自由基聚合中扩散效应分析

自由基聚合扩散效应包括“笼蔽效应”、凝胶效应和玻璃化效应,本文以聚合物大分子扩散理论发展为线索,首先讨论了基于粘度理论、标度理论、链缠结理论、自由体积理论等从宏观尺度描述自由基聚合扩散效应的模型,然后深入到微观分子尺度,从初级自由基的扩散行为讨论了“笼蔽效应”,基于增长自由基的三种扩散行为解释了凝胶效应和玻璃化效应,最后简单介绍了其他理论模型,并对理论未来的发展进行了展望。

The Effect of Diffusion on Radical Polymerization

The effect of diffusion on radical polymerization is discussed from the microscopic level to the macroscopic level.Diffusion theory of micromolecule and macromolecules is narrated and is considered as the clue which illuminate the model about diffusion phenomenon in radical polymerization.Viscosity model,Scaling Theory model or Entanglament Theory model,Free Volume model and other models based on the level of microscopic molecule are discussed.