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- Title
Effect of electron beam radiation on tensile and viscoelastic properties of styrenic block copolymers.
- Authors
Wu, Jinping; Soucek, Mark D.; Cakmak, Mukerrem
- Abstract
The effect of electron beam (E-beam) radiation on a series of styrenic block copolymers (SBCs) was investigated. These SBCs included newly developed poly(styrene- block-isoprene/butadiene- block-styrene) (SIBS), poly(styrene- block-butadiene- block-styrene) (SBS), and poly(styrene- block-isoprene- block-styrene) (SIS). The tensile properties, stress relaxation, molecular weight, and dynamical mechanical properties were studied. Generally, the crosslink density and tensile moduli of SBCs increased with increasing of E-beam radiation dose. The tensile strength of SIBS and SIS was shown to first decrease at lower E-beam radiation dose (<120 kGy) and then increase at higher radiation dose (>190 kGy). The tensile strength of SBS was significantly decreased at high E-beam radiation dose (>190 kGy). This was attributed to the differences between entanglement before E-beam radiation and the homogeneity of the crosslink network after exposure. POLYM. ENG. SCI., 54:2979-2988, 2014. © 2014 Society of Plastics Engineers
- Subjects
ELECTRON beams; RADIATION; COPOLYMERS; VISCOELASTICITY; SOLID mechanics; STYRENE
- Publication
Polymer Engineering & Science, 2014, Vol 54, Issue 12, p2979
- ISSN
0032-3888
- Publication type
Article
- DOI
10.1002/pen.23859