JPH0476073B2 - - Google Patents
Info
- Publication number
- JPH0476073B2 JPH0476073B2 JP24239684A JP24239684A JPH0476073B2 JP H0476073 B2 JPH0476073 B2 JP H0476073B2 JP 24239684 A JP24239684 A JP 24239684A JP 24239684 A JP24239684 A JP 24239684A JP H0476073 B2 JPH0476073 B2 JP H0476073B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- bisallyl carbonate
- glycol bisallyl
- general formula
- solid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- -1 alkylene glycol Chemical compound 0.000 claims description 24
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 20
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 17
- 125000004432 carbon atom Chemical group C* 0.000 claims description 13
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 13
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 12
- 229920006037 cross link polymer Polymers 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 8
- 125000002947 alkylene group Chemical group 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 125000000547 substituted alkyl group Chemical group 0.000 claims description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 description 17
- 238000006116 polymerization reaction Methods 0.000 description 14
- 239000000178 monomer Substances 0.000 description 13
- 239000002245 particle Substances 0.000 description 12
- 238000003486 chemical etching Methods 0.000 description 11
- SYFOAKAXGNMQAX-UHFFFAOYSA-N bis(prop-2-enyl) carbonate;2-(2-hydroxyethoxy)ethanol Chemical compound OCCOCCO.C=CCOC(=O)OCC=C SYFOAKAXGNMQAX-UHFFFAOYSA-N 0.000 description 10
- 238000005530 etching Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- 125000000217 alkyl group Chemical group 0.000 description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 4
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000000020 Nitrocellulose Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920001220 nitrocellulos Polymers 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000007870 radical polymerization initiator Substances 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 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 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- 125000005250 alkyl acrylate group Chemical group 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000003505 polymerization initiator Substances 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 description 2
- 238000000045 pyrolysis gas chromatography Methods 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- XFMDETLOLBGJAX-UHFFFAOYSA-N 2-methylideneicosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCC(=C)C(O)=O XFMDETLOLBGJAX-UHFFFAOYSA-N 0.000 description 1
- DJDGWVCBUNYBOO-UHFFFAOYSA-N 2-methylideneoctanoic acid Chemical compound CCCCCCC(=C)C(O)=O DJDGWVCBUNYBOO-UHFFFAOYSA-N 0.000 description 1
- RDBNAQJXOYZUFL-UHFFFAOYSA-N 2-methylidenetetradecanoic acid Chemical compound CCCCCCCCCCCCC(=C)C(O)=O RDBNAQJXOYZUFL-UHFFFAOYSA-N 0.000 description 1
- FXTXRXXCMFFRTL-UHFFFAOYSA-N 4-ethyl-2-methylideneoctanoic acid Chemical compound CCCCC(CC)CC(=C)C(O)=O FXTXRXXCMFFRTL-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 229910052686 Californium Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010504 bond cleavage reaction Methods 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- HGLDOAKPQXAFKI-UHFFFAOYSA-N californium atom Chemical compound [Cf] HGLDOAKPQXAFKI-UHFFFAOYSA-N 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 125000001196 nonadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 description 1
- 229920002432 poly(vinyl methyl ether) polymer Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000009 pyrolysis mass spectrometry Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
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[Industrial Field of Application] The present invention relates to a solid state track detector. More specifically, the surface of the molded product is chemically etched to form a latent image formed by bombardment of elementary particles such as neutrons on the surface of the molded product, using an alkylene glycol bisacrylic carbonate copolymer with a specified composition ratio as a material. The present invention relates to a solid-state track detector that can be observed as a clear visible image. [Prior Art] When a polymeric material is used in a solid-state track detector, scission of the polymer molecular chains occurs along the path of the charged particles, forming a latent image. For example, when a solid-state detector exposed to charged particles is subjected to chemical etching treatment such as alkaline treatment, this latent image becomes visible as an etch bit.
