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首页> 外文期刊>Journal of Applied Polymer Science >Poly(vinyl alcohol) nanocomposites with different clays: Pristine clays and organoclays
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Poly(vinyl alcohol) nanocomposites with different clays: Pristine clays and organoclays

机译：具有不同粘土的聚乙烯醇纳米复合材料：原始粘土和有机粘土

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Poly(vinyl alcohol) (PVA)/clay nanocomposites were synthesized using the solution intercalation method. Na ion-exchanged clays [Na+-saponite (SPT) and Na+-montmorillonite (MMT)] and alkyl ammonium ion-exchanged clays (C-12-MMT and C12OOH-MMT) were used for the PVA nanocomposites. From the morphological studies, the Na ion-exchanged clay is more easily dispersed in a PVA matrix than is the alkyl ammonium ion-exchanged clay. Attempts were also made to improve both the thermal stabilities and the tensile properties of PVA/clay nanocomposite films, and it was found that the addition of only a small amount of clay was sufficient for that purpose. Both the ultimate tensile strength and the initial modulus for the nanocomposites increased gradually with clay loading up to 8 wt %. In C12OOH-MMT, the maximum enhancement of the ultimate tensile strength and the initial modulus for the nanocomposites was observed for blends containing 6 wt % organoclay. Na ion-exchanged clays have higher tensile strengths than those of organic alkyl-exchanged clays in PVA nanocomposites films. On the other hand, organic alkyl-exchanged clays have initial moduli that are better than those of Na ion-exchanged clays. Overall, the content of clay particles in the polymer matrix affect both the thermal stability and the tensile properties of the polymer/clay nanocomposites. However, a change in thermal stability with clay was not significant. (C) 2003 Wiley Periodicals, Inc. [References: 25]
机译：采用溶液插层法合成了聚乙烯醇（PVA）/粘土纳米复合材料。 Na离子交换粘土[Na +-皂石（SPT）和Na +-蒙脱土（MMT）]和烷基铵离子交换粘土（C-12-MMT和C1200H-MMT）用于PVA纳米复合材料。根据形态学研究，与烷基铵离子交换粘土相比，Na离子交换粘土更容易分散在PVA基质中。还尝试改善PVA /粘土纳米复合膜的热稳定性和拉伸性能，并且发现仅添加少量粘土就足以实现该目的。纳米复合材料的极限抗拉强度和初始模量都随着粘土含量达到8 wt％而逐渐增加。在C1200H-MMT中，对于包含6重量％有机粘土的共混物，观察到纳米复合材料的极限拉伸强度和初始模量的最大增强。在PVA纳米复合材料薄膜中，Na离子交换的粘土比有机烷基交换的粘土具有更高的拉伸强度。另一方面，有机烷基交换的粘土具有比Na离子交换的粘土更好的初始模量。总体而言，聚合物基质中粘土颗粒的含量会影响聚合物/粘土纳米复合材料的热稳定性和拉伸性能。但是，粘土的热稳定性变化不明显。 （C）2003 Wiley Periodicals，Inc. [参考：25]

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