Kinetics of Anionic Polymerization of ?-Caprolactone (?CL). Propagation of Poly-?=CL-K Ion Pairs
Kinetics of Anionic Polymerization of ?-Caprolactone (?CL). Propagation of Poly-?=CL-K Ion Pairs
复制标题
ε-己内酯（εCL）的阴离子聚合动力学。
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
S. Penczek
中科院分区：
文献类型：
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作者：
S. Sosnowski;S. Slomkowski;S. Penczek
用量热法研究了在0~20 ° C温度范围内，以（CH3）3SiO-K+为引发剂，在THF溶液中进行ε-己内酯（eCL）阴离子聚合的动力学。根据动力学结果和电导测量活Poly-eCL − K+离子对的解离常数（KD 20 <$（4 ± 2）× 10 − 10 mol/L），我们得出结论，在上述条件下，活性中心的浓度范围为10 − 3至3.7 × 10 − 2 mol/L，传播在离子对上进行，并且既不被解离也不被更高聚集体的形成所干扰。对于在poly-eCL − K+上进行的eCL聚合，
Abstract Kinetics of the anionic polymerization of e-caprolactone (eCL) initiated with (CH3)3SiO−K+ and carried out in THF solution has been studied in the temperature range from 0 to 20°C by using a calorimetric method. From the kinetic results and from conductometric measurements of the dissociation constant of the living Poly-eCL−K+ ion pairs (KD 20 ≊ (4 ± 2) × 10−10 mol/L), we concluded that at the conditions indicated above and for concentrations of active centers ranging from 10−3 to 3.7 × 10−2 mol/L, propagation proceeds on the ion pairs and is disturbed neither by dissociation nor by the formation of higher aggregates. For the polymerization of eCL proceeding on the poly-eCL−K+