Abstract
The deformation behaviour of bisphenol A polycarbonate containing only a small amount of oligoionomeric additives in the range of a few parts per hundred parts of resin was examined. The impact strength of polycarbonate markedly decreased as the content of additive increased, and brittle fracture of polycarbonate was observed in tensile tests when the concentration of additive was above 2.5 phr. The ductile-to-brittle transition that was determined using a comparison of the critical shear yield stress and the critical craze stress appeared to exist in the range of 2.5-3.5 phr of additive. The measured entanglement density was also found to decrease significantly with the addition of a few parts per hundred parts of resin of additives, and the change of the dominant deformation mechanism from ductile to brittle failure was recognized as a result of the change of the entanglement density of polycarbonate. Therefore, it was concluded that the presence of a small amount of ionomeric additives caused the loss of entanglement density that induced transition of the deformation mechanism of polycarbonate from ductile to brittle failure and led to the corresponding deterioration of impact strength.
| Original language | English |
|---|---|
| Pages (from-to) | 2635-2643 |
| Number of pages | 9 |
| Journal | Journal of Polymer Science, Part B: Polymer Physics |
| Volume | 39 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 2001 Nov 1 |
| Externally published | Yes |
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Keywords
- Additives
- Antiplasticization
- Brittle-ductile transition
- Deformation
- Fracture
- Polycarbonates
ASJC Scopus subject areas
- Polymers and Plastics
- Materials Chemistry
Cite this
Effect of ionic additives on deformation behaviour of bisphenol a polycarbonate. / Lee, Sang-Soo; Cho, Kilwon; Kim, Joonkyung.
In: Journal of Polymer Science, Part B: Polymer Physics, Vol. 39, No. 21, 01.11.2001, p. 2635-2643.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of ionic additives on deformation behaviour of bisphenol a polycarbonate
AU - Lee, Sang-Soo
AU - Cho, Kilwon
AU - Kim, Joonkyung
PY - 2001/11/1
Y1 - 2001/11/1
N2 - The deformation behaviour of bisphenol A polycarbonate containing only a small amount of oligoionomeric additives in the range of a few parts per hundred parts of resin was examined. The impact strength of polycarbonate markedly decreased as the content of additive increased, and brittle fracture of polycarbonate was observed in tensile tests when the concentration of additive was above 2.5 phr. The ductile-to-brittle transition that was determined using a comparison of the critical shear yield stress and the critical craze stress appeared to exist in the range of 2.5-3.5 phr of additive. The measured entanglement density was also found to decrease significantly with the addition of a few parts per hundred parts of resin of additives, and the change of the dominant deformation mechanism from ductile to brittle failure was recognized as a result of the change of the entanglement density of polycarbonate. Therefore, it was concluded that the presence of a small amount of ionomeric additives caused the loss of entanglement density that induced transition of the deformation mechanism of polycarbonate from ductile to brittle failure and led to the corresponding deterioration of impact strength.
AB - The deformation behaviour of bisphenol A polycarbonate containing only a small amount of oligoionomeric additives in the range of a few parts per hundred parts of resin was examined. The impact strength of polycarbonate markedly decreased as the content of additive increased, and brittle fracture of polycarbonate was observed in tensile tests when the concentration of additive was above 2.5 phr. The ductile-to-brittle transition that was determined using a comparison of the critical shear yield stress and the critical craze stress appeared to exist in the range of 2.5-3.5 phr of additive. The measured entanglement density was also found to decrease significantly with the addition of a few parts per hundred parts of resin of additives, and the change of the dominant deformation mechanism from ductile to brittle failure was recognized as a result of the change of the entanglement density of polycarbonate. Therefore, it was concluded that the presence of a small amount of ionomeric additives caused the loss of entanglement density that induced transition of the deformation mechanism of polycarbonate from ductile to brittle failure and led to the corresponding deterioration of impact strength.
KW - Additives
KW - Antiplasticization
KW - Brittle-ductile transition
KW - Deformation
KW - Fracture
KW - Polycarbonates
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UR - http://www.scopus.com/inward/citedby.url?scp=0035504809&partnerID=8YFLogxK
U2 - 10.1002/polb.10025
DO - 10.1002/polb.10025
M3 - Article
VL - 39
SP - 2635
EP - 2643
JO - Journal of Polymer Science, Part B: Polymer Physics
JF - Journal of Polymer Science, Part B: Polymer Physics
SN - 0887-6266
IS - 21
ER -