graphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/524—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from polymer precursors, e.g. glass-like carbon material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
- C08G73/1021—Preparatory processes from tetracarboxylic acids or derivatives and diamines characterised by the catalyst used
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
- C08G73/1071—Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- It relates to a polyimide film for a graphite sheet and a graphite sheet prepared therefrom, and more particularly, to a polyimide film for a graphite sheet having excellent thermal conductivity and a graphite sheet prepared therefrom.
- the graphite sheet has a higher thermal conductivity than a metal sheet such as copper or aluminum, and is attracting attention as a heat dissipation member for electronic devices.
- a graphite sheet may be manufactured by various methods, for example, it may be manufactured by carbonizing and graphitizing a polymer film.
- polyimide films are spotlighted as polymer films for graphite sheet production due to their excellent mechanical, thermal, dimensional stability, and chemical stability.
- An object of the present invention is to provide a polyimide film for a graphite sheet having excellent thermal conductivity.
- Another object of the present invention is to provide a graphite sheet prepared from the polyimide film.
- a polyimide film for a graphite sheet has a full width at half maximum (FWHM) (deg., 2 ⁇ ) of 30° to 37° of the (002) peak in X-ray diffraction analysis in the plane direction, and X-ray diffraction in the thickness direction
- FWHM full width at half maximum
- Herman's orientation index (f c ) of Equation 1 below may be 0.06 to 0.20:
- Equation 1 ⁇ is the full width at half maximum (deg., 2 ⁇ ) of the (002) peak.
- the polyimide film may be derived from a stretched gel film formed from a polyamic acid solution.
- the stretched gel film may be one in which the gel film is stretched at a ratio of 1.01 times to 1.5 times in MD (machine direction).
- the weight average molecular weight of the polyamic acid is 100,000 g/mol to 170,000 g/mol
- the polyamic acid solution is prepared by reacting a dianhydride monomer and a diamine monomer in a solvent, It may be one that satisfies the following Equation 2:
- Equation 2 ⁇ 0 is the viscosity (23° C., unit: cps) of the polyamic acid solution, % (s) is the solid content of the polyamic acid solution, and diamine monomer with respect to the total weight of diamine monomer, dianhydride monomer and solvent and a weight percentage (unit: weight %) of the dianhydride monomer, and e is a natural constant.
- Equation 2 ⁇ 0 may be 50,000cps to 300,000cps, and % (s) may be 15% to 30% by weight.
- the diamine monomer comprises 4,4'-oxydianiline, p-phenylene diamine, or a combination thereof
- the dianhydride monomer may include pyromellitic dianhydride.
- the gel film before stretching is prepared by forming a precursor composition formed by adding a catalyst composition to the polyamic acid solution and drying the film, and the precursor composition satisfies the following formula 3 can:
- Equation 3 ⁇ 1 is the initial viscosity of the precursor composition (23° C., unit: cps), t( ⁇ 2 ) is the time (unit: seconds) from ⁇ 1 to ⁇ 2 , ⁇ 2 is the final viscosity (23°C, unit: cps) of the precursor composition.
- Equation 3 ⁇ 1 may be 2,500 cps to 30,000 cps, and t( ⁇ 2 ) may be 100 seconds to 400 seconds.
- the catalyst composition may include an imidizing agent, a dehydrating agent, a sublimable inorganic filler, and a solvent.
- the catalyst composition comprises 3% to 15% by weight of the imidizing agent; 30% to 70% by weight of the dehydrating agent; 0.01% to 0.5% by weight of the sublimable inorganic filler; and the remaining amount of the solvent.
- the catalyst composition may be added in an amount of 30 to 60 parts by weight per 100 parts by weight of the polyamic acid solution.
- the drying may be performed at a temperature of 30°C to 200°C for 15 seconds to 30 minutes.
- the polyimide film may be prepared by heat-treating the stretched gel film at a temperature of 250° C. to 600° C. for 30 seconds to 40 minutes.
- a graphite sheet is provided.
- the graphite sheet may be prepared by carbonizing and graphitizing the polyimide film for a graphite sheet of any one of the first to thirteenth embodiments.
- the graphite sheet may have a thickness of 10 ⁇ m to 100 ⁇ m, and a thermal conductivity of 1,400 W/m ⁇ K or more.
- the present invention has the effect of providing a polyimide film for a graphite sheet and a graphite sheet having excellent thermal conductivity.
