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Effect of Epoxidation of Diene Component of SBS Block Copolymer on Morphology and Mechanical Properties |
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| Authors: | Rajesh Pandit Jyoti Giri Goerg H. Michler Ralf Lach Wolfgang Grellmann Boulos Youssef Jean Marc Saiter Rameshwar Adhikari |
| Affiliation: | 1. Tribhuvan University, Central Department of Chemistry, Kirtipur, Kathmandu, Nepal;2. Martin-Luther University Halle-Wittenberg, Institute of Physics, 06099 Halle/Saale, Germany;3. Martin-Luther University Halle-Wittenberg, Centre of Engineering, 06099 Halle/Saale, Germany Institut für Polymerwerkstoffe, Geusaer Str. Geb. 131, 06217 Merseburg, Germany;4. AMME-LECAP International Lab EA 4528 Université de Rouen, 76801 Saint Etienne du Rouvray cedex, France INSA de Rouen, 76801 Saint Etienne du Rouvray cedex, France;5. AMME-LECAP International Lab EA 4528 Université de Rouen, 76801 Saint Etienne du Rouvray cedex, France |
| Abstract: | In this work, the polybutadiene (PB) block of an asymmetric lamellae forming polystyrene/polybutadiene based triblock copolymer was epoxidized to different extent in order to study its effect on morphology and mechanical behaviour of the copolymer. The products were analyzed by means of different microscopic techniques, Fourier transform infrared (FTIR) spectroscopy and microhardness measurements. It was found that the microphase separation behavior and hence the mechanical properties of the materials were drastically altered through epoxidation of the diene block of the styrene/diene triblock copolymer. With the increase in the extent of epoxidation the lamellar structure changed to distorted lamellae and then to disordered domains. Consequently, inhomogeneous mechanical performance of the samples was observed at higher degree of chemical modification. |
| Keywords: | block copolymer electron microscopy epoxidation FTIR mechanical properties SBS |