| 摘要 |
A clear, cast acrylic sheet of improved impact strength may be prepared by dispersing or dissolving 8-14% of an ABA block copolymer, (where A is styrene, B is a hydrogenated butadiene, containing a large 1-2 butadiene fraction) in a methyl methacrylate casting mixture which contains 0.1- 20% styrene, and polymerizing in sheet form by heating with free-radical initiators.
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