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首页> 外文期刊>RSC Advances >Plasticizing and crosslinking effects of borate additives on the structure and properties of poly(vinyl acetate)
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Plasticizing and crosslinking effects of borate additives on the structure and properties of poly(vinyl acetate)

机译：硼酸盐添加剂的增塑和交联作用对聚醋酸乙烯酯的结构和性能的影响

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As an environmentally friendly, low-cost and widely used polymer, poly(vinyl acetate) (PVAc) is worth modifying to achieve better properties. Here, we report on the influence of borate additives on the structure and properties of partially hydrolysed PVAc. In addition to the general crosslinking function of borate additives, an extraordinary plasticizing effect was found. By controlling the pH from 4 to 11 during sample preparation, the plasticizing and crosslinking effects can be shifted. In alkaline conditions, the degree of crosslinking in the PVAc/borate sample is increased; however, this increase declines gradually with an increase in the borate additive content, which impacts the morphology of the PVAc latex particles, as well as the mechanical and thermal properties of the PVAc/borate films. In contrast, in acidic conditions, the PVAc/borate films are plasticized by borate additives; thus, their ultimate mechanical strength, elastic moduli and thermal stabilities decrease, while the water diffusivities increase.
机译：作为一种环保，低成本和广泛使用的聚合物，聚乙酸乙烯酯（PVAc）值得进行改性以获得更好的性能。在这里，我们报告硼酸盐添加剂对部分水解的PVAc的结构和性能的影响。除了硼酸酯添加剂的一般交联功能外，还发现了非凡的增塑效果。通过在样品制备过程中将pH值控制在4至11，可以改变增塑和交联效果。在碱性条件下，PVAc /硼酸酯样品中的交联度增加;但是，随着硼酸盐添加剂含量的增加，这种增加逐渐减少，这影响了PVAc胶乳颗粒的形态以及PVAc /硼酸盐薄膜的机械和热性能。相比之下，在酸性条件下，PVAc /硼酸盐薄膜是通过硼酸盐添加剂增塑的。因此，它们的极限机械强度，弹性模量和热稳定性降低，而水扩散率增加。

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