| 摘要 |
<p>This invention relates to a multifunctional organic alkali metal initiator for preparation of various kinds of star polymers by anonic polymerization, a process for making the initiator, a process using said initiator for making star polymers and the polymers obtained. The initiator can be represented by the formula: Ma(RMe)a wherein M is selected from Sn, Ti, Al, Si and/or B; R is a hydrocabyl containing 8-100 carbon atoms, a = 1-3, b = 2.5-6.5, Me is an alkali metal which may be selected from Na and Li. The initiator was synthesised by reacting an organic alkali metal with a conjugated diene and/or a mono-olefin monomer, and then adding hetero-atom containing halide. The star polymer obtained has a radial molecular structure consisting of many macromonomer chain arms radiating from the initiator core, and its molecular weight distribution expressed by GPC presents a uniform singlet.</p> |
