Evaluation of interfacial region of microphase-separated SEBS using modulated differential scanning calorimetry and dynamic mechanical thermal analysis

Karode, Nireeksha S. and Poudel, Anup and Fitzhenry, Laurence and Matthews, Siobhán and Walsh, Philip R. and Coffey, Austin B. (2017) Evaluation of interfacial region of microphase-separated SEBS using modulated differential scanning calorimetry and dynamic mechanical thermal analysis. Polymer Testing, 62. pp. 268-277. ISSN 0142-9418

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Abstract

The continuous structural changes of Poly(styrene-b-ethylene-butylene-b-styrene) [SEBS] due to the effect of temperature are hard to evaluate using conventional differential scanning calorimetry (DSC). This paper presents an accurate and simple way to evaluate microstructural and glass transitions of SEBS using modulated differential scanning calorimetry (MDSC). The weak crystalline nature of –(CH2-CH2)–n in the ethylene-butylene (EB) block melted around 36 °C. The premature molecular moment and Tg of the styrene block were at 62 °C and 96 °C, respectively. The interfacial region at high temperature was explained with respect to order-order transition (OOT) at 144 °C and a prominent Order-Disorder Transition (ODT) at around 202 °C. Dynamic mechanical thermal analysis (DMTA) and dynamic mechanical rheological testing (DMRT) measurements also revealed that the Tg of the PS transition were consistent at around 96 °C.

Item Type:	Article
Additional Information:	Funding Information: The authors wish to acknowledge the Institutes of Technology of Ireland (IOTI) Research Scholarship Programme, Science Foundation Ireland and Irish Research Council (Project ID: GOIPG/2016/1498) for financial assistance. Special thanks to the South Eastern Applied Materials Research Centre (SEAM), the Pharmaceutical and Molecular Biotechnology Research Centre (PMBRC) and the Convergent Technologies Research Group (CTRG) at Waterford Institute of Technology, Ireland for their support throughout the work. Publisher Copyright: © 2017 Elsevier Ltd
Uncontrolled Keywords:	/dk/atira/pure/subjectarea/asjc/1600/1605
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Depositing User:	Admin SSL
Date Deposited:	19 Oct 2022 23:03
Last Modified:	07 Jun 2023 18:42
URI:	http://repository-testing.wit.ie/id/eprint/3798

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