- the viscosity may be measured using a HAAKE Mars Rheometer at 23° C. and a shear rate of 1s ⁇ 1 .
- a gel film may mean that it is in an intermediate stage of curing from polyamic acid to polyimide and has self-supporting properties.
- the polyimide film for a graphite sheet according to an aspect of the present invention has a full width at half maximum (FWHM) (deg., 2 ⁇ ) of the (002) peak during X-ray diffraction analysis in the plane direction of 30° to 37° and Herman's orientation index (f c ) of Equation 1 may be 0.06 to 0.20 during X-ray diffraction analysis for the thickness direction:
- FWHM full width at half maximum
- f c Herman's orientation index
- Equation 1 ⁇ is the full width at half maximum (deg., 2 ⁇ ) of the (002) peak.
- the polyimide film may have high orientation, and as a result, it may be possible to manufacture a graphite sheet having excellent thermal conductivity.
- the polyimide film may have a full width at half maximum of the (002) peak of 30°, 31°, 32°, 33°, 34°, 35°, 36° or 37° in X-ray diffraction analysis with respect to the in-plane direction.
- the polyimide film has a full width at half maximum of the (002) peak of 32° to 37° in X-ray diffraction analysis with respect to the plane direction, 32° to 36° according to another embodiment, and 33 according to another embodiment ° to 36 °, according to another embodiment, may be 33 ° to 34 °, but is not limited thereto.
- the polyimide film has a Hermann orientation degree (f c ) of 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19 or 0.20.
- the polyimide film has a Hermann orientation degree (f c ) of Equation 1 in X-ray diffraction analysis in the thickness direction of 0.06 to 0.16, according to another embodiment, 0.08 to 0.16, and according to another embodiment, 0.08 to 0.11, but may be 0.10 to 0.12 according to another embodiment, but is not limited thereto.
- the polyimide film may be derived from a stretched gel film formed from a polyamic acid solution.
- the methods for improving the thermal conductivity of the graphite sheet there is a method of increasing the orientation of the polyimide film by stretching the gel film. Therefore, the polyimide film derived from the stretched gel film may have a higher orientation than the polyimide film derived from the unstretched gel film, and as a result, it may be more advantageous for the production of a graphite sheet having excellent thermal conductivity.
- the stretched gel film may be one in which the gel film is stretched in at least one of a machine direction (MD) and a transverse direction (TD).
- MD machine direction
- TD transverse direction
- the stretched gel film has an MD of 1.01 times to 1.5 times (for example, 1.01 times, 1.05 times, 1.1 times, 1.15 times, 1.2 times, 1.25 times, 1.3 times, 1.35 times, 1.4 times, 1.45 times, or 1.5 times).
- the stretched gel film may be one stretched in a ratio of 1.03 times to 1.5 times, for example, 1.05 times to 1.4 times, for another example, 1.1 times to 1.4 times, in which the gel film is MD. It is not limited.
- the polyamic acid solution may be prepared by reacting a dianhydride monomer and a diamine monomer in a solvent.
- the solvent is not particularly limited as long as it can dissolve the polyamic acid.
- the solvent may include an aprotic polar solvent.
- the aprotic polar solvent include amide solvents such as N,N'-dimethylformamide (DMF) and N,N'-dimethylacetamide (DMAc), and phenolic solvents such as p-chlorophenol and o-chlorophenol. solvent, N-methyl-pyrrolidone (NMP), gamma butyrolactone (GBL), Diglyme, and the like, and these may be used alone or in combination of two or more.
- the solubility of polyamic acid may be controlled by using an auxiliary solvent such as toluene, tetrahydrofuran (THF), acetone, methyl ethyl ketone (MEK), methanol, ethanol, and water.
- an auxiliary solvent such as toluene, tetrahydrofuran (THF), acetone, methyl ethyl ketone (MEK), methanol, ethanol, and water.
- the diamine monomer various diamine monomers known in the art may be used without limitation within a range that does not impair the purpose of the present invention.
- the diamine monomer may include 4,4'-oxydianiline (ODA), p-phenyldiamine (PPD), or a combination thereof, and in this case, the orientation of the polyimide film may be excellent.
- the dianhydride monomer various dianhydride monomers known in the art may be used without limitation within a range that does not impair the purpose of the present invention.
