JP5241548B2 - ポリ乳酸樹脂組成物およびその製造方法 - Google Patents
ポリ乳酸樹脂組成物およびその製造方法 Download PDFInfo
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- JP5241548B2 JP5241548B2 JP2009027213A JP2009027213A JP5241548B2 JP 5241548 B2 JP5241548 B2 JP 5241548B2 JP 2009027213 A JP2009027213 A JP 2009027213A JP 2009027213 A JP2009027213 A JP 2009027213A JP 5241548 B2 JP5241548 B2 JP 5241548B2
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- Prior art keywords
- lactic acid
- poly
- resin composition
- mol
- polylactic acid
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- 229920000747 poly(lactic acid) Polymers 0.000 title claims description 75
- 239000004626 polylactic acid Substances 0.000 title claims description 75
- 239000011342 resin composition Substances 0.000 title claims description 53
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 229920000106 Liquid crystal polymer Polymers 0.000 claims description 65
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 claims description 65
- JVTAAEKCZFNVCJ-UWTATZPHSA-N D-lactic acid Chemical compound C[C@@H](O)C(O)=O JVTAAEKCZFNVCJ-UWTATZPHSA-N 0.000 claims description 64
- 229920001432 poly(L-lactide) Polymers 0.000 claims description 54
- 229940022769 d- lactic acid Drugs 0.000 claims description 51
- 239000013078 crystal Substances 0.000 claims description 45
- 229930182843 D-Lactic acid Natural products 0.000 claims description 40
- -1 carbodiimide compound Chemical class 0.000 claims description 29
- 238000002844 melting Methods 0.000 claims description 27
- 230000008018 melting Effects 0.000 claims description 27
- 150000001875 compounds Chemical class 0.000 claims description 23
- 238000004898 kneading Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 22
- 238000002156 mixing Methods 0.000 claims description 19
- JVTAAEKCZFNVCJ-REOHCLBHSA-N L-lactic acid Chemical group C[C@H](O)C(O)=O JVTAAEKCZFNVCJ-REOHCLBHSA-N 0.000 claims description 17
- 239000003484 crystal nucleating agent Substances 0.000 claims description 17
- 125000003118 aryl group Chemical group 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 229920000728 polyester Polymers 0.000 claims description 11
- 239000004973 liquid crystal related substance Substances 0.000 claims description 9
- 239000004593 Epoxy Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 239000007790 solid phase Substances 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000008025 crystallization Effects 0.000 claims description 2
- 238000010128 melt processing Methods 0.000 claims 1
- 229920000642 polymer Polymers 0.000 description 26
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 24
- 239000000178 monomer Substances 0.000 description 22
- 239000000047 product Substances 0.000 description 20
