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Study on Atmospheric Pressure Plasma Treatment to Improve Sizing Performance of Pure Polyester and Polyester/Cotton Yarns 被引量:1
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作者 崔运花 陆伟 +5 位作者 刁颖 陈艳弘 邓杲阳 吕靖 刘昱 向艳 《Journal of Donghua University(English Edition)》 EI CAS 2011年第4期409-412,共4页
Since polyvinyl alcohol (PVA) as a sizing agent is not environmental friendly, it' s imperative to use less or even without PVA in the warp sizing. A set of sizing formulas with the same solid containing rate and d... Since polyvinyl alcohol (PVA) as a sizing agent is not environmental friendly, it' s imperative to use less or even without PVA in the warp sizing. A set of sizing formulas with the same solid containing rate and different proportion were designed. After sizing practice of pure polyester and polyester/cottan yarns with atmospheric pressure plasma treatment by the set of sizing formulas, sizing quality was compared. The results indicate that strength enhancement rate, elongation reduction rate, and abrasion resistance of pure polyester and polyester/cotton sized yarn are significantly improved by atmospheric pressure plasma treatment. Meanwhile, PVA can be used less, or replaced by acrylic acid size. 展开更多
关键词 plasma continuous treatment polyvinyl alcohol (PVA) sizing quality
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函数性质在数列不等式问题解答中的应用
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作者 耿丽静 《数理化学习(高中版)》 2022年第2期22-23,共2页
函数性质在数列不等式中的应用是高中数学的重点和难点内容.这类题型通常是借助函数的单调性、奇偶性以及周期性,利用不等式的常用变换公式,对数列进行求值或者求证.解答这类题目的主要思想是合理缩放,缩放的主要方法有:二项定理缩放、... 函数性质在数列不等式中的应用是高中数学的重点和难点内容.这类题型通常是借助函数的单调性、奇偶性以及周期性,利用不等式的常用变换公式,对数列进行求值或者求证.解答这类题目的主要思想是合理缩放,缩放的主要方法有:二项定理缩放、函数缩放、切线缩放、对偶缩放、等比缩放等. 展开更多
关键词 函数性质 数列不等式 合理缩放
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