By microscopically observing and analyzing the size or depth, etc., it is possible to determine the presence of charged particles, their strength, or the charged particles. Conventionally, typical polymer materials for solid-state track detectors are cellulose nitrate polycarbonate, diethylene glycol bisallyl carbonate homopolymer (trade name CR-39), or a mixture of CR-39 and a small amount of dioctyl phthalate. (Physics Today, 1981,
(See September, pages 32-39) Of the above, polycarbonate is known to have rough and uneven surfaces, and cellulose nitrate has a rough surface and a fading phenomenon. [Problems to be Solved by the Invention] A polymer of diethylene glycol bisallyl carbonate is superior to polycarbonate and cellulose nitrate as a material for solid-state track detectors, and is capable of forming etchipits better. However, because polymer chains of diethylene glycol bisallyl carbonate are cut by chemical etching, there is a drawback that, in addition to etching pits, background holes unrelated to the tracks of charged particles are produced on the surface after chemical etching. be. That is, the smoothness of the surface of the material is lost due to the generation of background holes, and the transparency or light transmittance is reduced due to diffuse reflection of light, making it difficult to identify the etching pit. On the other hand, it is disclosed in the above-mentioned Physics Today that a mixture of a polymer of diethylene glycol bisallyl carbonate and a small amount of dioctyl phthalate has improved optical properties of an etchipite required as a solid-state track detector. An object of the present invention is to provide a solid-state track detector that can detect tracks of neutron-charged particles and the like with high sensitivity. Another object of the present invention is to provide a solid state track detector that does not suffer from loss of surface smoothness due to the formation of back ground holes due to chemical etching. Still another object of the present invention is to provide a copolymer of diethylene glycol bisallyl carbonate having a specified copolymerization composition as a material for achieving the above objects. Further objects and advantages of the invention will become apparent from the description below. [Means for Solving the Problems] According to the present invention, such objects and advantages of the present invention are achieved by the following general formula () (Here, R 1 is an alkylene group having 2 to 6 carbon atoms, and n is an integer of 1 to 6.) A polymerization unit derived from alkylene glycol bisallyl carbonate represented by the following general formula () (Here, R 2 is a hydrogen atom or a methyl group,
R 3 is an unsubstituted or substituted alkyl group having 6 to 20 carbon atoms. ) A crosslinked polymer consisting essentially of a polymerized unit derived from an acrylic acid alkyl ester or a methacrylic acid alkyl ester represented by The polymerization unit is 0.5 to this crosslinked copolymer.
This is achieved using a sheet-shaped solid-state track detector containing 3 mol % and having a thickness of 0.05 to 10 mm. In the crosslinked copolymer used in the solid-state track detector of the present invention, the polymer comprises a polymer unit derived from alkylene glycol bisallyl carbonate of the above formula () and an acrylic acid alkyl ester or methacrylic acid alkyl ester of the above formula (). It is extremely important that the crosslinked polymer consists essentially of polymerized units derived from the monomer of the above formula (), and that the polymerized units derived from the monomer of the above formula () account for 0.5 to 3 mol% of the crosslinked polymer. This is because, as will be described later, a crosslinked copolymer that does not satisfy either one or both of these two conditions cannot achieve the object of the present invention. The alkylene glycol bisallyl carbonate used in the present invention is represented by the above general formula.
In the general formula (), R 1 is an alkylene group having 2 to 6 carbon atoms, and n is an integer of 1 to 6. Examples of the alkylene group having 2 to 6 carbon atoms include ethylene, 1,2- or 1,3-propylene, 1,4-
Examples include butylene, 1,5-pentylene and 1,6-hexylene. R 1 is preferably an alkylene group having 2 to 4 carbon atoms, and n is preferably 1 or 2. Preferred examples of the alkylene glycol bisallyl carbonate include ethylene glycol bisallyl carbonate, 1,2- or 1,3-propylene glycol, diethylene glycol bisallyl carbonate, dipropylene glycol bisallyl carbonate, and dibutylene glycol bisallyl carbonate. It can also be given as Among these, ethylene glycol bisallyl carbonate, 1,2- or 1,3-propylene glycol bisallyl carbonate, diethylene glycol bisallyl carbonate and dipropylene glycol bisallyl carbonate are particularly preferred. The alkyl acrylate or alkyl methacrylate used in the present invention is specified by the above general formula (). In the general formula (), R 2 is a hydrogen atom or a methyl group, and R 3 is an unsubstituted or substituted alkyl group having 6 to 20 carbon atoms. The unsubstituted alkyl group having 6 to 20 carbon atoms in R 3 is hexyl, heptyl, octyl, nonyl,
Decyl, undecyl, dodecyl, tridecyl, pentadecyl, hexa-decyl, heptadecyl, octadecyl, nonadecyl, and eicodecyl, which may be linear or branched. These alkyl groups can be substituted. Such a substituent can be present as a substituent on at least one hydrogen of an alkyl group, for example a halogen atom such as chlorine, bromine, iodine, fluorine; a carbon atom having 1 to 4 carbon atoms such as methoxy, ethoxy, propoxy, butoxy. lower alkoxy group,
Alternatively, a phenoxy group or the like can be mentioned as a preferable group. As the acrylic acid alkyl ester or methacrylic acid alkyl ester, the above general formula () is used.