- 229920001577 copolymer Polymers 0.000 description 13
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 12
- 239000004310 lactic acid Substances 0.000 description 12
- 235000014655 lactic acid Nutrition 0.000 description 12
- 239000012071 phase Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- FJKROLUGYXJWQN-UHFFFAOYSA-N 4-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 9
- 239000002253 acid Substances 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 241000790917 Dioxys <bee> Species 0.000 description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000155 melt Substances 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 8
- 238000004736 wide-angle X-ray diffraction Methods 0.000 description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 7
- 125000000217 alkyl group Chemical group 0.000 description 7
- 150000002148 esters Chemical class 0.000 description 7
- 239000012298 atmosphere Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 125000003700 epoxy group Chemical group 0.000 description 6
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 6
- 239000002028 Biomass Substances 0.000 description 5
- 125000001931 aliphatic group Chemical group 0.000 description 5
- 125000003545 alkoxy group Chemical group 0.000 description 5
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000010408 film Substances 0.000 description 5
- 150000004820 halides Chemical class 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000000454 talc Substances 0.000 description 5
- 229910052623 talc Inorganic materials 0.000 description 5
- 229940090248 4-hydroxybenzoic acid Drugs 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical class [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000011256 inorganic filler Substances 0.000 description 4
- 229910003475 inorganic filler Inorganic materials 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000012766 organic filler Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- KAUQJMHLAFIZDU-UHFFFAOYSA-N 6-Hydroxy-2-naphthoic acid Chemical compound C1=C(O)C=CC2=CC(C(=O)O)=CC=C21 KAUQJMHLAFIZDU-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000005711 Benzoic acid Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- VCCBEIPGXKNHFW-UHFFFAOYSA-N biphenyl-4,4'-diol Chemical group C1=CC(O)=CC=C1C1=CC=C(O)C=C1 VCCBEIPGXKNHFW-UHFFFAOYSA-N 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CWLKGDAVCFYWJK-UHFFFAOYSA-N 3-aminophenol Chemical compound NC1=CC=CC(O)=C1 CWLKGDAVCFYWJK-UHFFFAOYSA-N 0.000 description 2
- IJFXRHURBJZNAO-UHFFFAOYSA-N 3-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=CC(O)=C1 IJFXRHURBJZNAO-UHFFFAOYSA-N 0.000 description 2
- ALYNCZNDIQEVRV-UHFFFAOYSA-N 4-aminobenzoic acid Chemical compound NC1=CC=C(C(O)=O)C=C1 ALYNCZNDIQEVRV-UHFFFAOYSA-N 0.000 description 2
