Cargando…
Complicated Structure Change during Capillary Extrusion of Binary Blends of Polycarbonate and Poly(methyl methacrylate)
The effects of pressure and shear rate on the miscibility of binary blends comprising bisphenol-A polycarbonate (PC) and low molecular weight poly(methyl methacrylate) (PMMA) were investigated using a capillary rheometer. Both pressure and shear rate affected the miscibility. The examination of an e...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9026293/ https://www.ncbi.nlm.nih.gov/pubmed/35454475 http://dx.doi.org/10.3390/ma15082783 |
_version_ | 1784691088177496064 |
---|---|
author | Yamaguchi, Masayuki Nakamura, Kodai Kimura, Takeyoshi Moonprasith, Nantina Kida, Takumitsu Tsubouchi, Kyoko Narita, Takaaki Hiraoka, Tatsuhiro |
author_facet | Yamaguchi, Masayuki Nakamura, Kodai Kimura, Takeyoshi Moonprasith, Nantina Kida, Takumitsu Tsubouchi, Kyoko Narita, Takaaki Hiraoka, Tatsuhiro |
author_sort | Yamaguchi, Masayuki |
collection | PubMed |
description | The effects of pressure and shear rate on the miscibility of binary blends comprising bisphenol-A polycarbonate (PC) and low molecular weight poly(methyl methacrylate) (PMMA) were investigated using a capillary rheometer. Both pressure and shear rate affected the miscibility. The examination of an extruded strand of the blend provided information about the cause of the phase change. Under high pressure, pressure-induced demixing occurred at temperatures below the lower critical solution temperature (LCST) of the blend. Consequently, the extruded strand became opaque throughout. During shear-induced mixing/demixing, a part of the strand became opaque because of the distribution of the shear rate in the strand. For example, during shear-induced demixing, only the exterior of the strand, i.e., the high shear rate region, became opaque. Above the LCST, shear-induced mixing occurred, and only the center region of the strand became opaque. |
format | Online Article Text |
id | pubmed-9026293 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-90262932022-04-23 Complicated Structure Change during Capillary Extrusion of Binary Blends of Polycarbonate and Poly(methyl methacrylate) Yamaguchi, Masayuki Nakamura, Kodai Kimura, Takeyoshi Moonprasith, Nantina Kida, Takumitsu Tsubouchi, Kyoko Narita, Takaaki Hiraoka, Tatsuhiro Materials (Basel) Article The effects of pressure and shear rate on the miscibility of binary blends comprising bisphenol-A polycarbonate (PC) and low molecular weight poly(methyl methacrylate) (PMMA) were investigated using a capillary rheometer. Both pressure and shear rate affected the miscibility. The examination of an extruded strand of the blend provided information about the cause of the phase change. Under high pressure, pressure-induced demixing occurred at temperatures below the lower critical solution temperature (LCST) of the blend. Consequently, the extruded strand became opaque throughout. During shear-induced mixing/demixing, a part of the strand became opaque because of the distribution of the shear rate in the strand. For example, during shear-induced demixing, only the exterior of the strand, i.e., the high shear rate region, became opaque. Above the LCST, shear-induced mixing occurred, and only the center region of the strand became opaque. MDPI 2022-04-10 /pmc/articles/PMC9026293/ /pubmed/35454475 http://dx.doi.org/10.3390/ma15082783 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Yamaguchi, Masayuki Nakamura, Kodai Kimura, Takeyoshi Moonprasith, Nantina Kida, Takumitsu Tsubouchi, Kyoko Narita, Takaaki Hiraoka, Tatsuhiro Complicated Structure Change during Capillary Extrusion of Binary Blends of Polycarbonate and Poly(methyl methacrylate) |
title | Complicated Structure Change during Capillary Extrusion of Binary Blends of Polycarbonate and Poly(methyl methacrylate) |
title_full | Complicated Structure Change during Capillary Extrusion of Binary Blends of Polycarbonate and Poly(methyl methacrylate) |
title_fullStr | Complicated Structure Change during Capillary Extrusion of Binary Blends of Polycarbonate and Poly(methyl methacrylate) |
title_full_unstemmed | Complicated Structure Change during Capillary Extrusion of Binary Blends of Polycarbonate and Poly(methyl methacrylate) |
title_short | Complicated Structure Change during Capillary Extrusion of Binary Blends of Polycarbonate and Poly(methyl methacrylate) |
title_sort | complicated structure change during capillary extrusion of binary blends of polycarbonate and poly(methyl methacrylate) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9026293/ https://www.ncbi.nlm.nih.gov/pubmed/35454475 http://dx.doi.org/10.3390/ma15082783 |
work_keys_str_mv | AT yamaguchimasayuki complicatedstructurechangeduringcapillaryextrusionofbinaryblendsofpolycarbonateandpolymethylmethacrylate AT nakamurakodai complicatedstructurechangeduringcapillaryextrusionofbinaryblendsofpolycarbonateandpolymethylmethacrylate AT kimuratakeyoshi complicatedstructurechangeduringcapillaryextrusionofbinaryblendsofpolycarbonateandpolymethylmethacrylate AT moonprasithnantina complicatedstructurechangeduringcapillaryextrusionofbinaryblendsofpolycarbonateandpolymethylmethacrylate AT kidatakumitsu complicatedstructurechangeduringcapillaryextrusionofbinaryblendsofpolycarbonateandpolymethylmethacrylate AT tsubouchikyoko complicatedstructurechangeduringcapillaryextrusionofbinaryblendsofpolycarbonateandpolymethylmethacrylate AT naritatakaaki complicatedstructurechangeduringcapillaryextrusionofbinaryblendsofpolycarbonateandpolymethylmethacrylate AT hiraokatatsuhiro complicatedstructurechangeduringcapillaryextrusionofbinaryblendsofpolycarbonateandpolymethylmethacrylate |