Objective: to prepare the low molecular weight chitosan and establish the method for quality control.

中文摘要：目的：制备低分子质量的壳聚糖并建立相应的质量控制手段。

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For solving the difficulty in the control of molecular weight distribution (MWD) of polymer product, MWD via neural network without any transcendental information is modelled.

为了解决聚合产品分子量分布控制的难题，将神经网络引入对其进行了无需任何系统内部先验知识的黑箱建模。

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When the curing extent was about 60 percent, the molecular weight raised rapidly and diffusion control was incorporated to describe the cure in the latter stages.

当反应程度达到60%左右后，由于交联程度增加，分子质量迅速增大，分子间扩散较慢，进入反应的第二阶段，主要由扩散作用控制固化速率。

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