Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Itaru Tsukushi"'
Publikováno v:
Polymer Journal. 54:259-267
We estimated the configurational heat capacity for 21 types of polymers above the glass transition temperature (Tg) using molecular vibration analysis. The polymers for which the configurational heat capacity was determined are listed as follows: six
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0cdd993e130f439d52339208d362ebb
https://doi.org/10.1038/s41428-021-00582-z
https://doi.org/10.1038/s41428-021-00582-z
Publikováno v:
Polymer Journal. 54:33-39
In this study, we investigated the functions that reproduce the configurational heat capacity (Cconfig) above the glass transition temperature for polystyrene (PS), polyisobutylene (PIB), and their oligomers. The results show that Cconfig can be well
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::201deb35d6842feea15047e841be29f8
https://doi.org/10.1038/s41428-021-00554-3
https://doi.org/10.1038/s41428-021-00554-3
Publikováno v:
Polymer Journal. 53:1031-1036
In this study, the absolute values for the configurational heat capacity of polyisobutylene (PIB), isobutane (which corresponds to the monomer of PIB), and 2,2,4-isomethylpentane (which corresponds to the dimer of PIB) were estimated based on the ass
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c1528a25bf81302b46338c79e779948
https://doi.org/10.1038/s41428-021-00503-0
https://doi.org/10.1038/s41428-021-00503-0
Autor:
Marika Yokota, Itaru Tsukushi
Publikováno v:
Polymer Journal. 52:1113-1120
This study predicts the absolute values of heat capacities from the molecular formula per monomer for main-chain-type polymers below the glass transition temperature. The frequencies of the skeletal and group-vibration modes are calculated using the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c45f6bfb89fa5bf1821ae897d98c2c63
https://doi.org/10.1038/s41428-020-0365-2
https://doi.org/10.1038/s41428-020-0365-2
Autor:
Itaru Tsukushi, Marika Yokota
Publikováno v:
Polymer Journal. 52:1103-1111
We evaluated the absolute values of the heat capacity of polymer solids composed of polyesters and poly(oxide)s below the glass transition temperature. The frequencies of the skeletal and group-vibration modes were calculated by the Tarasov and Einst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29fae2e431c47e5e9f52a72ef358e2a3
https://doi.org/10.1038/s41428-020-0364-3
https://doi.org/10.1038/s41428-020-0364-3
Publikováno v:
Polymer Journal. 52:765-774
Despite being a useful variable for the quantitative analysis of the thermodynamic properties of polymers, the absolute value of heat capacity remains poorly understood for amorphous polymers. This study evaluates the absolute values of the heat capa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac82973e7ecaf2da49408bd624fd5309
https://doi.org/10.1038/s41428-020-0317-x
https://doi.org/10.1038/s41428-020-0317-x
Publikováno v:
Polymer Journal. 52:575-580
In this work, we analyze the absolute heat capacity below the glass-transition temperature Tg for two types of amorphous polystyrene with differing low-molecular weights. Both amorphous polystyrenes have excess heat capacities that cannot be reproduc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f6300a46c8a98eeb34accabb986894b
https://doi.org/10.1038/s41428-020-0310-4
https://doi.org/10.1038/s41428-020-0310-4
Publikováno v:
Thermochimica Acta. 720:179427
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::faad78e3cfa05a39f4a6c86e34a1b4ac
https://doi.org/10.1016/j.tca.2022.179427
https://doi.org/10.1016/j.tca.2022.179427
Autor:
Jun Fujimura, Masanobu Takatsuka, Minato Sugisaki, Itaru Tsukushi, Kaito Sasaki, Naoki Shinyashiki, Eri Nishiyama
Publikováno v:
Thermochimica Acta. 672:101-106
In this paper, we study relaxation phenomena in the styrene oligomer PSA-500 around the glass-transition temperature (Tg) using adiabatic calorimetry, thermally modulated differential-scanning calorimetry (TMDSC), dynamic light-scattering (DLS) measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d134d0e505d5bf54b97087fd5c1a5e46
https://doi.org/10.1016/j.tca.2018.12.017
https://doi.org/10.1016/j.tca.2018.12.017
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 135:2813-2817
Herein, we measured the enthalpy relaxation of three styrene oligomers with different molecular weights (styrene oligomer with Mw = 4.53 × 102: PSA-300, styrene oligomer with Mw = 5.89 × 102: PSA-500, and styrene oligomer with Mw = 1.01 × 103: PSA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b960f2fd0a73fb96be4c2a0414bf0b1b
https://doi.org/10.1007/s10973-018-7604-1
https://doi.org/10.1007/s10973-018-7604-1