P1
Investigation of Structure- Property Relationship in Diblock Poly(alloocimene-b-isobutylene) Thermoplastic Elastomers
ANDREW MCCLAIN1, ATTILA L. GERGELY1, JUDIT E. PUSKAS1,2
1The University of Akron, Department of Chemical and Biomolecular Engineering, Akron, OH.
2The University of Akron, Department of Polymer Science, Akron, OH.
Tel: 330-972-6203, Email:jpuskas@uakron.edu
ABSTRACT
The tensile properties of diblock poly(alloocimene-b-isobutylene) copolymer thermoplastic elastomers are investigated against composition. Samples were taken during a living copolymerization of alloocimene and isobutylene at different times. The first sample containing 56 wt% hard segment, polyalloocimene, showed plastic behavior, exhibiting 10 MPa modulus and 20 % elongation at break. Upon the decrease of the wt% of the hard segment the material become more elastomeric and the last sample containing 12 wt% polyalloocimene showed 2 MPa ultimate tensile strength with 800 % elongation at break. The modulus of the sample decreased to 0.5 MPa. XRD data showed strain induced crystallization, explaining the strain hardening phenomena in the tensile properties.