用红外光谱技术对淀粉/聚乙烯共混物降解过程中的结晶度变化进行跟踪测试，并与X射线衍射结果进行对比分析.实验结果表明，两种方法测得的结晶度的相对误差不超过10%.因此用红外光谱法可以准确地测量试样在降解过程中的结晶度变化.并结合热重分析探索了红外光谱技术用于共混试样降解过程中淀粉质量含量测试的可行性与可靠性.
The crystalline parameters of PE/starch blends have beenevaluated by FTIR as a function of thermo-oxidative aging time. It is found that the relative error is not more than 10% in comparison with that obtained from XRD measurement. FTIR technique is also tested to estimate the mass change of starch in degradation.
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