Depending on the definition of R3 , preferred examples include hexyl acrylic acid or methacrylate, 2-ethylhexyl acrylic acid or methacrylate, n-dodecyl acrylic acid or methacrylate, and stearyl acrylic acid or methacrylate. When the number of carbon atoms in the alkyl group of R 3 is less than 6, the crosslinked copolymer loses its transparency to a large extent after chemical etching treatment, making it impossible to achieve the object of the present invention. Furthermore, if the number of carbon atoms in the alkyl group of R 3 is 20, the compatibility with alkylene glycol bisallyl carbonate decreases when producing a crosslinked copolymer, making it difficult to mix uniformly, and resulting in a smooth surface. It is not possible to obtain a crosslinked copolymer with As the acrylic acid alkyl ester or methacrylic acid alkyl ester used in the present invention, in particular, in the general formula (), R 3 has a carbon number of 8
~18 unsubstituted or substituted alkyl groups are preferred. The crosslinked copolymer used in the present invention essentially consists of polymerized units of alkylene glycol bisallyl carbonate of the above general formula () and polymerized units of acrylic acid alkyl ester or methacrylic acid alkyl ester of the above general formula (), Moreover, the polymerized units from the monomers of the above general formula () must account for 0.5 to 3 mol% of the copolymer. If the proportion of polymerized units derived from the acrylic monomer of the general formula () above is less than 0.5 mol%, background holes may be generated on the surface by chemical etching, resulting in a significant loss of transparency. It cannot be used as a solid-state track detector because it gives an object. Furthermore, if the proportion of polymerized units derived from the acrylic monomer of the above general formula () exceeds 3 mol %, the sensitivity to formation of ettip pits by neutrons, charged particles, etc. decreases, which is undesirable. As mentioned above, in the present invention, the acrylic monomer of the polymerized unit constituting the crosslinked copolymer has an unsubstituted or substituted alkyl group having 6 to 20 carbon atoms as shown in the above general formula (), and It is extremely important that the crosslinked copolymer contains 0.5 to 3 mol% of polymerized units derived from the acrylic monomer. This will be clearly understood from concrete data in Examples described below. The crosslinked polymer forming the solid state track detector of the present invention is usually provided in sheet form and is used as a solid state track detector in sheet form. The crosslinked polymer used in the present invention can broadly include copolymers containing 50% by weight or more of alkylene glycol bisallyl carbonate, which are described in Japanese Patent Publication No. 31484/1984 as resins for the outer layer of tooth veneers or jacket crowns. included in the meaning. However, the publication of Japanese Patent Publication No. 59-31484 does not specifically describe the crosslinked copolymer having the composition of the present invention.
Of course, nothing has been done about solid-state track detectors. The crosslinked copolymer used in the present invention can be produced by a method known per se. To illustrate a typical method suitably employed, an alkylene glycol bisallyl carbonate containing a radical initiator represented by the general formula () is placed between molds held by an elastomer gasket or a spacer. A crosslinked polymer can be directly obtained as a sheet by injecting a mixed solution with an acrylic acid alkyl ester or a methacrylic acid alkyl ester shown in parentheses, curing and polymerizing it in an air oven, and then taking it out. In general, it is preferable to carry out the so-called two-stage polymerization in which polymerization is started slowly at a relatively low temperature and then cured at a high temperature when the polymerization is completed. For example, it is preferable to polymerize slowly at room temperature to about 70°C and then complete the polymerization at a high temperature of about 80 to 120°C, since no distortion remains in the sheet. In addition, prior to mixing the above raw material compounds, a portion of alkylene glycol bisallyl carbonate is added to
It can also be used by partially polymerizing ~20%, and after prepolymerizing a mixture of copolymer monomers in the presence of a polymerization initiator to increase the viscosity of the mixture, Type polymerization is also possible. The above-mentioned radical polymerization initiator is not particularly limited, and known ones can be used. Examples include common radical polymerization initiators such as diisopropyl peroxydicarbonate, azobisisobutyronitrile, and benzoyl peroxide. The amount of the radical polymerization initiator used varies depending on the polymerization type, polymerization conditions, type of monomer in the polymerization component, etc., and cannot be generally limited, but it is generally 0.01 to 10% by weight based on the total monomers. It is most preferable to use the range. In addition, during the polymerization, release agents, ultraviolet absorbers, antioxidants, color inhibitors, antistatic agents, fluorescent dyes, and other various stabilizers or other additives may be added as necessary. can do. Confirmation of the above-mentioned various polymerized units in the copolymer consisting of polymerized units derived from the raw materials represented by the general formula () and the same () constituting the solid-state track detector of the present invention can be carried out by known methods. . In general
