JP6238793B2 - フッ化ビニリデン系樹脂の溶融成形方法 - Google Patents
フッ化ビニリデン系樹脂の溶融成形方法 Download PDFInfo
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- JP6238793B2 JP6238793B2 JP2014040866A JP2014040866A JP6238793B2 JP 6238793 B2 JP6238793 B2 JP 6238793B2 JP 2014040866 A JP2014040866 A JP 2014040866A JP 2014040866 A JP2014040866 A JP 2014040866A JP 6238793 B2 JP6238793 B2 JP 6238793B2
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- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 title claims description 75
- 238000000465 moulding Methods 0.000 title claims description 53
- 229920005989 resin Polymers 0.000 title claims description 43
- 239000011347 resin Substances 0.000 title claims description 43
- 238000000034 method Methods 0.000 title claims description 35
- 239000000155 melt Substances 0.000 claims description 54
- -1 polyethylene Polymers 0.000 claims description 53
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- 239000000203 mixture Substances 0.000 claims description 33
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 claims description 31
- 238000001125 extrusion Methods 0.000 claims description 13
- 229920001684 low density polyethylene Polymers 0.000 claims description 6
- 239000004702 low-density polyethylene Substances 0.000 claims description 6
- 229920005609 vinylidenefluoride/hexafluoropropylene copolymer Polymers 0.000 claims description 6
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 claims 1
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- 229920002981 polyvinylidene fluoride Polymers 0.000 description 39
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- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
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- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
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- 239000000654 additive Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical compound FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 2
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- KOFLVDBWRHFSAB-UHFFFAOYSA-N 1,2,4,5-tetrahydro-1-(phenylmethyl)-5,9b(1',2')-benzeno-9bh-benz(g)indol-3(3ah)-one Chemical compound C1C(C=2C3=CC=CC=2)C2=CC=CC=C2C23C1C(=O)CN2CC1=CC=CC=C1 KOFLVDBWRHFSAB-UHFFFAOYSA-N 0.000 description 1
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- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical class CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229920003355 Novatec® Polymers 0.000 description 1
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- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
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- RLAWWYSOJDYHDC-BZSNNMDCSA-N lisinopril Chemical compound C([C@H](N[C@@H](CCCCN)C(=O)N1[C@@H](CCC1)C(O)=O)C(O)=O)CC1=CC=CC=C1 RLAWWYSOJDYHDC-BZSNNMDCSA-N 0.000 description 1
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- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
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- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
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- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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Description
