Morphology and crack resistance behavior of binary block copolymer blends |
| |
Authors: | R AdhikariR Lach GH MichlerR Weidisch W GrellmannK Knoll |
| |
Affiliation: | a Institute of Materials Science, Martin-Luther University, Halle-Wittenberg, D-06099 Halle/Saale, Germany b BASF Aktiengesellschaft, Polymer Research Laboratory, ZKT/I-B1, D-67056 Ludwigshafen, Germany |
| |
Abstract: | Fracture behavior of binary blends comprising of styrene-butadiene block copolymers having star and triblock architectures was studied via instrumented Charpy impact test. The toughness of the ductile blends was characterized by dynamic crack resistance curves (R-curves).This study represents a systematic investigation of crack resistance behavior of nanometer structured binary block copolymer blends and the development of a new material with a combination of high toughness and transparency, usually not observed in incompatible polymer blends. While the lamellar star block copolymer shows an elastic behavior (small-scale yielding and unstable crack growth), adding of 20 wt% of the triblock copolymer leads to a stable crack growth and at 60 wt% of the triblock copolymer the strong increase of toughness values indicate a tough/high-impact transition, demonstrating the existence of novel toughening concepts for polymers based on nanometer structured materials. |
| |
Keywords: | Block copolymer blends Charpy impact testing R-curves |
本文献已被 ScienceDirect 等数据库收录! |
|