- PLIKAWJENQZMHA-UHFFFAOYSA-N 4-aminophenol Chemical compound NC1=CC=C(O)C=C1 PLIKAWJENQZMHA-UHFFFAOYSA-N 0.000 description 2
- BCEQKAQCUWUNML-UHFFFAOYSA-N 4-hydroxybenzene-1,3-dicarboxylic acid Chemical compound OC(=O)C1=CC=C(O)C(C(O)=O)=C1 BCEQKAQCUWUNML-UHFFFAOYSA-N 0.000 description 2
- QNVNLUSHGRBCLO-UHFFFAOYSA-N 5-hydroxybenzene-1,3-dicarboxylic acid Chemical compound OC(=O)C1=CC(O)=CC(C(O)=O)=C1 QNVNLUSHGRBCLO-UHFFFAOYSA-N 0.000 description 2
- OZJPLYNZGCXSJM-UHFFFAOYSA-N 5-valerolactone Chemical compound O=C1CCCCO1 OZJPLYNZGCXSJM-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 208000010444 Acidosis Diseases 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 125000004018 acid anhydride group Chemical group 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000007950 acidosis Effects 0.000 description 2
- 208000026545 acidosis disease Diseases 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 150000004984 aromatic diamines Chemical class 0.000 description 2
- 229920002988 biodegradable polymer Polymers 0.000 description 2
- 239000004621 biodegradable polymer Substances 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- FIASKJZPIYCESA-UHFFFAOYSA-L calcium;octacosanoate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCCCCCCCCCCCC([O-])=O FIASKJZPIYCESA-UHFFFAOYSA-L 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 229910052570 clay Inorganic materials 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- RXOHFPCZGPKIRD-UHFFFAOYSA-N naphthalene-2,6-dicarboxylic acid Chemical compound C1=C(C(O)=O)C=CC2=CC(C(=O)O)=CC=C21 RXOHFPCZGPKIRD-UHFFFAOYSA-N 0.000 description 2
- PLDDOISOJJCEMH-UHFFFAOYSA-N neodymium(3+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Nd+3].[Nd+3] PLDDOISOJJCEMH-UHFFFAOYSA-N 0.000 description 2
- BKIMMITUMNQMOS-UHFFFAOYSA-N nonane Chemical compound CCCCCCCCC BKIMMITUMNQMOS-UHFFFAOYSA-N 0.000 description 2
- 229920003986 novolac Polymers 0.000 description 2
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229960001755 resorcinol Drugs 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- YKIBJOMJPMLJTB-UHFFFAOYSA-M sodium;octacosanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCCCCCCCCCCCC([O-])=O YKIBJOMJPMLJTB-UHFFFAOYSA-M 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 125000003396 thiol group Chemical class [H]S* 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- HZVFRKSYUGFFEJ-YVECIDJPSA-N (2r,3r,4s,5r)-7-phenylhept-6-ene-1,2,3,4,5,6-hexol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=CC1=CC=CC=C1 HZVFRKSYUGFFEJ-YVECIDJPSA-N 0.000 description 1
- KAKVFSYQVNHFBS-UHFFFAOYSA-N (5-hydroxycyclopenten-1-yl)-phenylmethanone Chemical compound OC1CCC=C1C(=O)C1=CC=CC=C1 KAKVFSYQVNHFBS-UHFFFAOYSA-N 0.000 description 1