- the dianhydride monomer may include pyromellitic dianhydride (PMDA), and in this case, the polyimide film may have excellent orientation.
- PMDA pyromellitic dianhydride
- the diamine monomer and the dianhydride monomer are included in the solvent to form a substantially equimolar amount and reacted, where 'substantially equimolar' means that the dianhydride monomer is contained in an amount of 99.8 mol% to 100.2 mol% based on the total number of moles of the diamine monomer.
- 'substantially equimolar' means that the dianhydride monomer is contained in an amount of 99.8 mol% to 100.2 mol% based on the total number of moles of the diamine monomer.
- the diamine monomer and dianhydride monomer may refer to one or more (eg, one or two) diamine monomer and dianhydride monomer.
- the polyamic acid solution may satisfy Equation 2:
- Equation 2 ⁇ 0 is the viscosity (23° C., unit: cps) of the polyamic acid solution, % (s) is the solid content of the polyamic acid solution, and diamine monomer with respect to the total weight of diamine monomer, dianhydride monomer and solvent and a weight percentage (unit: weight %) of the dianhydride monomer, and e is a natural constant. It may be advantageous to manufacture a polyimide film having high orientation in the above range.
- ⁇ 0 may be 50,000cps to 300,000cps (eg, 50,000cps, 100,000cps, 150,000cps, 200,000cps, 250,000cps, or 300,000cps). It may be advantageous to manufacture a polyimide film having high orientation in the above range.
- ⁇ 0 may be 70,000cps to 300,000cps, for example, 70,000cps to 250,000cps, for another example, 100,000cps to 150,000cps, but is not limited thereto.
- % (s) is 15% to 30% by weight (eg, 15% by weight, 16% by weight, 17% by weight, 18% by weight, 19% by weight, 20% by weight) , 21% by weight, 22% by weight, 23% by weight, 24% by weight, 25% by weight, 26% by weight, 27% by weight, 28% by weight, 29% by weight or 30% by weight). It may be advantageous to manufacture a polyimide film having high orientation in the above range.
- % (s) may be 17% to 25% by weight, for example, from 17% to 23% by weight, for example from 20% to 23% by weight, but is not limited thereto. .
- the weight average molecular weight of the polyamic acid is 100,000 g / mol to 170,000 g / mol (eg, 100,000 g / mol, 110,000 g / mol, 120,000 g / mol, 130,000 g / mol, 140,000 g / mol, 150,000 g/mol, 160,000 g/mol or 170,000 g/mol). It may be advantageous to manufacture a polyimide film having high orientation in the above range.
- the weight average molecular weight of the polyamic acid is 100,000 g / mol to 160,000 g / mol, for example 100,000 g / mol to 150,000 g / mol, for another example 120,000 g / mol to 150,000 g / mol or Another example may be 130,000 g/mol to 150,000 g/mol, but is not limited thereto.
- the gel film may be prepared by forming a precursor composition formed by adding a catalyst composition to a polyamic acid solution and drying the film.
- the 'catalyst composition' may refer to a composition including an imidizing agent that promotes the ring closure reaction of the polyamic acid and/or a dehydrating agent that promotes the ring closure reaction through the dehydration action of the polyamic acid.
- an aliphatic tertiary amine, an aromatic tertiary amine, a heterocyclic tertiary amine, or the like may be used.
- a heterocyclic tertiary amine can be used from the viewpoint of reactivity as a catalyst.
- the heterocyclic tertiary amine include quinoline, isoquinoline, ⁇ -picoline, and pyridine, and these may be used alone or in combination of two or more.
- the imidizing agent may be added in an amount of 0.05 mol to 3 mol (eg, 0.2 mol to 2 mol) per 1 mol of the amic acid group in the polyamic acid.
- the present invention is not limited thereto.
- the dehydrating agent examples include aliphatic acid anhydride, aromatic acid anhydride, N,N'-dialkylcarbodiimide, lower aliphatic halide, halogenated lower aliphatic acid anhydride, arylphosphonic acid dihalide, thionyl halide, and the like. and these may be used alone or in combination of two or more. Among them, aliphatic acid anhydrides such as acetic anhydride, propionic anhydride and lactic acid anhydride can be used from the viewpoints of availability and cost.
- the dehydrating agent may be added in an amount of 0.5 mol to 5 mol (eg, 1 mol to 4 mol) based on 1 mol of the amic acid group in the polyamic acid. , but is not limited thereto.
