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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and characterization of LDPE/PVA blend films filled with glycerin-plasticized polyvinyl alcohol
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Preparation and characterization of LDPE/PVA blend films filled with glycerin-plasticized polyvinyl alcohol

机译：甘油增塑聚乙烯醇填充的LDPE / PVA共混膜的制备与表征

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摘要

A series of LDPE/PVA blend films were prepared via a twin-screw extruder, and their morphology, thermal property, oxygen and water vapor permeation, surface properties, and mechanical properties were investigated as a function of the PVA content. During the extrusion process of the blend films, glycerin improved the compatibility and processing conditions between LDPE and PVA. The melting temperature (T-m), melting enthalpy (H-m), crystallinity (%), and thermal stability of the thermal decomposition temperature (T-5%) of the LDPE/PVA blend films decreased with increasing PVA content. The oxygen permeabilities of the blend films decreased from 24.0 to 11.4 cm(3)center dot cm (m(2)center dot day center dot atm)(-1) at 23 degrees C. The WVTR increased from 7.8 to 15.0 g(m(2) day)(-1) and the water uptake increased from 0.13 to 9.31%, respectively. The mechanical properties of blend films were slightly enhanced up to 2% PVA and then decreased. The physical properties of the blend films strongly varied with the chemical structure and morphology depending on the PVA and glycerin. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41985.
机译：通过双螺杆挤出机制备了一系列的LDPE / PVA共混膜，并研究了它们的形态，热性能，氧气和水蒸气的渗透性，表面性能和机械性能随PVA含量的变化。在共混膜的挤出过程中，甘油改善了LDPE和PVA之间的相容性和加工条件。 LDPE / PVA共混膜的熔融温度（T-m），熔融焓（H-m），结晶度（％）和热分解温度（T-5％）随PVA含量的增加而降低。共混膜的透氧性在23°C下从24.0降低到11.4 cm（3）中心点cm（m（2）中心点日中心点atm）（-1）。WVTR从7.8增加到15.0 g（m） （2）天）（-1），并且吸水率分别从0.13％增加到9.31％。混合膜的机械性能在PVA最高达到2％时略有提高，然后下降。取决于PVA和甘油，共混物膜的物理性质随化学结构和形态变化很大。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41985。

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