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Model of hyperbranched polymers prepared via polymerization of AB2 and core C3 monomers in a continuous-stirred tank reactor
Chemical Engineering Research and Design ( IF 3.7 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.cherd.2019.12.026
Kuo-Chung Cheng

The formation of hyperbranched polymers (HBPs) generated by the stepwise polymerization of AB2 monomers with the addition of trifunctional core monomers in a continuous-stirred tank reactor, CSTR, was investigated by a kinetic model. The dependency of the degree of polymerization (DP), the degree of branching (DB), and conversion on the Damköhler number (Da) were calculated by a generating function method. When using the polymerization system without the core monomers, the process could be halted due to the production of larger molecules at the conversion of group A, α(A), of approximately 0.44. The addition of core monomers with high reactivity in the CSTR could retard the growth of polymers. Consequently, the reduced weight-average DP and DB could reach 1000 and 0.51, respectively, at a high α(A) of 0.91. Moreover, the amount of unreacted monomers remaining in the flow exiting the CSTR was much less than that without the addition of the core monomers.



中文翻译:

在连续搅拌釜反应器中通过AB 2和核心C 3单体聚合制备的超支化聚合物模型

AB 2逐步聚合生成的超支化聚合物(HBP)的形成通过动力学模型研究了在连续搅拌釜式反应器CSTR中添加三官能核单体的单体。通过生成函数法计算聚合度(DP),支化度(DB)和转化率对Damköhler数(Da)的依赖性。当使用不带核单体的聚合体系时,由于在A组的转化率约为0.44的较大分子的产生,该过程可能会停止。在CSTR中添加具有高反应活性的核心单体可能会延迟聚合物的生长。因此,在0.91的高α(A)时,降低的重均DP和DB可以分别达到1000和0.51。此外,

更新日期:2020-01-07
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