Multi-step precipitation separation system using mixture of thermosensitive polymers

Takeshi Mori, Hironori Mori, Keiji Minagawa, Masami Tanaka

Research output: Contribution to journalReview article

4 Citations (Scopus)

Abstract

Multi-step precipitation separation system was developed by using aqueous mixtures of some thermosensitive polymers. The following three polymers were used here; poly(N-n-propylacrylamide), poly(N-isopropylacrylamide), and poly(N-isopropylmethacrylamide). A mixture of the three polymers showed three endothermic peaks, and the peak top temperatures were almost consistent with that of the each polymer solution. The polymers were purified by thermal precipitation to obtain fractions which can respond in narrow temperature ranges prior to use. In the case of the precipitation separation of two polymers mixtures, purities of the obtained precipitate and supernatant fractions became high comparing with the case in which the unpurified polymers were used. Parts of the polymers which were not the precipitation targets were also precipitated by the separation procedures. This was caused not only by insolubilization of the non-targeted polymers due to their phase transitions but also by their non-specific entanglement with the targeted polymers. The purities of the fractions also improved when the difference of the phase transition temperature between two polymers was large enough to avoid the coprecipitation. In the case of the precipitation separation of mixtures of the three polymers, purities of each fraction also improved when the purified polymers were used.

Original languageEnglish
Pages (from-to)211-220
Number of pages10
JournalPolymer Bulletin
Volume56
Issue number2-3
DOIs
Publication statusPublished - Feb 1 2006

Fingerprint

Polymers
polymers
purity
Phase transitions
Polymer solutions
Coprecipitation
Superconducting transition temperature
Precipitates
precipitates
transition temperature
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Multi-step precipitation separation system using mixture of thermosensitive polymers. / Mori, Takeshi; Mori, Hironori; Minagawa, Keiji; Tanaka, Masami.

In: Polymer Bulletin, Vol. 56, No. 2-3, 01.02.2006, p. 211-220.

Research output: Contribution to journalReview article

Mori, Takeshi ; Mori, Hironori ; Minagawa, Keiji ; Tanaka, Masami. / Multi-step precipitation separation system using mixture of thermosensitive polymers. In: Polymer Bulletin. 2006 ; Vol. 56, No. 2-3. pp. 211-220.
@article{8d17e02d5d1b420db27d28afd3acb4e7,
title = "Multi-step precipitation separation system using mixture of thermosensitive polymers",
abstract = "Multi-step precipitation separation system was developed by using aqueous mixtures of some thermosensitive polymers. The following three polymers were used here; poly(N-n-propylacrylamide), poly(N-isopropylacrylamide), and poly(N-isopropylmethacrylamide). A mixture of the three polymers showed three endothermic peaks, and the peak top temperatures were almost consistent with that of the each polymer solution. The polymers were purified by thermal precipitation to obtain fractions which can respond in narrow temperature ranges prior to use. In the case of the precipitation separation of two polymers mixtures, purities of the obtained precipitate and supernatant fractions became high comparing with the case in which the unpurified polymers were used. Parts of the polymers which were not the precipitation targets were also precipitated by the separation procedures. This was caused not only by insolubilization of the non-targeted polymers due to their phase transitions but also by their non-specific entanglement with the targeted polymers. The purities of the fractions also improved when the difference of the phase transition temperature between two polymers was large enough to avoid the coprecipitation. In the case of the precipitation separation of mixtures of the three polymers, purities of each fraction also improved when the purified polymers were used.",
author = "Takeshi Mori and Hironori Mori and Keiji Minagawa and Masami Tanaka",
year = "2006",
month = "2",
day = "1",
doi = "10.1007/s00289-005-0486-y",
language = "English",
volume = "56",
pages = "211--220",
journal = "Polymer Bulletin",
issn = "0170-0839",
publisher = "Springer Verlag",
number = "2-3",

}

TY - JOUR

T1 - Multi-step precipitation separation system using mixture of thermosensitive polymers

AU - Mori, Takeshi

AU - Mori, Hironori

AU - Minagawa, Keiji

AU - Tanaka, Masami

PY - 2006/2/1

Y1 - 2006/2/1

N2 - Multi-step precipitation separation system was developed by using aqueous mixtures of some thermosensitive polymers. The following three polymers were used here; poly(N-n-propylacrylamide), poly(N-isopropylacrylamide), and poly(N-isopropylmethacrylamide). A mixture of the three polymers showed three endothermic peaks, and the peak top temperatures were almost consistent with that of the each polymer solution. The polymers were purified by thermal precipitation to obtain fractions which can respond in narrow temperature ranges prior to use. In the case of the precipitation separation of two polymers mixtures, purities of the obtained precipitate and supernatant fractions became high comparing with the case in which the unpurified polymers were used. Parts of the polymers which were not the precipitation targets were also precipitated by the separation procedures. This was caused not only by insolubilization of the non-targeted polymers due to their phase transitions but also by their non-specific entanglement with the targeted polymers. The purities of the fractions also improved when the difference of the phase transition temperature between two polymers was large enough to avoid the coprecipitation. In the case of the precipitation separation of mixtures of the three polymers, purities of each fraction also improved when the purified polymers were used.

AB - Multi-step precipitation separation system was developed by using aqueous mixtures of some thermosensitive polymers. The following three polymers were used here; poly(N-n-propylacrylamide), poly(N-isopropylacrylamide), and poly(N-isopropylmethacrylamide). A mixture of the three polymers showed three endothermic peaks, and the peak top temperatures were almost consistent with that of the each polymer solution. The polymers were purified by thermal precipitation to obtain fractions which can respond in narrow temperature ranges prior to use. In the case of the precipitation separation of two polymers mixtures, purities of the obtained precipitate and supernatant fractions became high comparing with the case in which the unpurified polymers were used. Parts of the polymers which were not the precipitation targets were also precipitated by the separation procedures. This was caused not only by insolubilization of the non-targeted polymers due to their phase transitions but also by their non-specific entanglement with the targeted polymers. The purities of the fractions also improved when the difference of the phase transition temperature between two polymers was large enough to avoid the coprecipitation. In the case of the precipitation separation of mixtures of the three polymers, purities of each fraction also improved when the purified polymers were used.

UR - http://www.scopus.com/inward/record.url?scp=31144469938&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=31144469938&partnerID=8YFLogxK

U2 - 10.1007/s00289-005-0486-y

DO - 10.1007/s00289-005-0486-y

M3 - Review article

AN - SCOPUS:31144469938

VL - 56

SP - 211

EP - 220

JO - Polymer Bulletin

JF - Polymer Bulletin

SN - 0170-0839

IS - 2-3

ER -