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 1
- FRASJONUBLZVQX-UHFFFAOYSA-N 1,4-dioxonaphthalene Natural products C1=CC=C2C(=O)C=CC(=O)C2=C1 FRASJONUBLZVQX-UHFFFAOYSA-N 0.000 description 1
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 1
- BOKGTLAJQHTOKE-UHFFFAOYSA-N 1,5-dihydroxynaphthalene Chemical compound C1=CC=C2C(O)=CC=CC2=C1O BOKGTLAJQHTOKE-UHFFFAOYSA-N 0.000 description 1
- YFOOEYJGMMJJLS-UHFFFAOYSA-N 1,8-diaminonaphthalene Chemical compound C1=CC(N)=C2C(N)=CC=CC2=C1 YFOOEYJGMMJJLS-UHFFFAOYSA-N 0.000 description 1
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- QCHZUINRDLKKJX-UHFFFAOYSA-N 1-n,3-n,5-n-tritert-butylbenzene-1,3,5-tricarboxamide Chemical compound CC(C)(C)NC(=O)C1=CC(C(=O)NC(C)(C)C)=CC(C(=O)NC(C)(C)C)=C1 QCHZUINRDLKKJX-UHFFFAOYSA-N 0.000 description 1
- MXHDSBYJGVZESK-UHFFFAOYSA-N 1-n,4-n-diphenylbenzene-1,4-dicarboxamide Chemical compound C=1C=C(C(=O)NC=2C=CC=CC=2)C=CC=1C(=O)NC1=CC=CC=C1 MXHDSBYJGVZESK-UHFFFAOYSA-N 0.000 description 1
- KJCVRFUGPWSIIH-UHFFFAOYSA-N 1-naphthol Chemical compound C1=CC=C2C(O)=CC=CC2=C1 KJCVRFUGPWSIIH-UHFFFAOYSA-N 0.000 description 1
- MVOSYKNQRRHGKX-UHFFFAOYSA-N 11-Undecanolactone Chemical compound O=C1CCCCCCCCCCO1 MVOSYKNQRRHGKX-UHFFFAOYSA-N 0.000 description 1
- QFGCFKJIPBRJGM-UHFFFAOYSA-N 12-[(2-methylpropan-2-yl)oxy]-12-oxododecanoic acid Chemical compound CC(C)(C)OC(=O)CCCCCCCCCCC(O)=O QFGCFKJIPBRJGM-UHFFFAOYSA-N 0.000 description 1
- RDYWHMBYTHVOKZ-UHFFFAOYSA-N 18-hydroxyoctadecanamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCO RDYWHMBYTHVOKZ-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- XUWOAUCQJYFQLT-UHFFFAOYSA-N 2,2-diphenylpropane-1,1,1-triol Chemical compound C=1C=CC=CC=1C(C(O)(O)O)(C)C1=CC=CC=C1 XUWOAUCQJYFQLT-UHFFFAOYSA-N 0.000 description 1
- BZUILZIKDIMXBK-UHFFFAOYSA-N 2-(oxiran-2-ylmethoxycarbonyl)benzoic acid Chemical class OC(=O)C1=CC=CC=C1C(=O)OCC1OC1 BZUILZIKDIMXBK-UHFFFAOYSA-N 0.000 description 1
- IMSODMZESSGVBE-UHFFFAOYSA-N 2-Oxazoline Chemical compound C1CN=CO1 IMSODMZESSGVBE-UHFFFAOYSA-N 0.000 description 1
- RBMHUYBJIYNRLY-UHFFFAOYSA-N 2-[(1-carboxy-1-hydroxyethyl)-hydroxyphosphoryl]-2-hydroxypropanoic acid Chemical compound OC(=O)C(O)(C)P(O)(=O)C(C)(O)C(O)=O RBMHUYBJIYNRLY-UHFFFAOYSA-N 0.000 description 1
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- VAWFFNJAPKXVPH-UHFFFAOYSA-N naphthalene-1,6-dicarboxylic acid Chemical compound OC(=O)C1=CC=CC2=CC(C(=O)O)=CC=C21 VAWFFNJAPKXVPH-UHFFFAOYSA-N 0.000 description 1
- FZZQNEVOYIYFPF-UHFFFAOYSA-N naphthalene-1,6-diol Chemical compound OC1=CC=CC2=CC(O)=CC=C21 FZZQNEVOYIYFPF-UHFFFAOYSA-N 0.000 description 1
- MNZMMCVIXORAQL-UHFFFAOYSA-N naphthalene-2,6-diol Chemical compound C1=C(O)C=CC2=CC(O)=CC=C21 MNZMMCVIXORAQL-UHFFFAOYSA-N 0.000 description 1