- the catalyst composition may further include a sublimable inorganic filler.
- the 'sublimable inorganic filler' may mean an inorganic filler that is sublimated by heat during carbonization and/or graphitization processes in manufacturing the graphite sheet.
- the polyimide film includes a sublimable inorganic filler, voids are formed in the graphite sheet by the gas generated through sublimation of the sublimable inorganic filler during the manufacture of the graphite sheet, thereby exhausting the sublimation gas generated during the manufacture of the graphite sheet It is possible to obtain a graphite sheet of good quality by being smoothly formed, as well as improve the flexibility of the graphite sheet to ultimately improve the handleability and formability of the graphite sheet.
- sublimable inorganic filler examples include, but are not limited to, dicalcium phosphate, barium sulfate, calcium carbonate, and the like.
- the average particle diameter (D 50 ) of the sublimable inorganic filler may be 0.05 ⁇ m to 5.0 ⁇ m (eg, 0.1 ⁇ m to 4.0 ⁇ m), and a good quality graphite sheet can be obtained in the above range, but is not limited thereto.
- the sublimable inorganic filler may be included in an amount of 0.01 parts by weight to 0.5 parts by weight (eg, 0.02 parts by weight to 0.2 parts by weight) based on 100 parts by weight of the polyamic acid, and a good quality graphite sheet can be obtained in the above range, It is not limited.
- the catalyst composition may further include a solvent.
- a description of the solvent that may be included in the catalyst composition refer to the description of the solvent included in the polyamic acid solution.
- the catalyst composition may include an imidizing agent, a dehydrating agent, a sublimable inorganic filler and a solvent.
- the catalyst composition comprises 3% to 15% by weight of the imidizing agent, 30% to 70% by weight of the dehydrating agent, 0.01% to 0.5% by weight of the sublimability, based on the total weight of the catalyst composition. inorganic fillers, and the remainder of a solvent.
- the catalyst composition may comprise, based on the total weight of the catalyst composition, 5% to 10% by weight of an imidizing agent, 40% to 60% by weight of a dehydrating agent, 0.02% to 0.2% by weight of a sublimable inorganic filler, and a residual amount of a solvent, but is not limited thereto.
- the catalyst composition may be added in an amount of 30 to 60 parts by weight per 100 parts by weight of the polyamic acid solution. It may be advantageous to manufacture a polyimide film having high orientation in the above range.
- the catalyst composition may be added in an amount of 35 parts by weight to 55 parts by weight, for example, 37 parts by weight to 52 parts by weight per 100 parts by weight of the polyamic acid solution, but is not limited thereto.
- the precursor composition may satisfy Equation 3:
- Equation 3 ⁇ 1 is the initial viscosity of the precursor composition (23° C., unit: cps), t( ⁇ 2 ) is the time (unit: seconds) from ⁇ 1 to ⁇ 2 , ⁇ 2 is the final viscosity (23°C, unit: cps) of the precursor composition. More specifically, ⁇ 1 is the viscosity immediately after adding the catalyst composition to the polyamic acid solution, and ⁇ 2 is the point at which the viscosity no longer increases when the viscosity is continuously measured after adding the catalyst composition to the polyamic acid solution is the viscosity, that is, the maximum viscosity. It may be advantageous to manufacture a polyimide film having high orientation in the above range.
- ⁇ 1 is 2,500cps to 30,000cps (eg, 2,500cps, 5,000cps, 7,500cps, 10,000cps, 12,500cps, 15,000cps, 17,500cps, 20,000cps, 22,500cps, 25,000 cps, 27,500 cps or 30,000 cps). It may be advantageous to manufacture a polyimide film having high orientation in the above range.
- ⁇ 1 may be 5,000cps to 25,000cps, for example, 7,500cps to 15,000cps, but is not limited thereto.
- t( ⁇ 2 ) may be 100 seconds to 400 seconds (eg, 100 seconds, 150 seconds, 200 seconds, 250 seconds, 300 seconds, 350 seconds, or 400 seconds). . It may be advantageous to manufacture a polyimide film having high orientation in the above range.
- t( ⁇ 2 ) may be 100 seconds to 390 seconds, and for another example, t( ⁇ 2 ) may be 100 seconds to 380 seconds, but is not limited thereto.
