| 摘要 |
Extrudable (per)fluoroelastomer compositions comprising crosslinkable (per)fluoroelastomers having: at least two glass transition temperatures Tg on DSC analysis, at least one melting peak on DSC analysis with a &Dgr;H of second melting of between 0.3 and 5.5 J/g, and a bimodal molecular weight distribution such that the ratio Mn1/Mn2 is between 10 and 30, wherein Mn1 represents the number-average molecular weight of the distribution of the high molecular weight fluoroelastomer and Mn2 represents the number-average molecular weight of the distribution of the low molecular weight fluoroelastomer. |
