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首页> 外文期刊>Journal of Applied Polymer Science >Effect of the polyurethane crystalline interphase formed at an Al surface on water-vapor absorption
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Effect of the polyurethane crystalline interphase formed at an Al surface on water-vapor absorption

机译：在铝表面形成的聚氨酯结晶界面对水蒸气吸收的影响

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Water-vapor absorption of polyurethane/Al bonds was studied, and the weight gain of samples after water-vapor exposure was measured to examine the effect of the polyurethane crystalline interphase formed at the Al surface on water-vapor absorption. Water-vapor absorption was found to be independent of the crosslink density of the polyurethanes. Instead, it was found that the microstructural characteristics of the spherulitic interphase, a mixture of crystallites and amorphous material formed on the Al surface, strongly affects water-vapor absorption: As the area fraction and the size of spherulites for the films increases, the amount of absorbed water vapor initially increases rapidly and then remained constant. The water vapor absorbed and condensed at spherulite boundaries consisting of voids and defects was created due to volume contraction during polymer crystallization. (C) 2003 Wiley Periodicals, Inc. [References: 9]
机译：研究了聚氨酯/ Al键的水蒸气吸收，并测量了水蒸气暴露后样品的重量增加，以检验在Al表面形成的聚氨酯结晶界面对水蒸气吸收的影响。发现水蒸气吸收与聚氨酯的交联密度无关。取而代之的是，发现球状相的微观结构特征（在铝表面上形成的微晶和无定形材料的混合物）强烈影响水蒸气的吸收：随着膜的球状体的面积分数和尺寸的增加，其数量吸收的水蒸气的百分比最初迅速增加，然后保持恒定。由于聚合物结晶过程中的体积收缩，产生了在由空隙和缺陷组成的球晶边界处吸收和冷凝的水蒸气。 （C）2003 Wiley Periodicals，Inc. [参考：9]

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