側鎖1,2ジオール結合を有するエチレンビニルアルコール共重合体とナイロン6-66ブレンド物の高圧水素耐性と分散状態の関係

Translated title of the contribution: Relation between high-pressure hydrogen resistance and morphology on blends of nylon 6-66 and ethylene vinyl alcohol copolymer with 1,2-diol side chains

Mitsuo Shibutani, Katsuhisa Tokumitsu, Hiroki Takeshita, Shogo Sumino, Shin Nishimura, Hirotada Fujiwara

Research output: Contribution to journalArticle

Abstract

We developed an ethylene vinyl alcohol copolymer with 1,2 diol side chains (hereinafter new EVOH) that can be melt-molded even though the ethylene content is about 16 mol%, and the properties of polymer alloy that consists of nylon 6-66 (hereinafter PA) and new EVOH were studied. The polymer alloy showed compatibility on the PA rich side,but the crystallinity of each component decreased at the same time. Especially when the PA content is 85wt.% for polymer alloy, PA crystals were not confirmed. The free volume of the composite increased linearly with the PA blend ratio,but the specific volume deviated from the linear relationship,which increased on the PA rich side. The normalized free volume was calculated using the amorphous ratio calculated from solid state NMR(T 1C : 13 C spin-lattice relaxation time) and I 3 (the relative intensity of the long time component) from PALS. It was confirmed that high pressure hydrogen resistance of PA blended with new EVOH was improved by using normalized free volume even on the PA rich side. This result is thought to be due to the amorphous part of PA reinforced by interaction with new EVOH.

Original languageJapanese
Pages (from-to)34-41
Number of pages8
JournalZairyo/Journal of the Society of Materials Science, Japan
Volume68
Issue number1
DOIs
Publication statusPublished - Jan 1 2019

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Nylon (trademark)
Free volume
butadiene
Hydrogen
polymer blends
copolymers
Polymers
Ethylene
alcohols
Alcohols
Copolymers
hydrogen
Spin-lattice relaxation
Density (specific gravity)
Relaxation time
Nuclear magnetic resonance
spin-lattice relaxation
compatibility
crystallinity
Crystals

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "側鎖1,2ジオール結合を有するエチレンビニルアルコール共重合体とナイロン6-66ブレンド物の高圧水素耐性と分散状態の関係",
abstract = "We developed an ethylene vinyl alcohol copolymer with 1,2 diol side chains (hereinafter new EVOH) that can be melt-molded even though the ethylene content is about 16 mol{\%}, and the properties of polymer alloy that consists of nylon 6-66 (hereinafter PA) and new EVOH were studied. The polymer alloy showed compatibility on the PA rich side,but the crystallinity of each component decreased at the same time. Especially when the PA content is 85wt.{\%} for polymer alloy, PA crystals were not confirmed. The free volume of the composite increased linearly with the PA blend ratio,but the specific volume deviated from the linear relationship,which increased on the PA rich side. The normalized free volume was calculated using the amorphous ratio calculated from solid state NMR(T 1C : 13 C spin-lattice relaxation time) and I 3 (the relative intensity of the long time component) from PALS. It was confirmed that high pressure hydrogen resistance of PA blended with new EVOH was improved by using normalized free volume even on the PA rich side. This result is thought to be due to the amorphous part of PA reinforced by interaction with new EVOH.",
author = "Mitsuo Shibutani and Katsuhisa Tokumitsu and Hiroki Takeshita and Shogo Sumino and Shin Nishimura and Hirotada Fujiwara",
year = "2019",
month = "1",
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language = "Japanese",
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pages = "34--41",
journal = "Zairyo/Journal of the Society of Materials Science, Japan",
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AU - Shibutani, Mitsuo

AU - Tokumitsu, Katsuhisa

AU - Takeshita, Hiroki

AU - Sumino, Shogo

AU - Nishimura, Shin

AU - Fujiwara, Hirotada

PY - 2019/1/1

Y1 - 2019/1/1

N2 - We developed an ethylene vinyl alcohol copolymer with 1,2 diol side chains (hereinafter new EVOH) that can be melt-molded even though the ethylene content is about 16 mol%, and the properties of polymer alloy that consists of nylon 6-66 (hereinafter PA) and new EVOH were studied. The polymer alloy showed compatibility on the PA rich side,but the crystallinity of each component decreased at the same time. Especially when the PA content is 85wt.% for polymer alloy, PA crystals were not confirmed. The free volume of the composite increased linearly with the PA blend ratio,but the specific volume deviated from the linear relationship,which increased on the PA rich side. The normalized free volume was calculated using the amorphous ratio calculated from solid state NMR(T 1C : 13 C spin-lattice relaxation time) and I 3 (the relative intensity of the long time component) from PALS. It was confirmed that high pressure hydrogen resistance of PA blended with new EVOH was improved by using normalized free volume even on the PA rich side. This result is thought to be due to the amorphous part of PA reinforced by interaction with new EVOH.

AB - We developed an ethylene vinyl alcohol copolymer with 1,2 diol side chains (hereinafter new EVOH) that can be melt-molded even though the ethylene content is about 16 mol%, and the properties of polymer alloy that consists of nylon 6-66 (hereinafter PA) and new EVOH were studied. The polymer alloy showed compatibility on the PA rich side,but the crystallinity of each component decreased at the same time. Especially when the PA content is 85wt.% for polymer alloy, PA crystals were not confirmed. The free volume of the composite increased linearly with the PA blend ratio,but the specific volume deviated from the linear relationship,which increased on the PA rich side. The normalized free volume was calculated using the amorphous ratio calculated from solid state NMR(T 1C : 13 C spin-lattice relaxation time) and I 3 (the relative intensity of the long time component) from PALS. It was confirmed that high pressure hydrogen resistance of PA blended with new EVOH was improved by using normalized free volume even on the PA rich side. This result is thought to be due to the amorphous part of PA reinforced by interaction with new EVOH.

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