共查询到20条相似文献,搜索用时 78 毫秒
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本文介绍了水泥的加入对水性腻子性能的影响 ,确定了合理的配方工艺 ,使水泥改性腻子在汽车、机械等行业得到很好的应用 相似文献
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介绍了水性透明木器腻子的配方及制备方法 ,并对颜基比、固化剂的选择、用量以及树脂对腻子层性能的影响进行了讨论。 相似文献
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《化学推进剂与高分子材料》2017,(1):1-7
综述了工业用水性聚氨酯涂料的主要应用领域。主要介绍了水性聚氨酯涂料目前改性研究的现状,如防腐防锈涂料、防水涂料、防火涂料、抗外力涂料、防污涂料、新型智能化涂料等改性研究。最后,根据我国国情,阐述了水性聚氨酯涂料未来的发展方向。 相似文献
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水转印用PVA水解膜的研究 总被引:1,自引:1,他引:0
以聚乙烯醇1788(PVA)作为原料,以甘油(丙三醇)作为增塑剂,采用流延法制作水转印膜,研究水解膜溶解时间、平衡含水率及制膜溶液粘度的影响因素。实验发现,聚乙烯醇薄膜的溶解时间会随着溶解水温、甘油比例的增加而减少,随着膜厚的增加而增加;薄膜的平衡含水率随着环境湿度及甘油比例的增加而增加,且平衡含水率在甘油质量分数小于6%时增加平缓,大于6%时增加比较迅速;在聚乙烯醇水溶液中添加一定的甘油后,随着甘油比例的增加,聚乙烯醇水溶液的粘度会相对减小;在低剪切速率下,质量分数为15%聚乙烯醇水溶液粘度会随着剪切速率的增加而增加。 相似文献
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The bound water fraction (XBW) of a newly‐ developed pH‐sensitive, biodegradable chitosan‐polyvinyl alcohol (PVA) hydrogel crosslinked with glutaraldehyde (GA) was investigated as a function of the chitosan/PVA molar ratio, GA concentration (CGA), and ionization state. Differential scanning calorimetry (DSC) was used to determine the XBW of the initial hydrogel, and of the hydrogel equilibrated in pH 3 and pH 7 buffers. Changes in XBW during swelling and shrinking of hydrogel were also investigated. In the initial state of hydrogel, XBW increased with increasing PVA concentration (CPVA), without being significantly affected by CGA. In the buffer‐equilibrated hydrogels, XBW decreased with increasing CPVA and decreasing CGA. The amount of bound water based on dry mass (CBW) was substantially higher when the hydrogel was in the ionized (swollen) state compared to its unionized counterpart. This may be due to the association of a large quantity of water molecules with ? NH3+ groups of chitosan when the gel swelled in the acidic environment. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 3227–3232, 2006 相似文献
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本文通过对聚乙醇生产过程设备腐蚀状况及工业纯钛的耐腐蚀性能的分析,结合钛材设备在聚乙烯醇生产过程中的实际应用,认为钛材设备的使用可带来可观的经济效益,并分析了实际应用中出现的问题. 相似文献
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Zainab Waheed Abdullah Ian Jeffery Davies Salim Barbhuiya 《Polymer-Plastics Technology and Engineering》2017,56(12):1307-1344
This review exclusively addresses material systems primarily based on poly(vinyl alcohol) (PVA), one of the most popular water-soluble biopolymers, for their use in packaging applications with the primary objective of reducing petrobased plastic waste. In addition, some typical PVA blends and nanocomposites are discussed as comparative studies for material packaging. Structural characteristics, mechanical, thermal, and barrier properties, in addition to biodegradation of these multiple material systems are summarized in a systematic manner. Finally, associated fabrication processing methods together with the most popular theoretical models used for the permeability of PVA nanocomposites are also reviewed in detail. 相似文献
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