Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/22455
Title: Mechanical spectrum study of glass transition by a composite method
Authors: Yuan, YH
Zhang, L
Wang, XL
Ying, XN
Yan, F 
Huang, YN
Zhu, JS
Wang, YN
Keywords: Glass transition
Internal friction
Mechanical spectrum
Polymer
Issue Date: 2009
Publisher: Elsevier Science Bv
Source: Physica b : condensed matter, 2009, v. 404, no. 20, p. 3771-3774 How to cite?
Journal: Physica B: Condensed Matter 
Abstract: Normalized mechanical spectra of glycerol, 1,2-propanediol carbonate and poly(vinyl chloride)/di(2-ethyl-hexyl) phthalate (PVC/DOP) blends were studied in the temperature range from 100 to 300 K by a composite method. The dynamic glass transition was observed, which exhibits a peak of temperature-dependent loss modulus. The peak moves toward higher temperature with higher measuring frequency, which accords with the relaxation feature of the dynamic glass transition. Another characteristic temperature can be marked in the mechanical spectrum by the onset of storage modulus change, which is labeled as T gm. T gm is found to be nearly equal to the calorimetric glass transition temperature in glycerol, 1,2-propanediol carbonate and di(2-ethyl-hexyl) phthalate. As we expected, this onset temperature in the mechanical spectrum has an intimate relation with the calorimetric glass transition of materials, and it can be regarded as a representative when the calorimetric glass transition temperature is not available. Finally, normalized mechanical spectra of PVC/DOP blends with different PVC content were obtained and mechanical glass transition temperatures T gm were determined.
URI: http://hdl.handle.net/10397/22455
DOI: 10.1016/j.physb.2009.06.142
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