Poly(2,5-benzimidazole) nanofibers prepared by reaction-induced crystallization

Kazuya Kimura, Jin Gong, Shin Ichiro Kohama, Shinichi Yamazaki, Tetsuya Uchida, Kunio Kimura

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Morphological control of poly(2,5-benzimidazole) (PBI) was examined by reaction-induced phase separation of oligomers during polymerization to prepare nanofibers. Three monomers, 3,4-diaminobenzoic acid (DABA), 3,4- diacetoamidebenzoic acid (DAcBA) and phenyl 3,4-diaminobenzoate (PDAB), were used to synthesize PBI. Polymerizations were carried out at 350 °C in a mixture of dibenzyltoluene isomers. Polymerization of DABA yielded spheres with plate-like crystals on their surface. Polymerization of DAcBA yielded almost no precipitates because of the high solubility of DAcBA oligomers. By contrast, polymerization of PDAB yielded aggregates of PBI nanofibers (of which the average diameter was 60 nm), which resembled nonwoven fabrics. These fibers were formed by precipitation of (2,5-benzimidazole) oligomers and their subsequent polymerization into a developing crystal structure. The structure of the monomer significantly influenced the morphology of the PBI product, and PDAB was preferable for the preparation of PBI nanofibers. The temperature of 10% N 2 weight loss in these nanofibers was in the range of 634-644 °C and they were thermally stable.

Original languageEnglish
Pages (from-to)375-382
Number of pages8
JournalPolymer Journal
Volume42
Issue number5
DOIs
Publication statusPublished - May 2010

Fingerprint

Nanofibers
Crystallization
Polymerization
Oligomers
Acids
Monomers
Nonwoven fabrics
Phase separation
Isomers
benzimidazole
Precipitates
Solubility
Crystal structure
Crystals
Fibers
Temperature

Keywords

  • Heterocyclic polymer
  • Nanofiber
  • Phase separation
  • Polybenzimidazole

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Poly(2,5-benzimidazole) nanofibers prepared by reaction-induced crystallization. / Kimura, Kazuya; Gong, Jin; Kohama, Shin Ichiro; Yamazaki, Shinichi; Uchida, Tetsuya; Kimura, Kunio.

In: Polymer Journal, Vol. 42, No. 5, 05.2010, p. 375-382.

Research output: Contribution to journalArticle

@article{84625730415444c58681689605c93c70,
title = "Poly(2,5-benzimidazole) nanofibers prepared by reaction-induced crystallization",
abstract = "Morphological control of poly(2,5-benzimidazole) (PBI) was examined by reaction-induced phase separation of oligomers during polymerization to prepare nanofibers. Three monomers, 3,4-diaminobenzoic acid (DABA), 3,4- diacetoamidebenzoic acid (DAcBA) and phenyl 3,4-diaminobenzoate (PDAB), were used to synthesize PBI. Polymerizations were carried out at 350 °C in a mixture of dibenzyltoluene isomers. Polymerization of DABA yielded spheres with plate-like crystals on their surface. Polymerization of DAcBA yielded almost no precipitates because of the high solubility of DAcBA oligomers. By contrast, polymerization of PDAB yielded aggregates of PBI nanofibers (of which the average diameter was 60 nm), which resembled nonwoven fabrics. These fibers were formed by precipitation of (2,5-benzimidazole) oligomers and their subsequent polymerization into a developing crystal structure. The structure of the monomer significantly influenced the morphology of the PBI product, and PDAB was preferable for the preparation of PBI nanofibers. The temperature of 10{\%} N 2 weight loss in these nanofibers was in the range of 634-644 °C and they were thermally stable.",
keywords = "Heterocyclic polymer, Nanofiber, Phase separation, Polybenzimidazole",
author = "Kazuya Kimura and Jin Gong and Kohama, {Shin Ichiro} and Shinichi Yamazaki and Tetsuya Uchida and Kunio Kimura",
year = "2010",
month = "5",
doi = "10.1038/pj.2010.20",
language = "English",
volume = "42",
pages = "375--382",
journal = "Polymer Journal",
issn = "0032-3896",
publisher = "Nature Publishing Group",
number = "5",

}

TY - JOUR

T1 - Poly(2,5-benzimidazole) nanofibers prepared by reaction-induced crystallization

AU - Kimura, Kazuya

AU - Gong, Jin

AU - Kohama, Shin Ichiro

AU - Yamazaki, Shinichi

AU - Uchida, Tetsuya

AU - Kimura, Kunio

PY - 2010/5

Y1 - 2010/5

N2 - Morphological control of poly(2,5-benzimidazole) (PBI) was examined by reaction-induced phase separation of oligomers during polymerization to prepare nanofibers. Three monomers, 3,4-diaminobenzoic acid (DABA), 3,4- diacetoamidebenzoic acid (DAcBA) and phenyl 3,4-diaminobenzoate (PDAB), were used to synthesize PBI. Polymerizations were carried out at 350 °C in a mixture of dibenzyltoluene isomers. Polymerization of DABA yielded spheres with plate-like crystals on their surface. Polymerization of DAcBA yielded almost no precipitates because of the high solubility of DAcBA oligomers. By contrast, polymerization of PDAB yielded aggregates of PBI nanofibers (of which the average diameter was 60 nm), which resembled nonwoven fabrics. These fibers were formed by precipitation of (2,5-benzimidazole) oligomers and their subsequent polymerization into a developing crystal structure. The structure of the monomer significantly influenced the morphology of the PBI product, and PDAB was preferable for the preparation of PBI nanofibers. The temperature of 10% N 2 weight loss in these nanofibers was in the range of 634-644 °C and they were thermally stable.

AB - Morphological control of poly(2,5-benzimidazole) (PBI) was examined by reaction-induced phase separation of oligomers during polymerization to prepare nanofibers. Three monomers, 3,4-diaminobenzoic acid (DABA), 3,4- diacetoamidebenzoic acid (DAcBA) and phenyl 3,4-diaminobenzoate (PDAB), were used to synthesize PBI. Polymerizations were carried out at 350 °C in a mixture of dibenzyltoluene isomers. Polymerization of DABA yielded spheres with plate-like crystals on their surface. Polymerization of DAcBA yielded almost no precipitates because of the high solubility of DAcBA oligomers. By contrast, polymerization of PDAB yielded aggregates of PBI nanofibers (of which the average diameter was 60 nm), which resembled nonwoven fabrics. These fibers were formed by precipitation of (2,5-benzimidazole) oligomers and their subsequent polymerization into a developing crystal structure. The structure of the monomer significantly influenced the morphology of the PBI product, and PDAB was preferable for the preparation of PBI nanofibers. The temperature of 10% N 2 weight loss in these nanofibers was in the range of 634-644 °C and they were thermally stable.

KW - Heterocyclic polymer

KW - Nanofiber

KW - Phase separation

KW - Polybenzimidazole

UR - http://www.scopus.com/inward/record.url?scp=77952070028&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77952070028&partnerID=8YFLogxK

U2 - 10.1038/pj.2010.20

DO - 10.1038/pj.2010.20

M3 - Article

AN - SCOPUS:77952070028

VL - 42

SP - 375

EP - 382

JO - Polymer Journal

JF - Polymer Journal

SN - 0032-3896

IS - 5

ER -