Chain conformation change upon heating for Pauci-chain polystyrene microsphere made by microemulsion polymerization

W. Ming; Y.Q. Zhao; Jun Zhao; Shoukuan Fu; F.N. Jones

doi:10.1002/1521-3900(200004)155:1<85::AID-MASY85>3.0.CO;2-K

Chain conformation change upon heating for Pauci-chain polystyrene microsphere made by microemulsion polymerization

W. Ming, Y.Q. Zhao, Jun Zhao, Shoukuan Fu, F.N. Jones

Chemical Engineering and Chemistry

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Abstract

The conformation change of pauci-chain polystyrene microsphere (micro-PS) upon heating was investigated by in-situ FTIR. For the peaks at 1492 and 1452 cm-1 due to phenyl ring semicircle stretch, there are two discontinuities in the plots of peak height versus temperature. The first discontinuity at around 100 °C corresponds to the glass transition. The second discontinuity at about 155 °C is in good agreement with the second exotherm in the first DSC scan, which clearly suggests a non-negligible change of the chain conformation at this temperature. This finding may be of help in further illustrating the two exotherms of micro-PS in its first DSC scan.

Original language	English
Pages (from-to)	85-93
Journal	Macromolecular Symposia
Volume	155
Issue number	1
DOIs	https://doi.org/10.1002/1521-3900(200004)155:1<85::AID-MASY85>3.0.CO;2-K
Publication status	Published - 2000

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title = "Chain conformation change upon heating for Pauci-chain polystyrene microsphere made by microemulsion polymerization",

abstract = "The conformation change of pauci-chain polystyrene microsphere (micro-PS) upon heating was investigated by in-situ FTIR. For the peaks at 1492 and 1452 cm-1 due to phenyl ring semicircle stretch, there are two discontinuities in the plots of peak height versus temperature. The first discontinuity at around 100 °C corresponds to the glass transition. The second discontinuity at about 155 °C is in good agreement with the second exotherm in the first DSC scan, which clearly suggests a non-negligible change of the chain conformation at this temperature. This finding may be of help in further illustrating the two exotherms of micro-PS in its first DSC scan.",

author = "W. Ming and Y.Q. Zhao and Jun Zhao and Shoukuan Fu and F.N. Jones",

year = "2000",

doi = "10.1002/1521-3900(200004)155:1<85::AID-MASY85>3.0.CO;2-K",

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journal = "Macromolecular Symposia",

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T1 - Chain conformation change upon heating for Pauci-chain polystyrene microsphere made by microemulsion polymerization

AU - Ming, W.

AU - Zhao, Y.Q.

AU - Zhao, Jun

AU - Fu, Shoukuan

AU - Jones, F.N.

PY - 2000

Y1 - 2000

N2 - The conformation change of pauci-chain polystyrene microsphere (micro-PS) upon heating was investigated by in-situ FTIR. For the peaks at 1492 and 1452 cm-1 due to phenyl ring semicircle stretch, there are two discontinuities in the plots of peak height versus temperature. The first discontinuity at around 100 °C corresponds to the glass transition. The second discontinuity at about 155 °C is in good agreement with the second exotherm in the first DSC scan, which clearly suggests a non-negligible change of the chain conformation at this temperature. This finding may be of help in further illustrating the two exotherms of micro-PS in its first DSC scan.

AB - The conformation change of pauci-chain polystyrene microsphere (micro-PS) upon heating was investigated by in-situ FTIR. For the peaks at 1492 and 1452 cm-1 due to phenyl ring semicircle stretch, there are two discontinuities in the plots of peak height versus temperature. The first discontinuity at around 100 °C corresponds to the glass transition. The second discontinuity at about 155 °C is in good agreement with the second exotherm in the first DSC scan, which clearly suggests a non-negligible change of the chain conformation at this temperature. This finding may be of help in further illustrating the two exotherms of micro-PS in its first DSC scan.

U2 - 10.1002/1521-3900(200004)155:1<85::AID-MASY85>3.0.CO;2-K

DO - 10.1002/1521-3900(200004)155:1<85::AID-MASY85>3.0.CO;2-K

M3 - Article

SN - 1022-1360

VL - 155

SP - 85

EP - 93

JO - Macromolecular Symposia

JF - Macromolecular Symposia

IS - 1

ER -

Chain conformation change upon heating for Pauci-chain polystyrene microsphere made by microemulsion polymerization

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