Fracture behavior of polycarbonate/polyestercarbonate blends

Yong Bum Lee; Choon Soo Lee; Dae Sik Kim; Jong Hyun Kim; Jae Young Jho; Sang Soo Lee

doi:10.7317/pk.2011.35.6.537

Fracture behavior of polycarbonate/polyestercarbonate blends

Yong Bum Lee, Choon Soo Lee, Dae Sik Kim, Jong Hyun Kim, Jae Young Jho, Sang Soo Lee

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

Abstract

Fracture behaviors of polycarbonate (PC)/polyestrercarbonate (PEC) blends and their miscibility have been examined to find out the mechanism of ductilie-brittle transition of fracture behavior which would be a main governing factor on the thickness sensitivity of impact strength of PC. T_g measurement showed that PEC with a carbonate content higher than 30 mol% was miscible with PC. In the notched Izod impact test of PC, ductile-brittle transition occurred in the range of 4 to 5 mm thickness. The impact strength of miscible PC/PEC5 blends ductile-fractured in the thin specimens decreased with increasing PEC5 content, which was in accordance with the decrease of elongation at break in tensile test. In the brittle fracture of the thick specimens, the impact strength was well correlated with the plastic zone size in the vicinity of the notch tip.

Original language	English
Pages (from-to)	537-542
Number of pages	6
Journal	Polymer (Korea)
Volume	35
Issue number	6
DOIs	https://doi.org/10.7317/pk.2011.35.6.537
Publication status	Published - 2011 Nov

Keywords

Blend
Ductile-brittle transition
Polycarbonate
Polyestercarbonate
Thickness sensitivity

ASJC Scopus subject areas

General Chemical Engineering
Polymers and Plastics
Materials Chemistry

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title = "Fracture behavior of polycarbonate/polyestercarbonate blends",

abstract = "Fracture behaviors of polycarbonate (PC)/polyestrercarbonate (PEC) blends and their miscibility have been examined to find out the mechanism of ductilie-brittle transition of fracture behavior which would be a main governing factor on the thickness sensitivity of impact strength of PC. Tg measurement showed that PEC with a carbonate content higher than 30 mol% was miscible with PC. In the notched Izod impact test of PC, ductile-brittle transition occurred in the range of 4 to 5 mm thickness. The impact strength of miscible PC/PEC5 blends ductile-fractured in the thin specimens decreased with increasing PEC5 content, which was in accordance with the decrease of elongation at break in tensile test. In the brittle fracture of the thick specimens, the impact strength was well correlated with the plastic zone size in the vicinity of the notch tip.",

keywords = "Blend, Ductile-brittle transition, Polycarbonate, Polyestercarbonate, Thickness sensitivity",

author = "Lee, {Yong Bum} and Lee, {Choon Soo} and Kim, {Dae Sik} and Kim, {Jong Hyun} and Jho, {Jae Young} and Lee, {Sang Soo}",

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AU - Lee, Yong Bum

AU - Lee, Choon Soo

AU - Kim, Dae Sik

AU - Kim, Jong Hyun

AU - Jho, Jae Young

AU - Lee, Sang Soo

PY - 2011/11

Y1 - 2011/11

N2 - Fracture behaviors of polycarbonate (PC)/polyestrercarbonate (PEC) blends and their miscibility have been examined to find out the mechanism of ductilie-brittle transition of fracture behavior which would be a main governing factor on the thickness sensitivity of impact strength of PC. Tg measurement showed that PEC with a carbonate content higher than 30 mol% was miscible with PC. In the notched Izod impact test of PC, ductile-brittle transition occurred in the range of 4 to 5 mm thickness. The impact strength of miscible PC/PEC5 blends ductile-fractured in the thin specimens decreased with increasing PEC5 content, which was in accordance with the decrease of elongation at break in tensile test. In the brittle fracture of the thick specimens, the impact strength was well correlated with the plastic zone size in the vicinity of the notch tip.

AB - Fracture behaviors of polycarbonate (PC)/polyestrercarbonate (PEC) blends and their miscibility have been examined to find out the mechanism of ductilie-brittle transition of fracture behavior which would be a main governing factor on the thickness sensitivity of impact strength of PC. Tg measurement showed that PEC with a carbonate content higher than 30 mol% was miscible with PC. In the notched Izod impact test of PC, ductile-brittle transition occurred in the range of 4 to 5 mm thickness. The impact strength of miscible PC/PEC5 blends ductile-fractured in the thin specimens decreased with increasing PEC5 content, which was in accordance with the decrease of elongation at break in tensile test. In the brittle fracture of the thick specimens, the impact strength was well correlated with the plastic zone size in the vicinity of the notch tip.

KW - Blend

KW - Ductile-brittle transition

KW - Polycarbonate

KW - Polyestercarbonate

KW - Thickness sensitivity

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Fracture behavior of polycarbonate/polyestercarbonate blends

Abstract

Keywords

ASJC Scopus subject areas

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