Solid state properties of poly(spiro[2,4]hepta-4,6-diene)

Hiroaki Sugimoto, Motowo Takayanagi, Toyoki Kunitake

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Poly(spiro[2,4]hepta-4,6-diene) (PSHD) is considered to behave like a rigid rod on the basis of the unusually large index (α=1.7) in the viscosity-molecular weight relationship. Thus, some solid state properties were investigated with PSHD samples which contained different ratios of the 1,2- and 1,4-addition units. The thermo-mechanical curve of solvent-cast films showed that there were two tanδ peaks below 300°C. The β peak was located at about 130°C (110 Hz), and affected little by the polymer composition. On the other hand, the position of the α peak shifted linearly from 200°C to 300°C with increasing fraction of the 1,4-unit, and the peak height decreased simultaneously. A loss peak associated with thermal decomposition and/or crosslinking was found at temperatures above 300°C. The TGA curve revealed that the thermal decomposition of PSHD takes place at about 300°C in air and at about 400°C under nitrogen. An exothermic peak was found in the same temperature range in the DSC curve. The crosslinked specimen showed no loss peak in dynamic measurements, which reflected immobilization of the molecule by crosslinks. The PSHD film did not show any indication of crystallinity.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalPolymer Journal
Volume9
Issue number1
DOIs
Publication statusPublished - Jan 1977

Fingerprint

Pyrolysis
Crosslinking
Polymers
Nitrogen
Molecular weight
Viscosity
Temperature
Molecules
Air
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Solid state properties of poly(spiro[2,4]hepta-4,6-diene). / Sugimoto, Hiroaki; Takayanagi, Motowo; Kunitake, Toyoki.

In: Polymer Journal, Vol. 9, No. 1, 01.1977, p. 95-100.

Research output: Contribution to journalArticle

Sugimoto, H, Takayanagi, M & Kunitake, T 1977, 'Solid state properties of poly(spiro[2,4]hepta-4,6-diene)', Polymer Journal, vol. 9, no. 1, pp. 95-100. https://doi.org/10.1295/polymj.9.95
Sugimoto, Hiroaki ; Takayanagi, Motowo ; Kunitake, Toyoki. / Solid state properties of poly(spiro[2,4]hepta-4,6-diene). In: Polymer Journal. 1977 ; Vol. 9, No. 1. pp. 95-100.
@article{1b164b2c0dd248869a59ba8465721c99,
title = "Solid state properties of poly(spiro[2,4]hepta-4,6-diene)",
abstract = "Poly(spiro[2,4]hepta-4,6-diene) (PSHD) is considered to behave like a rigid rod on the basis of the unusually large index (α=1.7) in the viscosity-molecular weight relationship. Thus, some solid state properties were investigated with PSHD samples which contained different ratios of the 1,2- and 1,4-addition units. The thermo-mechanical curve of solvent-cast films showed that there were two tanδ peaks below 300°C. The β peak was located at about 130°C (110 Hz), and affected little by the polymer composition. On the other hand, the position of the α peak shifted linearly from 200°C to 300°C with increasing fraction of the 1,4-unit, and the peak height decreased simultaneously. A loss peak associated with thermal decomposition and/or crosslinking was found at temperatures above 300°C. The TGA curve revealed that the thermal decomposition of PSHD takes place at about 300°C in air and at about 400°C under nitrogen. An exothermic peak was found in the same temperature range in the DSC curve. The crosslinked specimen showed no loss peak in dynamic measurements, which reflected immobilization of the molecule by crosslinks. The PSHD film did not show any indication of crystallinity.",
author = "Hiroaki Sugimoto and Motowo Takayanagi and Toyoki Kunitake",
year = "1977",
month = "1",
doi = "10.1295/polymj.9.95",
language = "English",
volume = "9",
pages = "95--100",
journal = "Polymer Journal",
issn = "0032-3896",
publisher = "Nature Publishing Group",
number = "1",

}

TY - JOUR

T1 - Solid state properties of poly(spiro[2,4]hepta-4,6-diene)

AU - Sugimoto, Hiroaki

AU - Takayanagi, Motowo

AU - Kunitake, Toyoki

PY - 1977/1

Y1 - 1977/1

N2 - Poly(spiro[2,4]hepta-4,6-diene) (PSHD) is considered to behave like a rigid rod on the basis of the unusually large index (α=1.7) in the viscosity-molecular weight relationship. Thus, some solid state properties were investigated with PSHD samples which contained different ratios of the 1,2- and 1,4-addition units. The thermo-mechanical curve of solvent-cast films showed that there were two tanδ peaks below 300°C. The β peak was located at about 130°C (110 Hz), and affected little by the polymer composition. On the other hand, the position of the α peak shifted linearly from 200°C to 300°C with increasing fraction of the 1,4-unit, and the peak height decreased simultaneously. A loss peak associated with thermal decomposition and/or crosslinking was found at temperatures above 300°C. The TGA curve revealed that the thermal decomposition of PSHD takes place at about 300°C in air and at about 400°C under nitrogen. An exothermic peak was found in the same temperature range in the DSC curve. The crosslinked specimen showed no loss peak in dynamic measurements, which reflected immobilization of the molecule by crosslinks. The PSHD film did not show any indication of crystallinity.

AB - Poly(spiro[2,4]hepta-4,6-diene) (PSHD) is considered to behave like a rigid rod on the basis of the unusually large index (α=1.7) in the viscosity-molecular weight relationship. Thus, some solid state properties were investigated with PSHD samples which contained different ratios of the 1,2- and 1,4-addition units. The thermo-mechanical curve of solvent-cast films showed that there were two tanδ peaks below 300°C. The β peak was located at about 130°C (110 Hz), and affected little by the polymer composition. On the other hand, the position of the α peak shifted linearly from 200°C to 300°C with increasing fraction of the 1,4-unit, and the peak height decreased simultaneously. A loss peak associated with thermal decomposition and/or crosslinking was found at temperatures above 300°C. The TGA curve revealed that the thermal decomposition of PSHD takes place at about 300°C in air and at about 400°C under nitrogen. An exothermic peak was found in the same temperature range in the DSC curve. The crosslinked specimen showed no loss peak in dynamic measurements, which reflected immobilization of the molecule by crosslinks. The PSHD film did not show any indication of crystallinity.

UR - http://www.scopus.com/inward/record.url?scp=0017427695&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0017427695&partnerID=8YFLogxK

U2 - 10.1295/polymj.9.95

DO - 10.1295/polymj.9.95

M3 - Article

AN - SCOPUS:0017427695

VL - 9

SP - 95

EP - 100

JO - Polymer Journal

JF - Polymer Journal

SN - 0032-3896

IS - 1

ER -