Essential work of fracture (EWF) analysis for compression molded alternating polypropylene carbonate

K. L. Fung; H. X. Zhao; J. T. Wang; Y. Z. Meng; S. C. Tjong; R. K Y Li

doi:10.1002/pen.20052

Essential work of fracture (EWF) analysis for compression molded alternating polypropylene carbonate

K. L. Fung, H. X. Zhao, J. T. Wang, Y. Z. Meng, S. C. Tjong, R. K Y Li

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

10 Citations (Scopus)

Abstract

In this investigation, the main objective was to study the mechanical properties of alternating poly(propylene carbonate) copolymer (PPC). The PPC used in this study was derived from propylene oxide and carbon dioxide using zinc glutarate as catalyst. The molecular weight of the PPC copolymer used in this study has M_n∼33,000. The synthesized PPC was compression molded into sheets of thickness ∼1mm. The fracture toughness of the PPC films was determined using the essential work of fracture (EWF) technique, at a laboratory temperature of 20°C, and a loading rate of 1 mm/min. During the EWF measurement, a significant amount of plastic deformation has taken place around the initial ligament region. The measured specific total fracture work (w_f) was observed to vary in a linear fashion with the specimen ligament (l), and hence satisfied the basic requirement for EWF analysis. The specific essential fracture work (w_e) for the PPC film was measured to be 11.0 kJ/m². The PPC showed a prominent recovery behavior. The severely deformed region surrounding the fracture ligament was observed to recover completely 8 days after fracture testing. © 2004 Society of Plastics Engineers.

Original language	English
Pages (from-to)	580-587
Journal	Polymer Engineering and Science
Volume	44
Issue number	3
DOIs	https://doi.org/10.1002/pen.20052
Publication status	Published - Mar 2004

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title = "Essential work of fracture (EWF) analysis for compression molded alternating polypropylene carbonate",

abstract = "In this investigation, the main objective was to study the mechanical properties of alternating poly(propylene carbonate) copolymer (PPC). The PPC used in this study was derived from propylene oxide and carbon dioxide using zinc glutarate as catalyst. The molecular weight of the PPC copolymer used in this study has Mn∼33,000. The synthesized PPC was compression molded into sheets of thickness ∼1mm. The fracture toughness of the PPC films was determined using the essential work of fracture (EWF) technique, at a laboratory temperature of 20°C, and a loading rate of 1 mm/min. During the EWF measurement, a significant amount of plastic deformation has taken place around the initial ligament region. The measured specific total fracture work (wf) was observed to vary in a linear fashion with the specimen ligament (l), and hence satisfied the basic requirement for EWF analysis. The specific essential fracture work (we) for the PPC film was measured to be 11.0 kJ/m2. The PPC showed a prominent recovery behavior. The severely deformed region surrounding the fracture ligament was observed to recover completely 8 days after fracture testing. {\textcopyright} 2004 Society of Plastics Engineers.",

author = "Fung, {K. L.} and Zhao, {H. X.} and Wang, {J. T.} and Meng, {Y. Z.} and Tjong, {S. C.} and Li, {R. K Y}",

year = "2004",

month = mar,

doi = "10.1002/pen.20052",

language = "English",

volume = "44",

pages = "580--587",

journal = "Polymer Engineering and Science",

issn = "0032-3888",

publisher = "John Wiley & Sons",

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TY - JOUR

T1 - Essential work of fracture (EWF) analysis for compression molded alternating polypropylene carbonate

AU - Fung, K. L.

AU - Zhao, H. X.

AU - Wang, J. T.

AU - Meng, Y. Z.

AU - Tjong, S. C.

AU - Li, R. K Y

PY - 2004/3

Y1 - 2004/3

N2 - In this investigation, the main objective was to study the mechanical properties of alternating poly(propylene carbonate) copolymer (PPC). The PPC used in this study was derived from propylene oxide and carbon dioxide using zinc glutarate as catalyst. The molecular weight of the PPC copolymer used in this study has Mn∼33,000. The synthesized PPC was compression molded into sheets of thickness ∼1mm. The fracture toughness of the PPC films was determined using the essential work of fracture (EWF) technique, at a laboratory temperature of 20°C, and a loading rate of 1 mm/min. During the EWF measurement, a significant amount of plastic deformation has taken place around the initial ligament region. The measured specific total fracture work (wf) was observed to vary in a linear fashion with the specimen ligament (l), and hence satisfied the basic requirement for EWF analysis. The specific essential fracture work (we) for the PPC film was measured to be 11.0 kJ/m2. The PPC showed a prominent recovery behavior. The severely deformed region surrounding the fracture ligament was observed to recover completely 8 days after fracture testing. © 2004 Society of Plastics Engineers.

AB - In this investigation, the main objective was to study the mechanical properties of alternating poly(propylene carbonate) copolymer (PPC). The PPC used in this study was derived from propylene oxide and carbon dioxide using zinc glutarate as catalyst. The molecular weight of the PPC copolymer used in this study has Mn∼33,000. The synthesized PPC was compression molded into sheets of thickness ∼1mm. The fracture toughness of the PPC films was determined using the essential work of fracture (EWF) technique, at a laboratory temperature of 20°C, and a loading rate of 1 mm/min. During the EWF measurement, a significant amount of plastic deformation has taken place around the initial ligament region. The measured specific total fracture work (wf) was observed to vary in a linear fashion with the specimen ligament (l), and hence satisfied the basic requirement for EWF analysis. The specific essential fracture work (we) for the PPC film was measured to be 11.0 kJ/m2. The PPC showed a prominent recovery behavior. The severely deformed region surrounding the fracture ligament was observed to recover completely 8 days after fracture testing. © 2004 Society of Plastics Engineers.

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U2 - 10.1002/pen.20052

DO - 10.1002/pen.20052

M3 - RGC 21 - Publication in refereed journal

SN - 0032-3888

VL - 44

SP - 580

EP - 587

JO - Polymer Engineering and Science

JF - Polymer Engineering and Science

IS - 3

ER -

Essential work of fracture (EWF) analysis for compression molded alternating polypropylene carbonate

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