| 摘要 |
The present invention relates to high-molecular weight aromatic polycarbonates, based on diphenols and monofunctional chain stoppers, corresponding to the formula (I) <IMAGE> (I) in which Z denotes the radical of a diphenol, n denotes an integer from about 20 to 400, E denotes <IMAGE> wherein m denotes 0 or 1 and R denotes H or C1-C3-alkyl. The present invention also relates to a process for the preparation of the polycarbonates of the formula (I) comprising reacting diphenols of the formula (II) HO-Z-OH (II) wherein Z is a divalent aromatic radical, and/or their chlorocarbonic acid esters in accordance with the processes which are known for the preparation of polycarbonates, in a homogeneous or heterogeneous phase system, with compounds of the formula (III) <IMAGE> (III) wherein m denotes 0 or 1 and R denotes H or C1-C3-alkyl. The present invention also relates to a process for cross-linking the polycarbonates of the formula (I) with UV light, after adding a photoinitiator and, optionally, flameproofing and photo-reducing agents. Finally, the present invention relates to the cross-linked polycarbonates obtained via this process. |