- the film formation may be made by a method of casting the precursor composition on a support, and as the support, a glass plate, an aluminum foil, an endless stainless belt, a stainless drum, or the like may be used.
- drying may be performed at a temperature of 30° C. to 200° C. (eg, 80° C. to 180° C.) for 15 seconds to 30 minutes (eg, 2 minutes to 10 minutes). It may be advantageous to manufacture a polyimide film having high orientation in the above range, but is not limited thereto.
- the heat treatment may be performed to obtain a polyimide film by removing the solvent and the like remaining in the stretched gel film and imidizing most of the remaining amic acid groups.
- the heat treatment is performed at a temperature of 250° C. to 600° C. (eg, 260° C. to 550° C., for example, 270° C. to 500° C.) for 30 seconds to 40 minutes (eg, 2 minutes to 15 minutes).
- a temperature of 250° C. to 600° C. eg, 260° C. to 550° C., for example, 270° C. to 500° C.
- 30 seconds to 40 minutes eg, 2 minutes to 15 minutes.
- Sufficient imidization may be achieved in the above range, but the present invention is not limited thereto.
- the above-described polyimide film has excellent orientation, and as a result, a graphite sheet prepared therefrom may have excellent thermal conductivity.
- a graphite sheet made from the above-described polyimide film.
- the graphite sheet can be obtained by carbonizing and graphitizing the above-described polyimide film.
- 'Carbonization' is a process of thermally decomposing the polymer chain of a polyimide film to form a preliminary graphite sheet including an amorphous carbon body, an amorphous carbon body and/or an amorphous carbon body.
- the polyimide film is heated under reduced pressure or in an inert gas atmosphere. It may be carried out by increasing the temperature from room temperature to a temperature in the range of 1,000° C. to 1,500° C., which is the highest temperature, over 0.3° C./min to 10° C./min, and maintaining the temperature for 10 minutes to 180 minutes, but is not limited thereto.
- pressure may be applied to the polyimide film using a hot press or the like during carbonization for high carbon orientation, and the pressure at this time is, for example, 5 kg/cm 2 or more, for example, 15 kg/cm 2 or more.
- Another example may be 25kg/cm 2 or more, but is not limited thereto.
- 'Graphitization' is a process of rearranging carbon in an amorphous carbon body, an amorphous carbon body and/or an amorphous carbon body to form a graphite sheet, for example, a preliminary graphite sheet, optionally from room temperature to the highest temperature in an inert gas atmosphere Phosphorus may be carried out by raising the temperature over 0.5 °C/min to 20 °C/min to a temperature in the range of 2,500 °C to 3,000 °C, and holding for 10 minutes to 300 minutes, but is not limited thereto.
- pressure may be applied to the preliminary graphite sheet using a hot press during graphitization for high orientation of carbon, and the pressure at this time is, for example, 100 kg/cm 2 or more, for example, 200 kg/cm 2 Above, another example may be 300kg/cm 2 or more, but is not limited thereto.
- the graphite sheet has a thickness of 10 ⁇ m to 100 ⁇ m (eg, 15 ⁇ m to 90 ⁇ m), and a thermal conductivity of 1,400 W/m ⁇ K or more (eg, 1,400 W/m ⁇ K) to 1,500 W/m ⁇ K).
- the graphite sheet according to an embodiment of the present invention may have excellent thermal conductivity because it is manufactured using a polyimide film with high orientation prepared from a gel film suitable for stretching.
- the prepared precursor composition was cast on a SUS plate (100SA, Sandvik) to a thickness of 250 ⁇ m using a doctor blade to form a film, and dried at 130° C. for 4 minutes to prepare a gel film.
- the gel film was stretched in MD at the draw ratios of Tables 1 and 2.
- the stretched gel film was heat-treated at 420° C. for 5 minutes to prepare a polyimide film having a thickness of 50 ⁇ m.
- Viscosity Using a viscosity measuring device (Rheostress 600, Haake), the polyamic acid solution and the precursor composition according to time (unit: seconds) under the conditions of a shear rate of 1/s, a temperature of 23° C., and a 1 mm plate gap. Viscosity (unit: cps) was measured.
- Weight average molecular weight (Mw) The weight average molecular weight (unit: g/mol) of polyamic acid in terms of polystyrene was obtained using molecular weight measuring equipment (Sykam GPC SYSTEM, Razerchrom).