本発明に係るフッ化ビニリデン系樹脂の溶融成形方法は、重量平均分子量が25万以上かつ45万以下のフッ化ビニリデン系樹脂と、メルトフローレートが0.04g/10分以上かつ40g/10分以下のポリエチレンとを含む組成物であって、当該フッ化ビニリデン系樹脂100質量部に対する当該ポリエチレンの量が0.1質量部以上かつ5.0質量部以下である組成物を、1s−1以上かつ600s−1以下のせん断速度で溶融成形することを特徴としている。
本発明に係る溶融成形物は、上述の溶融成形方法によって製造されたことを特徴としている。
(PVDFの用意)
PVDFとして、以下のPVDF−A〜PVDF−Eを用いた。
下記a1とa2とを40/60の割合で混合した混合物(重量平均分子量(Mw)=38万)
a1:VDF単独重合体(Mw=35万)の粉末
a2:VDF/HFP共重合体(HFP含有量=6質量%,Mw=40万)の粉末
PVDF−B:
下記b1とb2とを60/40の割合で混合した混合物(Mw=42万)
b1:VDF/HFP共重合体(HFP含有量=1質量%,Mw=50万)の粉末
b2:VDF/HFP共重合体(HFP含有量=10質量%,Mw=24万)の粉末
PVDF−C:
VDF単独重合体(Mw=30万)
PVDF−D:
VDF単独重合体(Mw=21万)
PVDF−E:
VDF単独重合体(Mw=49万)
なお、重量平均分子量の測定方法およびHFP含有量の算出は以下のとおりである。
重量平均分子量は、GPC(ゲルパーミエイションクロマトグラフィー)を利用して測定を行い、ポリスチレンを標準サンプルとして算出した。GPCの測定用サンプルは、PVDF10mgを濃度10mMのLiBr−NMP溶液10mlに溶解して調製した。日本分光株式会社製GPC−900(カラム;昭和電工株式会社製Shodex KD−806M)を用いて、流速1mL/min、測定温度40℃で測定した。
PVDFのNMRスペクトルの測定は、測定溶媒として市販の重DMFをそのまま用い、Bruker社製AVANCE AC 400FT NMRスペクトルメータを用いて行った。HFP含有率は、参考文献:Maurizio Pianca, et al., Polymer, Volume 28, Issue 2, February 1987, pages 224-230 に記載された帰属および計算方法に従って求めた。
上記PVDF−A〜PVDF−Eと、種々のMFRを有するポリエチレン(PE)とを含むPVDFコンパウンドを調製した。ただし、MFRが40を超えるものについてはポリエチレンに代えて、アルコンP−115(脂肪族飽和炭化水素樹脂)またはFT−115(フィッシャートロプシュワックス)を用いた。フィッシャートロプシュワックスの化学式はCnH2n+2であり、ポリエチレンワックスと実質的に同等の構造を有する。ポリエチレンの配合量、種類およびMFRなどについては表1にまとめた。また、各PVDFコンパウンドに番号を付した。
HDPE(日本ポリエチレン株式会社製 ノバテックHF560):0.5質量部
炭酸カルシウム(白石カルシウム株式会社製,平均粒径0.15μm):0.03質量部
IRGANOX1076(BASF社製):0.12質量部
また、他のPVDFコンパウンドも適宜配合量を変更して調製した。
東洋精機製キャピログラフ1Dを使用し、内径1φ×厚さ10mmのキャピラリーダイを使用して、各コンパウンドの240℃での溶融粘度を測定した。
240℃、種々のせん断速度(s−1)における溶融粘度(Pa・s)を、図1および図2に示した。図1の(a)はPVDF−A、図1の(b)はPVDF−B、図1の(c)はPVDF−Cの結果である。図2の(a)はPVDF−D、図2の(b)はPVDF−Eの結果である。また、240℃、せん断速度24s−1における溶融粘度を表2にまとめた。
(押出成形による成形物の製造)
コンパウンドB−10を単軸スクリュー押出成形機(株式会社プラ技研製 PEX−40−24H)に供給し、樹脂温度240℃でTダイから溶融押出し、厚み3mmのPVDFシートを1cm/minの製造条件で作製した。
コンパウンドB−10を射出成形機(東芝機械製 EC100N−3Y)に供給し、ヒータ温度220℃、金型温度100℃で射出成形を行った。射出成形機のノズル径は3mm、シリンダー径は32mm、射出速度は10mm/sの条件とした。
押出成形および射出成形による成形物(引張試験片)について、島津製作所製AG−2000Eを使用し、標線間距離を20mm、引張速度を50mm/minとして引張試験を行った。
押出成形および射出成形による成形物(アイゾット衝撃強度試験片)について、東洋精機製アイゾット衝撃試験機を使用してアイゾット衝撃強度の測定を行った。
各試験の結果を表3にまとめた。成形物の破断点歪みおよびアイゾット衝撃強度は押出成形物でより優れた値が得られた。これは、押出成形物では、成形時のせん断速度が小さいために、高分子鎖の配向が小さく、ポリフッ化ビニリデン本来の優れた靱性が発現されたからだと考えられる。
Claims (7)
- 重量平均分子量が25万以上かつ45万以下のフッ化ビニリデン系樹脂と、メルトフローレートが0.04g/10分以上かつ40g/10分以下のポリエチレンとを含む組成物であって、当該フッ化ビニリデン系樹脂100質量部に対する当該ポリエチレンの量が0.1質量部以上かつ5.0質量部以下である組成物を、1s−1以上かつ600s−1以下のせん断速度、及び、170℃以上かつ260℃以下の温度で溶融成形することを特徴とする、フッ化ビニリデン系樹脂の溶融成形方法。
- 上記フッ化ビニリデン系樹脂は、少なくとも2種類以上の共重合体の混合物であることを特徴とする、請求項1に記載の溶融成形方法。
- 上記少なくとも2種類以上の共重合体の混合物は、単相系を形成するものであることを特徴とする、請求項2に記載の溶融成形方法。
- 上記少なくとも2種類以上の共重合体の混合物は、
ヘキサフルオロプロピレン含有量0.5質量%以上かつ7.0質量%未満のフッ化ビニリデン/ヘキサフルオロプロピレン系共重合体Aと、
ヘキサフルオロプロピレン含有量8.0質量%以上かつ20.0質量%未満のフッ化ビニリデン/ヘキサフルオロプロピレン系共重合体Bとを少なくとも含んでいることを特徴とする、請求項2または3に記載の溶融成形方法。 - 上記フッ化ビニリデン/ヘキサフルオロプロピレン系共重合体Aは、上記フッ化ビニリデン系樹脂の全体量の20.0質量%以上かつ80.0質量%以下の量であり、
上記フッ化ビニリデン/ヘキサフルオロプロピレン系共重合体Bは、上記フッ化ビニリデン系樹脂の全体量の20.0質量%以上かつ80.0質量%以下の量であることを特徴とする、請求項4に記載の溶融成形方法。 - 上記溶融成形の方法は、押出成形であることを特徴とする、請求項1〜5の何れか1項に記載の溶融成形方法。
- 上記ポリエチレンは、低密度ポリエチレンであることを特徴とする、請求項1〜6の何れか1項に記載の溶融成形方法。
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