Glass transition temperatures and rigid amorphous fraction of poly(ether ether ketone) and poly(ether imide) blends

Heon Sang Lee; Woo Nyon Kim

doi:10.1016/s0032-3861(97)85599-1

Glass transition temperatures and rigid amorphous fraction of poly(ether ether ketone) and poly(ether imide) blends

Heon Sang Lee, Woo Nyon Kim

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

37 Citations (Scopus)

Abstract

Blends of poly(ether ether ketone) (PEEK) and poly(ether imide) (PEI) prepared by screw extrusion have been investigated using a differential scanning calorimeter. The amorphous samples obtained by quenching in the liquid nitrogen show a single glass transition temperature (T_g). However, semicrystalline samples cooled in d.s.c. show double glass transition temperatures. From these results, it is suggested that the blends of PEEK and PEI are miscible in the amorphous state and partially miscible in the semicrystalline state. From the measured degree of crystallinity (X_c) and specific heat increment (ΔC_p) at T_g, the rigid amorphous fraction (X_r) for the semicrystalline PEEK-PEI blends was calculated and found to be 0.117-0.358 with cooling rates in d.s.c. The effect of cooling rate and PEI composition on the rigid amorphous fraction (X_r) of PEEK in the PEEK-PEI blends are discussed.

Original language	English
Pages (from-to)	2657-2663
Number of pages	7
Journal	Polymer
Volume	38
Issue number	11
DOIs	https://doi.org/10.1016/s0032-3861(97)85599-1
Publication status	Published - 1997 May

Bibliographical note

Funding Information:
This work was supportedb y the Korea Science and EngineeringFo undationu nderc ontracNt o. 93-0300-02-02-3.

Keywords

Poly(ether ether ketone)
Poly(ether imide)
Rigid amorphous fraction

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/s0032-3861(97)85599-1

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title = "Glass transition temperatures and rigid amorphous fraction of poly(ether ether ketone) and poly(ether imide) blends",

abstract = "Blends of poly(ether ether ketone) (PEEK) and poly(ether imide) (PEI) prepared by screw extrusion have been investigated using a differential scanning calorimeter. The amorphous samples obtained by quenching in the liquid nitrogen show a single glass transition temperature (Tg). However, semicrystalline samples cooled in d.s.c. show double glass transition temperatures. From these results, it is suggested that the blends of PEEK and PEI are miscible in the amorphous state and partially miscible in the semicrystalline state. From the measured degree of crystallinity (Xc) and specific heat increment (ΔCp) at Tg, the rigid amorphous fraction (Xr) for the semicrystalline PEEK-PEI blends was calculated and found to be 0.117-0.358 with cooling rates in d.s.c. The effect of cooling rate and PEI composition on the rigid amorphous fraction (Xr) of PEEK in the PEEK-PEI blends are discussed.",

keywords = "Poly(ether ether ketone), Poly(ether imide), Rigid amorphous fraction",

author = "Lee, {Heon Sang} and Kim, {Woo Nyon}",

note = "Funding Information: This work was supportedb y the Korea Science and EngineeringFo undationu nderc ontracNt o. 93-0300-02-02-3.",

year = "1997",

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doi = "10.1016/s0032-3861(97)85599-1",

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T1 - Glass transition temperatures and rigid amorphous fraction of poly(ether ether ketone) and poly(ether imide) blends

AU - Lee, Heon Sang

AU - Kim, Woo Nyon

N1 - Funding Information: This work was supportedb y the Korea Science and EngineeringFo undationu nderc ontracNt o. 93-0300-02-02-3.

PY - 1997/5

Y1 - 1997/5

N2 - Blends of poly(ether ether ketone) (PEEK) and poly(ether imide) (PEI) prepared by screw extrusion have been investigated using a differential scanning calorimeter. The amorphous samples obtained by quenching in the liquid nitrogen show a single glass transition temperature (Tg). However, semicrystalline samples cooled in d.s.c. show double glass transition temperatures. From these results, it is suggested that the blends of PEEK and PEI are miscible in the amorphous state and partially miscible in the semicrystalline state. From the measured degree of crystallinity (Xc) and specific heat increment (ΔCp) at Tg, the rigid amorphous fraction (Xr) for the semicrystalline PEEK-PEI blends was calculated and found to be 0.117-0.358 with cooling rates in d.s.c. The effect of cooling rate and PEI composition on the rigid amorphous fraction (Xr) of PEEK in the PEEK-PEI blends are discussed.

AB - Blends of poly(ether ether ketone) (PEEK) and poly(ether imide) (PEI) prepared by screw extrusion have been investigated using a differential scanning calorimeter. The amorphous samples obtained by quenching in the liquid nitrogen show a single glass transition temperature (Tg). However, semicrystalline samples cooled in d.s.c. show double glass transition temperatures. From these results, it is suggested that the blends of PEEK and PEI are miscible in the amorphous state and partially miscible in the semicrystalline state. From the measured degree of crystallinity (Xc) and specific heat increment (ΔCp) at Tg, the rigid amorphous fraction (Xr) for the semicrystalline PEEK-PEI blends was calculated and found to be 0.117-0.358 with cooling rates in d.s.c. The effect of cooling rate and PEI composition on the rigid amorphous fraction (Xr) of PEEK in the PEEK-PEI blends are discussed.

KW - Poly(ether ether ketone)

KW - Poly(ether imide)

KW - Rigid amorphous fraction

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U2 - 10.1016/s0032-3861(97)85599-1

DO - 10.1016/s0032-3861(97)85599-1

M3 - Article

AN - SCOPUS:0031146358

SN - 0032-3861

VL - 38

SP - 2657

EP - 2663

JO - Polymer

JF - Polymer

IS - 11

ER -

Glass transition temperatures and rigid amorphous fraction of poly(ether ether ketone) and poly(ether imide) blends

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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