- WPUMVKJOWWJPRK-UHFFFAOYSA-N naphthalene-2,7-dicarboxylic acid Chemical compound C1=CC(C(O)=O)=CC2=CC(C(=O)O)=CC=C21 WPUMVKJOWWJPRK-UHFFFAOYSA-N 0.000 description 1
- DFQICHCWIIJABH-UHFFFAOYSA-N naphthalene-2,7-diol Chemical compound C1=CC(O)=CC2=CC(O)=CC=C21 DFQICHCWIIJABH-UHFFFAOYSA-N 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
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- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 1
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- 150000004893 oxazines Chemical class 0.000 description 1
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- LPNBBFKOUUSUDB-UHFFFAOYSA-N p-toluic acid Chemical compound CC1=CC=C(C(O)=O)C=C1 LPNBBFKOUUSUDB-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- QCDYQQDYXPDABM-UHFFFAOYSA-N phloroglucinol Chemical compound OC1=CC(O)=CC(O)=C1 QCDYQQDYXPDABM-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
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- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000118 poly(D-lactic acid) Polymers 0.000 description 1
- 229920001434 poly(D-lactide) Polymers 0.000 description 1
- 239000005015 poly(hydroxybutyrate) Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920002961 polybutylene succinate Polymers 0.000 description 1
- 239000004631 polybutylene succinate Substances 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- 239000004300 potassium benzoate Substances 0.000 description 1
- 235000010235 potassium benzoate Nutrition 0.000 description 1
- 229940103091 potassium benzoate Drugs 0.000 description 1
- FRMWBRPWYBNAFB-UHFFFAOYSA-M potassium salicylate Chemical compound [K+].OC1=CC=CC=C1C([O-])=O FRMWBRPWYBNAFB-UHFFFAOYSA-M 0.000 description 1
- 229960003629 potassium salicylate Drugs 0.000 description 1
- 229940114930 potassium stearate Drugs 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- ANBFRLKBEIFNQU-UHFFFAOYSA-M potassium;octadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCCCC([O-])=O ANBFRLKBEIFNQU-UHFFFAOYSA-M 0.000 description 1
- PYJBVGYZXWPIKK-UHFFFAOYSA-M potassium;tetradecanoate Chemical compound [K+].CCCCCCCCCCCCCC([O-])=O PYJBVGYZXWPIKK-UHFFFAOYSA-M 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229960000380 propiolactone Drugs 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- CQRYARSYNCAZFO-UHFFFAOYSA-N salicyl alcohol Chemical compound OCC1=CC=CC=C1O CQRYARSYNCAZFO-UHFFFAOYSA-N 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
- 239000004299 sodium benzoate Substances 0.000 description 1
- 235000010234 sodium benzoate Nutrition 0.000 description 1
- 229960003885 sodium benzoate Drugs 0.000 description 1
- BTURAGWYSMTVOW-UHFFFAOYSA-M sodium dodecanoate Chemical compound [Na+].CCCCCCCCCCCC([O-])=O BTURAGWYSMTVOW-UHFFFAOYSA-M 0.000 description 1
