| 摘要 |
<p>This invention describes chemical modifications of aromatic groups in end-blocks of triblock thermoplastic elastomers, e.g. Kraton® G, to increase the upper service temperature and to decrease the amount of compression set when compared to the unmodified parent copolymer. The polystyrene end-block of Kraton® G were nitrated yielding materials having Tg's as high as 148 °C, compression set values as low as 68 % and stress to break values as high as 10.5 MPa when measured at 65 °C. The nitrated polymers exhibit self-curing characteristics during molding.</p> |
