高分子材料工程专业英语第二版课文翻译基本全了

3 不会引发聚合反应。按照上述反应为了能形成 BF3- 络合物和引发剂离子水或乙醇是必需的。但是不应将水或乙醇描述成“助催化剂”。 Just as by radical polymerization, one can also prepare copolymers by ionic polymerization, for example, anionic copolymers of styrene and butadiene, or cationic copolymers of isobutylene and styrene, or isobutylene and viny ethers, etc. As has been described in detail with radical polymerization, one can characterize each monomer pair by so-called reactivity ratios r1 and r2. The actual values of these two parameters are, however, different from those used for radical copolymerization. 正与自由基聚合反应一样,通过离子聚合反应也能制备共聚物,例如,苯乙烯- 丁二烯阴离子共聚物, 或异丁烯- 苯乙烯阳离子共聚物, 或异丁烯- 乙烯基醚共聚物, 等等。正如对自由基型聚合已经详细描述过那样,人们可以用所谓的竞聚率 r1和 r2 来表征每单体对。然而,这两个参数的实际意义不同于那些用于自由基共聚合反应的参数。---Vollmert B. Polymer Chemistry. Berlin: Sping-Verlag, 1973.163 高分子专业英语选讲课文翻译资料 9