ABSTRACT

Effects of laser irradiation on the thermal properties and morphological structure of starch, polyvinyl alcohol (PVA) and their blends were studied. Laser irradiation has an insignificant effect on the thermal behaviour of starch and PVA, but it causes an increase in crystallization and melting temperature (T _cry and T_m ) for blends as a function of irradiation time. Thermogravimetric analysis (TGA) further indicates breakdown of the intermolecular attractive forces on laser irradiation, causing a decrease in the blend homogeneity. Fourier infrared spectroscopic (FTIR) and scanning electron microscopic (SEM) studies corroborate the above findings.

中文翻译：

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激光诱导的聚乙烯醇/淀粉共混物的改性

摘要

研究了激光辐照对淀粉，聚乙烯醇（PVA）及其混合物的热学性质和形态结构的影响。激光辐照对淀粉和PVA的热行为影响不大，但是随着辐照时间的增加，掺混物的结晶和熔融温度（T _cry和T _m ）会增加。热重分析（TGA）进一步表明分子间吸引力在激光照射下的分解，导致共混物均匀性降低。傅里叶红外光谱（FTIR）和扫描电子显微镜（SEM）研究证实了上述发现。