Elevation of the flow temperature of gels formed by nano fibers of Poly(L-lactic acid) by surface crystallization induced by block copolymers

Yasuhiro Matsuda, Takahiro Fukui, Shun ich Ishima, Atsushi Takahara, Shigeru Tasaka

研究成果: ジャーナルへの寄稿記事

抄録

Block copolymers of poly (L-lactic acid) (PLLA) and polystyrene with different lengths of PLLA blocks entered into the network structures of PLLA gels formed with complex crystals with solvent molecules. The induced changes of the structure and the flow temperature of the gels were investigated to elucidate the mechanism of the block copolymers to elevate the flow temperature. The block copolymer with shorter PLLA blocks elevated the flow temperature of the PLLA gels from 40 °C to 70 °C by immersing in the block copolymer solution with a lower concentration (0.5 wt%). For the block copolymers with longer PLLA blocks, higher concentrations (2.0 wt%) were necessary to elevate the flow temperature to 70 °C, and the flow temperature was elevated to 80 °C by immersing more concentrated solutions (3.0 wt%). This behavior can be explained by assuming that the surface crystallization of PLLA fibers induced by the block copolymers elevated the flow temperature to 70 °C, and the reinforcement of the fibers by spherical structure of the block copolymers elevated the flow temperature to 80 °C, was proposed based on the experimental results.

元の言語英語
記事番号121768
ジャーナルpolymer
181
DOI
出版物ステータス出版済み - 10 24 2019

Fingerprint

Lactic acid
Crystallization
Block copolymers
Gels
Fibers
Temperature
Polystyrenes
poly(lactic acid)
Reinforcement
Crystals
Molecules

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

これを引用

Elevation of the flow temperature of gels formed by nano fibers of Poly(L-lactic acid) by surface crystallization induced by block copolymers. / Matsuda, Yasuhiro; Fukui, Takahiro; Ishima, Shun ich; Takahara, Atsushi; Tasaka, Shigeru.

:: polymer, 巻 181, 121768, 24.10.2019.

研究成果: ジャーナルへの寄稿記事

@article{44f3ac6e968843eea21f87f103bd284e,
title = "Elevation of the flow temperature of gels formed by nano fibers of Poly(L-lactic acid) by surface crystallization induced by block copolymers",
abstract = "Block copolymers of poly (L-lactic acid) (PLLA) and polystyrene with different lengths of PLLA blocks entered into the network structures of PLLA gels formed with complex crystals with solvent molecules. The induced changes of the structure and the flow temperature of the gels were investigated to elucidate the mechanism of the block copolymers to elevate the flow temperature. The block copolymer with shorter PLLA blocks elevated the flow temperature of the PLLA gels from 40 °C to 70 °C by immersing in the block copolymer solution with a lower concentration (0.5 wt{\%}). For the block copolymers with longer PLLA blocks, higher concentrations (2.0 wt{\%}) were necessary to elevate the flow temperature to 70 °C, and the flow temperature was elevated to 80 °C by immersing more concentrated solutions (3.0 wt{\%}). This behavior can be explained by assuming that the surface crystallization of PLLA fibers induced by the block copolymers elevated the flow temperature to 70 °C, and the reinforcement of the fibers by spherical structure of the block copolymers elevated the flow temperature to 80 °C, was proposed based on the experimental results.",
author = "Yasuhiro Matsuda and Takahiro Fukui and Ishima, {Shun ich} and Atsushi Takahara and Shigeru Tasaka",
year = "2019",
month = "10",
day = "24",
doi = "10.1016/j.polymer.2019.121768",
language = "English",
volume = "181",
journal = "Polymer",
issn = "0032-3861",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Elevation of the flow temperature of gels formed by nano fibers of Poly(L-lactic acid) by surface crystallization induced by block copolymers

AU - Matsuda, Yasuhiro

AU - Fukui, Takahiro

AU - Ishima, Shun ich

AU - Takahara, Atsushi

AU - Tasaka, Shigeru

PY - 2019/10/24

Y1 - 2019/10/24

N2 - Block copolymers of poly (L-lactic acid) (PLLA) and polystyrene with different lengths of PLLA blocks entered into the network structures of PLLA gels formed with complex crystals with solvent molecules. The induced changes of the structure and the flow temperature of the gels were investigated to elucidate the mechanism of the block copolymers to elevate the flow temperature. The block copolymer with shorter PLLA blocks elevated the flow temperature of the PLLA gels from 40 °C to 70 °C by immersing in the block copolymer solution with a lower concentration (0.5 wt%). For the block copolymers with longer PLLA blocks, higher concentrations (2.0 wt%) were necessary to elevate the flow temperature to 70 °C, and the flow temperature was elevated to 80 °C by immersing more concentrated solutions (3.0 wt%). This behavior can be explained by assuming that the surface crystallization of PLLA fibers induced by the block copolymers elevated the flow temperature to 70 °C, and the reinforcement of the fibers by spherical structure of the block copolymers elevated the flow temperature to 80 °C, was proposed based on the experimental results.

AB - Block copolymers of poly (L-lactic acid) (PLLA) and polystyrene with different lengths of PLLA blocks entered into the network structures of PLLA gels formed with complex crystals with solvent molecules. The induced changes of the structure and the flow temperature of the gels were investigated to elucidate the mechanism of the block copolymers to elevate the flow temperature. The block copolymer with shorter PLLA blocks elevated the flow temperature of the PLLA gels from 40 °C to 70 °C by immersing in the block copolymer solution with a lower concentration (0.5 wt%). For the block copolymers with longer PLLA blocks, higher concentrations (2.0 wt%) were necessary to elevate the flow temperature to 70 °C, and the flow temperature was elevated to 80 °C by immersing more concentrated solutions (3.0 wt%). This behavior can be explained by assuming that the surface crystallization of PLLA fibers induced by the block copolymers elevated the flow temperature to 70 °C, and the reinforcement of the fibers by spherical structure of the block copolymers elevated the flow temperature to 80 °C, was proposed based on the experimental results.

UR - http://www.scopus.com/inward/record.url?scp=85072516434&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85072516434&partnerID=8YFLogxK

U2 - 10.1016/j.polymer.2019.121768

DO - 10.1016/j.polymer.2019.121768

M3 - Article

AN - SCOPUS:85072516434

VL - 181

JO - Polymer

JF - Polymer

SN - 0032-3861

M1 - 121768

ER -