- the thus-prepared graphite sheet was cut into a circular shape having a diameter of 25.4 mm to prepare a specimen, and the thermal diffusivity of the specimen was measured by a laser flash method using a thermal diffusivity measuring instrument (LFA 467, Netsch Co.). Thermal conductivity was obtained by multiplying the measured value of the thermal diffusivity by density and specific heat (theoretical value: 0.85 kJ/kg ⁇ K).
- Example 1 Example 2 Example 3 Example 4 Example 5 half width 37 33 30 32 36 f c 0.06 0.11 0.20 0.16 0.08 ⁇ 0 289,340 139,940 52,500 140,335 142,960 % (s) 25 22 18 22 22 Equation 1 10 17 39 17 17 Mw 118,611 136,534 153,878 130,025 133,579 ⁇ 1 9,580 11,027 12,474 10,809 7,556 t( ⁇ 2 ) 175 198 267 366 102 Equation 2 55 56 47 30 74 gel film formed or not ⁇ ⁇ ⁇ ⁇ draw ratio 1.1 times 1.3 times 1.5 times 1.4 times 1.1 times thermal conductivity 1,428 1,493 1,409 1,434 1,438
- Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 half width 43 42 45 31 f c 0.01 0.03 0.03 0.25 ⁇ 0 90,490 144,339 137,025 52,500 % (s) 24 18 22 18 Equation 1 5 88 16 39 Mw 93,349 183,058 137,746 153,878 ⁇ 1 7,543 14,808 5,156 12,474 t( ⁇ 2 ) 162 276 57 267 Equation 2 47 54 90 47 gel film formed or not ⁇ ⁇ ⁇ draw ratio Cannot be stretched Cannot be stretched Cannot be stretched 2.0 times thermal conductivity 1,310 1,227 1,284 1,292
- the present invention has the effect of providing a polyimide film for a graphite sheet and a graphite sheet having excellent thermal conductivity.
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Abstract
Description
실시예 1 | 실시예 2 | 실시예 3 | 실시예 4 | 실시예 5 | |
반치폭 | 37 | 33 | 30 | 32 | 36 |
fc | 0.06 | 0.11 | 0.20 | 0.16 | 0.08 |
η0 | 289,340 | 139,940 | 52,500 | 140,335 | 142,960 |
%(s) | 25 | 22 | 18 | 22 | 22 |
식 1 | 10 | 17 | 39 | 17 | 17 |
Mw | 118,611 | 136,534 | 153,878 | 130,025 | 133,579 |
η1 | 9,580 | 11,027 | 12,474 | 10,809 | 7,556 |
t(η2) | 175 | 198 | 267 | 366 | 102 |
식 2 | 55 | 56 | 47 | 30 | 74 |
겔 필름 형성 여부 |
○ | ○ | ○ | ○ | ○ |
연신비 | 1.1배 | 1.3배 | 1.5배 | 1.4배 | 1.1배 |
열전도도 | 1,428 | 1,493 | 1,409 | 1,434 | 1,438 |
비교예 1 | 비교예 2 | 비교예 3 | 비교예 4 | |
반치폭 | 43 | 42 | 45 | 31 |
fc | 0.01 | 0.03 | 0.03 | 0.25 |
η0 | 90,490 | 144,339 | 137,025 | 52,500 |
%(s) | 24 | 18 | 22 | 18 |
식 1 | 5 | 88 | 16 | 39 |
Mw | 93,349 | 183,058 | 137,746 | 153,878 |
η1 | 7,543 | 14,808 | 5,156 | 12,474 |
t(η2) | 162 | 276 | 57 | 267 |
식 2 | 47 | 54 | 90 | 47 |
겔 필름 형성 여부 |
○ | ○ | ○ | ○ |
연신비 | 연신 불가 | 연신 불가 | 연신 불가 | 2.0배 |
열전도도 | 1,310 | 1,227 | 1,284 | 1,292 |
Claims (15)
- 제1항에 있어서,상기 폴리이미드 필름은 폴리아믹산 용액으로부터 형성된 연신된 겔 필름으로부터 유도된 것인, 그라파이트 시트용 폴리이미드 필름.
- 제2항에 있어서,상기 연신된 겔 필름은 겔 필름이 MD(machine direction)로 1.01배 내지 1.5배의 비율로 연신된 것인, 그라파이트 시트용 폴리이미드 필름.
