Min, SS Lee, SS Jho, JY 2024-01-21T11:34:52Z 2024-01-21T11:34:52Z 2021-09-04 2001-12 0142-9418 https://pubs.kist.re.kr/handle/201004/140015 The relation between chain structure and ductile-brittle transition (DBT) in polyestercarbonates (PEC) was investigated by measuring the fracture energy and observing the fracture surfaces of a homologous series of PEC containing phthalate units. DBTs were determined in terms of various test conditions including specimen thickness, test speed, and notch-tip radius. With an increase in the phthalate content, transition was found to shift to a thinner specimen, a lower test speed, and a higher notch-tip radius. It was concluded that the DBT is directly affected by the extent of entanglement in these copolymers. (C) 2001 Elsevier Science Ltd. All rights reserved. English ELSEVIER SCI LTD POLYMERIC SYSTEMS ENTANGLEMENT DEFORMATION PARAMETERS TOUGHNESS DENSITY Effect of chain structure on ductile-brittle transition in some polyestercarbonates Article 10.1016/S0142-9418(01)00012-5 1 POLYMER TESTING, v.20, no.8, pp.855 - 859 POLYMER TESTING 20 8 855 859 scie scopus 000171243000004 2-s2.0-0034851554 Materials Science, Characterization & Testing Polymer Science Materials Science Polymer Science Article POLYMERIC SYSTEMS ENTANGLEMENT DEFORMATION PARAMETERS TOUGHNESS DENSITY ductile-brittle transition polyestercarbonates chain structure