It can be carried out using FTIR spectrometer, 13 C NMR, pyrolysis gas chromatography and mass spectrometry, pyrolysis gas chromatography, etc. The sheet obtained by the polymerization can be used as it is as a solid-state track detector, or it can be fitted into a frame and used, for example, as a batch. Generally, when the sheet is used to measure charged particles, it can be used as it is by placing it in a place where charged particles are present. Furthermore, when measuring neutrons, since neutrons have no charge, it is not possible to directly form a clear latent image on the sheet, so generally a film or sheet that generates protons when irradiated with neutrons is used to surface the sheet. It is used with the coated surface facing the neutron irradiation. The film or sheet used for the above-mentioned coating is made of a polymer material having carbon and hydrogen bonds. For example, the material may be polyethylene, polypropylene, polyisobutylene, polyisoprene, polyvinyl methyl ether, polyacrylonitrile, polyethylene terephthalate, polyvinyl alcohol, polystyrene, polycaprolactam, poly(meth)acrylic methyl ether, or the like. The thickness of the sheet made of the crosslinked polymer constituting the solid-state track detector of the present invention is selected from the range of 0.05 to 10 mm. [Effect] The solid-state track detector of the present invention generates a latent image sensitively to neutrons or charged particles. However, since the formation of the latent image cannot be observed as it is,
In general, a method is used in which a solid-state track detector that has generated a latent image is subjected to chemical etching treatment, such as alkali etching treatment such as caustic soda or caustic potash, and then confirmed using a microscope (photograph) as an etch pit that appears on the sheet surface after the chemical etching treatment. Suitably adopted. The solid-state track detector of the present invention not only forms a latent image formed by the above-mentioned neutrons and charged particles with extremely high sensitivity, but also has a smooth surface even after chemical etching. The etching pits formed by the marks are clearly marked. Moreover, the sheet after the chemical etching treatment has the characteristic that its transparency is hardly impaired, as will be clear from the examples described later. Because of these excellent features, the SSTD of the present invention is an excellent product that almost completely eliminates the deficiencies that conventional solid-state track detectors were required to improve. [Examples] In order to explain the present invention more specifically, Examples and corresponding comparative examples are shown below, but the present invention is not limited to these Examples. In addition, in the examples and comparative examples, the test piece (sheet)
Preparation, chemical etching treatment, and measurement of transparency were performed based on the following methods. âSheet manufacturing method The sample sheet was manufactured by cast polymerization.
Two pieces of tempered glass with a size of 200 x 200 m/m and a thickness of 8 m/m are used, a silicone gasket with a slit for injection with a thickness of 1.7 m/m is sandwiched between them, and the periphery is fixed with binder clips to form a cell. I made it. After mixing the raw material monomer with the raw material monomer, deaerate it for 1 minute at 1 to 2 torr using a vacuum pump and filter it through a 0.45Ό filter (Toyo Menran Filter TYPE).
TM-2P) was used for filtration and deaeration. The monomer was injected through the injection port of the cell and slowly polymerized at 40°C to 90°C over 24 hours in open air. After polymerization, the mold was released and post-cured at 100°C for 1 hour to obtain a sheet with a thickness of 1.6 m/m. âTransparency measurement The etched sheet was measured using a spectrophotometer (Hitachi
The transmittance in the ultraviolet region of 530 mm was measured using a spectrophotometer (Model 323). Example 1 Diethylene glycol bisallyl carbonate (TS-16; trade name, manufactured by Tokuyama Soda Co., Ltd.) 98.75% by weight, methacrylic acid alkyl ester shown in Table 1
After adding 2.8 parts by weight of diisopropyl peroxydicarbonate as a polymerization initiator to 100 parts by weight of a composition consisting of 1.25% by weight and stirring for 1 hour,
A sheet was made according to the sheet manufacturing method described above. The surface of this sheet was covered with a polyethylene sheet having a thickness of 0.9 mm. The surface covered with this polyethylene sheet was irradiated with neutrons emitted from 252 cf (californium). Then, use the above sheet
Etching treatment was performed by immersing it in a 5.2N-NaOH aqueous solution at 60°C for 18 hours. Thereafter, the number of etching pits per unit area (cm 2 ) of the surface of this sheet was calculated from a micrograph (300x magnification). Note that the calculation of the above-mentioned etching pits was carried out without adding to the number of etching pits where it was difficult to distinguish between etching pits and back ground holes. The results were as shown in Table 1. In addition,
M/M+A (mol %) in Table 1 indicates the content ratio of methacrylic acid alkyl ester (M) to diethylene glycol bisallyl carbonate (A).