- 229940082004 sodium laurate Drugs 0.000 description 1
- 229940045845 sodium myristate Drugs 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- 229960004025 sodium salicylate Drugs 0.000 description 1
- ZHROMWXOTYBIMF-UHFFFAOYSA-M sodium;1,3,7,9-tetratert-butyl-11-oxido-5h-benzo[d][1,3,2]benzodioxaphosphocine 11-oxide Chemical compound [Na+].C1C2=CC(C(C)(C)C)=CC(C(C)(C)C)=C2OP([O-])(=O)OC2=C1C=C(C(C)(C)C)C=C2C(C)(C)C ZHROMWXOTYBIMF-UHFFFAOYSA-M 0.000 description 1
- KVCGISUBCHHTDD-UHFFFAOYSA-M sodium;4-methylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1 KVCGISUBCHHTDD-UHFFFAOYSA-M 0.000 description 1
- XTIVBOWLUYDHKE-UHFFFAOYSA-M sodium;cyclohexanecarboxylate Chemical compound [Na+].[O-]C(=O)C1CCCCC1 XTIVBOWLUYDHKE-UHFFFAOYSA-M 0.000 description 1
- JUQGWKYSEXPRGL-UHFFFAOYSA-M sodium;tetradecanoate Chemical compound [Na+].CCCCCCCCCCCCCC([O-])=O JUQGWKYSEXPRGL-UHFFFAOYSA-M 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
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- 239000010936 titanium Substances 0.000 description 1
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- 239000004408 titanium dioxide Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Biological Depolymerization Polymers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本明細書および特許請求の範囲において、「本質的に、以下の式[I]〜[IV]で示される繰返し単位により構成され」とは、液晶ポリマーがその構成成分として式[I]〜[IV]で示される繰返し単位の他に、液晶ポリマーの結晶融解温度が170〜250℃の範囲となる限り他の繰り返し単位を含有していてもよいことを意味する。
なお、本明細書および特許請求の範囲において、p+q+r+s=100モル%である。
さらに、本明細書および特許請求の範囲において、「2価の芳香族基」とは、エステル結合またはアミド結合を形成することができる置換基を2つ有する芳香族基を意味する。
[Ar1およびAr2は、それぞれ一種以上の2価の芳香族基を表し、p、q、rおよびsは、各繰返し単位の液晶ポリエステル中での組成比(モル%)であり、以下の式を満たすものである:
0.4≦p/q≦2.0
2モル%≦r≦15モル%、および
2モル%≦s≦15モル%]。
35モル%≦p≦48モル%、
35モル%≦q≦48モル%、
2モル%≦r≦15モル%、および
2モル%≦s≦15モル%。
ステレオコンプレックスの形成の確認は広角X線回折測定(WAXD)により行うことができ、2θ=12.4°、22.4°、24.1°の回折ピークの存在により確認できる(Macromolecules,Vol.29, No.1,1996)。
また、ステレオコンプレックス結晶含有率Xは、示差走査熱量計により測定される吸熱ピークのうち、150℃以上190℃未満に現れる吸熱ピークの融解エンタルピーΔHaと190℃以上250℃未満に現れる吸熱ピークの融解エンタルピーΔHbから下式(1)により算出される。
X={ΔHb/(ΔHa+ΔHb)}×100(%) (1)
実施例および比較例において、ポリL−乳酸、液晶ポリマー、相溶化剤および結晶核剤は、以下のものを使用した。
ポリL−乳酸:三井化学株式会社製ポリL−乳酸、レイシアH−400(数平均分子量104,000、重量平均分子量211,000、結晶融解温度166℃)。
液晶ポリマーA:上野製薬株式会社製芳香族液晶ポリエステル(パラヒドロキシ安息香酸/6−ヒドロキシ−2−ナフトエ酸/ハイドロキノン/テレフタル酸共重合体、結晶融解温度220℃)。
液晶ポリマーB:上野製薬株式会社製芳香族液晶ポリエステル(パラヒドロキシ安息香酸/6−ヒドロキシ−2−ナフトエ酸共重合体、結晶融解温度280℃)。
相溶化剤:日清紡績株式会社製ポリカルボジイミド、カルボジライトHMV−8CA。
結晶核剤:新日本理化株式会社製1,3,5−ベンゼントリカルボキサミド、エヌジェスター TF−1。
なお、ポリD−乳酸の以下のようにして合成したものを使用した。
D−ラクチド50gをフラスコに入れ、系内を窒素置換した後、ステアリルアルコール0.1g、オクチル酸スズ25mgを触媒として加え、190℃で2時間重合し、ポリマーを製造した。このポリマーを7%5N塩酸のアセトン溶液で洗浄し、触媒を除去した後80℃で10時間減圧乾燥し、精製ポリマーを得た。得られたポリマーの数平均分子量は115,000、重量平均分子量は250,000、結晶融解温度は163℃であった。
サンプル3mgを専用アルミニウムパンに入れ、島津製作所社製の示差走査熱量計SHIMADZU DSC−50を用いて、窒素ガス雰囲気下、昇温速度10℃/分で測定を行った。150℃以上に観察される吸熱ピークのピークトップ温度を結晶融解温度とした。
