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

Weihua Ming; Yiqiang Zhao; Jun Zhao; Shoukuan Fu; Frank 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

Weihua Ming, Yiqiang Zhao, Jun Zhao, Shoukuan Fu, Frank N. Jones

Biochemistry, Chemistry, & Physics

Research output: Contribution to journal › Article › peer-review

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)	85-94
Number of pages	10
Journal	Macromolecular Symposia
Volume	155
DOIs	https://doi.org/10.1002/1521-3900(200004)155:1<85::aid-masy85>3.0.co;2-k
State	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.",

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

AU - Ming, Weihua

AU - Zhao, Yiqiang

AU - Zhao, Jun

AU - Fu, Shoukuan

AU - Jones, Frank 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.

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DO - 10.1002/1521-3900(200004)155:1<85::aid-masy85>3.0.co;2-k

M3 - Article

AN - SCOPUS:0033672836

SN - 1022-1360

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SP - 85

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JO - Macromolecular Symposia

JF - Macromolecular Symposia

ER -

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

Abstract

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