Quantifying Polymer Swelling Employing a Linear Variable Differential Transformer: CO 2  Effects on SBS Triblock Copolymer | Zendy

Shenoy Suresh | Zendy; Woerdeman Dara | Zendy; Sebra Robert | Zendy; GarachDomech Alberto | Zendy; Wynne Kenneth J. | Zendy

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Quantifying Polymer Swelling Employing a Linear Variable Differential Transformer: CO 2 Effects on SBS Triblock Copolymer

Author(s) -

Shenoy Suresh,

Woerdeman Dara,

Sebra Robert,

GarachDomech Alberto,

Wynne Kenneth J.

Publication year - 2003

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/marc.200290007

Subject(s) - materials science , swelling , composite material , linear variable differential transformer , polystyrene , copolymer , polybutadiene , polymer , elastomer , toughness , polymer chemistry , transformer , physics , distribution transformer , quantum mechanics , voltage

A linear variable differential transformer (LVDT) was employed to evaluate CO 2 ‐polymer plasticization. Preliminary results on polystyrene‐ block ‐polybutadiene‐ block ‐polystyrene (SBS) elastomer are presented. At 22 °C under CO 2 pressure, SBS undergoes compression due to hydrostatic pressure. However, sample expansion occurs upon depressurization. At 45 °C, SBS undergoes swelling of 0.7% due to CO 2 plasticization, while no post‐pressurization expansion is observed. The contrasting result is explained by change in PS domain mobility and discontinuity in the density‐pressure relationship.Linear displacement of SBS as a function of time at 56 and 134 bar CO 2 .

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