- 제2항에 있어서,상기 폴리아믹산의 중량평균분자량은 100,000g/mol 내지 170,000g/mol이고,상기 폴리아믹산 용액은 용매 중에 이무수물 단량체 및 디아민 단량체를 반응시켜 제조되되, 하기 식 2를 만족하는 것인, 그라파이트 시트용 폴리이미드 필름:<식 2>상기 식 2 중, η0은 폴리아믹산 용액의 점도(23℃, 단위: cps)이고, %(s)는 폴리아믹산 용액의 고형분 함량으로서 디아민 단량체, 이무수물 단량체 및 용매의 총 중량에 대한 디아민 단량체 및 이무수물 단량체의 중량 백분율(단위: 중량%)이고, e는 자연상수이다.
- 제4항에 있어서,상기 식 2 중, η0은 50,000cps 내지 300,000cps이고, %(s)는 15중량% 내지 30중량%인, 그라파이트 시트용 폴리이미드 필름.
- 제4항에 있어서,상기 디아민 단량체는 4,4'-옥시디아닐린(4,4'-oxydianiline), p-페닐디아민(p-phenylene diamine), 또는 이들의 조합을 포함하고,상기 이무수물 단량체는 피로멜리트산 이무수물(pyromellitic dianhydride)을 포함하는, 그라파이트 시트용 폴리이미드 필름.
- 제7항에 있어서,상기 식 3 중, η1은 2,500cps 내지 30,000cps이고, t(η2)는 100초 내지 400초인, 그라파이트 시트용 폴리이미드 필름.
- 제7항에 있어서,상기 촉매 조성물은 이미드화제, 탈수제, 승화성 무기 충전제 및 용매를 포함하는 것인, 그라파이트 시트용 폴리이미드 필름.
- 제9항에 있어서,상기 촉매 조성물은,3중량% 내지 15중량%의 상기 이미드화제;30중량% 내지 70중량%의 상기 탈수제;0.01중량% 내지 0.5중량%의 상기 승화성 무기 충전제; 및잔량의 상기 용매를 포함하는 것인, 그라파이트 시트용 폴리이미드 필름.
- 제7항에 있어서,상기 촉매 조성물은 상기 폴리아믹산 용액 100중량부당 30중량부 내지 60중량부로 첨가되는 것인, 그라파이트 시트용 폴리이미드 필름.
- 제7항에 있어서,상기 건조는 30℃ 내지 200℃의 온도에서 15초 내지 30분 동안 수행된 것인, 그라파이트 시트용 폴리이미드 필름 제조방법.
- 제2항에 있어서,상기 폴리이미드 필름은 연신된 겔 필름을 250℃ 내지 600℃의 온도에서 30초 내지 40분 동안 열처리하여 제조된 것인, 그라파이트 시트용 폴리이미드 필름.
- 제1항 내지 제13항 중 어느 한 항의 그라파이트 시트용 폴리이미드 필름을 탄화 및 흑연화하여 제조한 그라파이트 시트.
- 제14항에 있어서,상기 그라파이트 시트는 두께가 10㎛ 내지 100㎛이고, 열전도도가 1,400W/m·K 이상인, 그라파이트 시트.
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JP2013189517A (ja) * | 2012-03-13 | 2013-09-26 | Du Pont-Toray Co Ltd | ポリイミドフィルムの製造方法およびポリイミドフィルム |
KR101883434B1 (ko) * | 2018-01-30 | 2018-07-31 | 에스케이씨코오롱피아이 주식회사 | 그라파이트 시트용 폴리이미드 필름, 이를 이용하여 제조된 그라파이트 시트 및 그라파이트 시트의 제조방법 |
KR20190102561A (ko) * | 2018-02-26 | 2019-09-04 | 에스케이씨코오롱피아이 주식회사 | 구형의 pi계 필러를 포함하는 그라파이트 시트용 폴리이미드 필름, 이의 제조방법 및 이를 이용하여 제조되는 그라파이트 시트 |
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KR101883434B1 (ko) * | 2018-01-30 | 2018-07-31 | 에스케이씨코오롱피아이 주식회사 | 그라파이트 시트용 폴리이미드 필름, 이를 이용하여 제조된 그라파이트 시트 및 그라파이트 시트의 제조방법 |
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