ãè¡šããtableã
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ãã§ãã€ãã[Table] Table 2 also shows the results of measuring the transmittance of each sheet before and after etching treatment.
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ã第ïŒè¡šã«ç€ºãã[Table] *Nos. 1 to 4 in Tables 1 and 2 are comparative examples.
Example 2 The same method as No. 8 in Table 1 of Example 1 was carried out except that alkylene glycol bisallyl carbonate was used instead of diethylene glycol bisallyl carbonate used in Example 1. The results are shown in Table 3.
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ã®çµæã¯ç¬¬ïŒè¡šã«ç€ºãéãã§ãã€ãã[Table] Example 3 Methacrylic acid n in Table 1 No. 8 of Example 1
- The same procedure as in Example 1 was carried out except that the blending ratio of dodecyl ester was changed as shown in Table 4. The results were as shown in Table 4.
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æã¯ç¬¬ïŒè¡šã«ç€ºãéãã§ãã€ãã[Table] Example 4 The same procedure as in Example 1 was carried out except that the alkyl acrylate shown in Table 5 was used instead of the alkyl methacrylate in Example 1. The results were as shown in Table 5.
Claims (1)
ã§ãããïœã¯ïŒãïŒã®æŽæ°ã§ããïŒã§è¡šããã
ã¢ã«ãã¬ã³ã°ãªã³ãŒã«ãã¹ã¢ãªã«ã«ãŒãããŒã
ããå°ãããéååäœãš  äžèšäžè¬åŒïŒïŒ ïŒããã§ãR2ã¯æ°ŽçŽ ååãŸãã¯ã¡ãã«åºã§ã
ããR3ã¯ççŽ æ°ïŒã20ã®é眮æãããã¯çœ®æ
ã®ã¢ã«ãã«åºã§ããïŒ ã§è¡šãããã¢ã¯ãªã«é žã¢ã«ãã«ãšã¹ãã«ãŸãã¯ã¡
ã¿ã¯ãªã«é žã¢ã«ãã«ãšã¹ãã«ããå°ãããéåäœ
åäœãšããå®è³ªçã«ãªãæ¶æ©éåäœã§ãããäžã€
äžèšïŒïŒã§è¡šãããã¢ã¯ãªã«é žã¢ã«ãã«ãšã¹ã
ã«ãŸãã¯ãã¡ã¿ã¯ãªã«é žã¢ã«ãã«ãšã¹ãã«ããå°
ãããéååäœãããã®æ¶æ©éåäœã«å¯Ÿã0.3ã
ïŒã¢ã«ïŒ ã®å²åã§å«æãããåã¿ã0.05ã10mmã®
ã·ãŒãç¶ãããåºäœé£è·¡æ€åºåšã[Claims] 1 A The following general formula () (Here, R 1 is an alkylene group having 2 to 6 carbon atoms, and n is an integer of 1 to 6.) A polymerized unit derived from alkylene glycol bisallyl carbonate and B the following general formula () (Here, R 2 is a hydrogen atom or a methyl group, and R 3 is an unsubstituted or substituted alkyl group having 6 to 20 carbon atoms.) A crosslinked polymer consisting essentially of a polymer unit, and a polymer unit derived from an acrylic acid alkyl ester or a methacrylic acid alkyl ester represented by the above () is 0.3 to 0.3 to
A solid track detector in the form of a sheet with a thickness of 0.05 to 10 mm, containing 3 mol%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24239684A JPS61120989A (en) | 1984-11-19 | 1984-11-19 | Solid track detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24239684A JPS61120989A (en) | 1984-11-19 | 1984-11-19 | Solid track detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61120989A JPS61120989A (en) | 1986-06-09 |
| JPH0476073B2 true JPH0476073B2 (en) | 1992-12-02 |
Family
ID=17088525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24239684A Granted JPS61120989A (en) | 1984-11-19 | 1984-11-19 | Solid track detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61120989A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2584547B2 (en) * | 1991-05-13 | 1997-02-26 | æ ªåŒäŒç€Ÿãã㯠| Electronic cash register |
-
1984
- 1984-11-19 JP JP24239684A patent/JPS61120989A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61120989A (en) | 1986-06-09 |
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