上記結晶融解温度の測定で得られた示差走査熱量計(DSC)による吸熱ピークにおいて、150℃以上190℃未満に現れる吸熱ピークの融解エンタルピーΔHaと、190℃以上250℃未満に現れる吸熱ピークの融解エンタルピーΔHbから下記式(1)にて算出した。
X={ΔHb/(ΔHa+ΔHb)}×100(%) (1)
溶融混練により得られたポリ乳酸樹脂組成物サンプルを100℃で6時間減圧乾燥し、230℃でプレスした後に急冷し、厚み0.2mmのポリ乳酸樹脂組成物フィルムを作成した。このフィルムの固相加熱処理を施したサンプルと施していないサンプルにつき、株式会社リガク社製X線回折装置RINT−2500を使用し5〜40°の範囲で4°/分のスキャン速度で測定を行った。なお、X線は波長0.1542nm(CuK線)を使用した。
上記の広角X線回折測定(WAXD)においてステレオコンプレックス結晶に対応する2θ=12.4°、22.4°、24.1°の回折ピークの存在により、ステレオコンプレックス結晶の形成を判断した。
溶融混練により得られたポリ乳酸樹脂組成物サンプルを100℃で6時間減圧乾燥し、230℃でプレスした後に急冷し、厚み0.2mmのポリ乳酸樹脂組成物フィルムを作成した。このフィルムを加熱圧縮機で1MPa加圧下、100℃で1時間加熱処理を行った。
ポリL−乳酸8.0g、ポリD−乳酸8.0g、液晶ポリマーA4.0g、相溶化剤0.24gを混合し、80℃で10時間減圧乾燥した。この乾燥混合物を株式会社オオバ機械社製一軸混練押出し機を使用し、シリンダー温度230℃、直径0.5mmのノズルを使用し、スクリュー回転速度20rpmで混練しながら押し出し、ポリ乳酸樹脂組成物サンプルを作成した。このポリ乳酸樹脂組成物サンプルのX線回折測定(WAXD)を行ったところ、2θ=12.4°、22.4°、24.1°の回折ピークが確認された。
上記実施例1で得られたポリ乳酸樹脂組成物サンプルを固相加熱処理しX線回折測定(WAXD)を行ったところ、2θ=12.4°、22.4°、24.1°の回折ピークが明瞭に確認された。また、示差走査熱量計により150℃以上190℃未満に現れる吸熱ピークの融解エンタルピーΔHaと、190℃以上250℃未満に現れる吸熱ピークの融解エンタルピーΔHbの測定を行ったところ、ΔHa=8.7J/g、ΔHb=22.4J/gであり、ステレオコンプレックス結晶含有率(X)=72.0%であった。
相溶化剤を配合しなかった(実施例3)、結晶核剤を配合した(実施例4)以外は実施例1の方法と同様にしてポリ乳酸樹脂組成物サンプルを作成し、ステレオコンプレックス結晶含有率(X)を算出した。結果を表1に示す。
液晶ポリマーを配合しなかった(比較例1)、260℃で混練した(比較例2)、液晶ポリマーとして結晶融解温度280℃の液晶ポリマーBを用いた(比較例3)以外は実施例1と同様にしてポリ乳酸樹脂組成物サンプルを作成した。
Claims (14)
- L−乳酸単位から構成されるポリL−乳酸、D−乳酸単位から構成されるポリD−乳酸、および液晶ポリマーを含有する、ポリ乳酸樹脂組成物であって、
ポリL−乳酸/ポリD−乳酸の重量比が、30/70〜70/30であり、
ポリL−乳酸およびポリD−乳酸の合計量100重量部に対して、液晶ポリマー5〜100重量部を含有し、
液晶ポリマーの示差走査熱量計により測定される結晶融解温度が170〜250℃であり、
液晶ポリマーが、本質的に、以下の式[I]〜[IV]で示される繰返し単位により構成される液晶ポリエステルであり:
0.4≦p/q≦2.0
2モル%≦r≦15モル%、および、
2モル%≦s≦15モル%]、
ポリ乳酸のステレオコンプレックス結晶を含有する、ポリ乳酸樹脂組成物。 - ポリL−乳酸およびポリD−乳酸の重量平均分子量が、いずれも40,000〜300,000である、請求項1に記載のポリ乳酸樹脂組成物。
- さらに相溶化剤を含有する、請求項1または2に記載のポリ乳酸樹脂組成物。
- 相溶化剤の含有量が、ポリL−乳酸およびポリD−乳酸の合計量100重量部に対して0.5〜10重量部である、請求項3に記載のポリ乳酸樹脂組成物。
- 相溶化剤が、カルボジイミド化合物および多官能エポキシ化合物からなる群から選ばれる少なくとも1種である、請求項3または4に記載のポリ乳酸樹脂組成物。
- 式[I]〜[IV]で表される繰返し単位の組成比が以下の式を満たすものである、請求項1〜5いずれかに記載のポリ乳酸樹脂組成物:
35モル%≦p≦48モル%、
35モル%≦q≦48モル%、
2モル%≦r≦15モル%、および
2モル%≦s≦15モル%。 - ステレオコンプレックス結晶の含有率が、ポリ乳酸樹脂組成物の全重量に対して30〜100重量%である、請求項1〜7いずれかに記載のポリ乳酸樹脂組成物。
- 請求項1〜8のいずれかに記載のポリ乳酸樹脂組成物を溶融加工して得られる成形品、フィルムおよび繊維からなる群から選択される製品。
- L−乳酸単位から構成されるポリL−乳酸、D−乳酸単位から構成されるポリD−乳酸、およびポリL−乳酸およびポリD−乳酸の合計量100重量部に対して5〜100重量部の液晶ポリマーとを配合し、170〜250℃の温度下で溶融混練することを含み、
ポリL−乳酸/ポリD−乳酸の重量比が、30/70〜70/30であり、
液晶ポリマーの示差走査熱量計により測定される結晶融解温度が170〜250℃であり、
液晶ポリマーが、本質的に、以下の式[I]〜[IV]で示される繰返し単位により構成される液晶ポリエステルであり:
0.4≦p/q≦2.0
2モル%≦r≦15モル%、および、
2モル%≦s≦15モル%]、
ポリ乳酸のステレオコンプレックス結晶を含有する、ポリ乳酸樹脂組成物の製造方法。 - さらに相溶化剤を配合することを含む、請求項10に記載のポリ乳酸樹脂組成物の製造方法。
- さらに結晶核剤を配合することを含む、請求項10または11に記載のポリ乳酸樹脂組成物の製造方法。
- 溶融混練した後に得られたポリ乳酸樹脂組成物を、さらに固相状態で70〜220℃で加熱することを含む、請求項10〜12いずれかに記載のポリ乳酸樹脂組成物の製造方法。
- 請求項10〜13いずれかに記載の方法にて得られた、ポリ乳酸のステレオコンプレックス結晶を含有するポリ乳酸樹脂組成物。
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