Blends of amide-modified PBT and polycarbonate: transestrification and degradation

A.C.M. van Bennekom, A.C.M. van Bennekom, D.T. Pluimers, J. Bussink, R.J. Gaymans

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Abstract

Blends were made of polycarbonate (PC) and polybutylene terephthalate (PBT) or amide modified polybutylene terephthalate (PBTA). The blends were prepared by solution casting, solution precipitation and melt mixing. The transesterification interchange reactions were followed by1H n.m.r. analysis. The change in the glass transition temperature (Tg) of PC has been studied as function of blending conditions, the addition of titanate catalyst inactivator, the content of Li-residues and the molecular weight of the polymers. A correlation is made between the degree of transesterification and the lowering of the glass transition. Triphenyl phosphite (TPPi) (0–2.2 wt %) was used as titanate catalyst inactivator. TPPi was found to be an effective catalyst inactivator however, this low molecular weight compound has also a strong plasticizing effect on PC. A concentration of 0.5 wt% TPPi gave a good stabilization against transesterification. Without transesterification the PBTA was found to be less miscible with PC than PBT and the PC/PBTA blends had higher Tgs for the PC phase than PC/PBT and a higher melting temperature of the system.
Original languageUndefined
Pages (from-to)3017-
JournalPolymer
Volume38
Issue number12
DOIs
Publication statusPublished - 1997

Keywords

  • METIS-106366
  • IR-68424

Cite this

van Bennekom, A. C. M., van Bennekom, A. C. M., Pluimers, D. T., Bussink, J., & Gaymans, R. J. (1997). Blends of amide-modified PBT and polycarbonate: transestrification and degradation. Polymer, 38(12), 3017-. https://doi.org/10.1016/S0032-3861(96)00866-X
van Bennekom, A.C.M. ; van Bennekom, A.C.M. ; Pluimers, D.T. ; Bussink, J. ; Gaymans, R.J. / Blends of amide-modified PBT and polycarbonate: transestrification and degradation. In: Polymer. 1997 ; Vol. 38, No. 12. pp. 3017-.
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title = "Blends of amide-modified PBT and polycarbonate: transestrification and degradation",
abstract = "Blends were made of polycarbonate (PC) and polybutylene terephthalate (PBT) or amide modified polybutylene terephthalate (PBTA). The blends were prepared by solution casting, solution precipitation and melt mixing. The transesterification interchange reactions were followed by1H n.m.r. analysis. The change in the glass transition temperature (Tg) of PC has been studied as function of blending conditions, the addition of titanate catalyst inactivator, the content of Li-residues and the molecular weight of the polymers. A correlation is made between the degree of transesterification and the lowering of the glass transition. Triphenyl phosphite (TPPi) (0–2.2 wt {\%}) was used as titanate catalyst inactivator. TPPi was found to be an effective catalyst inactivator however, this low molecular weight compound has also a strong plasticizing effect on PC. A concentration of 0.5 wt{\%} TPPi gave a good stabilization against transesterification. Without transesterification the PBTA was found to be less miscible with PC than PBT and the PC/PBTA blends had higher Tgs for the PC phase than PC/PBT and a higher melting temperature of the system.",
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year = "1997",
doi = "10.1016/S0032-3861(96)00866-X",
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van Bennekom, ACM, van Bennekom, ACM, Pluimers, DT, Bussink, J & Gaymans, RJ 1997, 'Blends of amide-modified PBT and polycarbonate: transestrification and degradation' Polymer, vol. 38, no. 12, pp. 3017-. https://doi.org/10.1016/S0032-3861(96)00866-X

Blends of amide-modified PBT and polycarbonate: transestrification and degradation. / van Bennekom, A.C.M.; van Bennekom, A.C.M.; Pluimers, D.T.; Bussink, J.; Gaymans, R.J.

In: Polymer, Vol. 38, No. 12, 1997, p. 3017-.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Blends of amide-modified PBT and polycarbonate: transestrification and degradation

AU - van Bennekom, A.C.M.

AU - van Bennekom, A.C.M.

AU - Pluimers, D.T.

AU - Bussink, J.

AU - Gaymans, R.J.

PY - 1997

Y1 - 1997

N2 - Blends were made of polycarbonate (PC) and polybutylene terephthalate (PBT) or amide modified polybutylene terephthalate (PBTA). The blends were prepared by solution casting, solution precipitation and melt mixing. The transesterification interchange reactions were followed by1H n.m.r. analysis. The change in the glass transition temperature (Tg) of PC has been studied as function of blending conditions, the addition of titanate catalyst inactivator, the content of Li-residues and the molecular weight of the polymers. A correlation is made between the degree of transesterification and the lowering of the glass transition. Triphenyl phosphite (TPPi) (0–2.2 wt %) was used as titanate catalyst inactivator. TPPi was found to be an effective catalyst inactivator however, this low molecular weight compound has also a strong plasticizing effect on PC. A concentration of 0.5 wt% TPPi gave a good stabilization against transesterification. Without transesterification the PBTA was found to be less miscible with PC than PBT and the PC/PBTA blends had higher Tgs for the PC phase than PC/PBT and a higher melting temperature of the system.

AB - Blends were made of polycarbonate (PC) and polybutylene terephthalate (PBT) or amide modified polybutylene terephthalate (PBTA). The blends were prepared by solution casting, solution precipitation and melt mixing. The transesterification interchange reactions were followed by1H n.m.r. analysis. The change in the glass transition temperature (Tg) of PC has been studied as function of blending conditions, the addition of titanate catalyst inactivator, the content of Li-residues and the molecular weight of the polymers. A correlation is made between the degree of transesterification and the lowering of the glass transition. Triphenyl phosphite (TPPi) (0–2.2 wt %) was used as titanate catalyst inactivator. TPPi was found to be an effective catalyst inactivator however, this low molecular weight compound has also a strong plasticizing effect on PC. A concentration of 0.5 wt% TPPi gave a good stabilization against transesterification. Without transesterification the PBTA was found to be less miscible with PC than PBT and the PC/PBTA blends had higher Tgs for the PC phase than PC/PBT and a higher melting temperature of the system.

KW - METIS-106366

KW - IR-68424

U2 - 10.1016/S0032-3861(96)00866-X

DO - 10.1016/S0032-3861(96)00866-X

M3 - Article

VL - 38

SP - 3017-

JO - Polymer

JF - Polymer

SN - 0032-3861

IS - 12

ER -

van Bennekom ACM, van Bennekom ACM, Pluimers DT, Bussink J, Gaymans RJ. Blends of amide-modified PBT and polycarbonate: transestrification and degradation. Polymer. 1997;38(12):3017-. https://doi.org/10.1016/S0032-3861(96)00866-X