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首页> 外文期刊>Journal of Applied Polymer Science >STUDY ON APPLICATION OF BLOCK COPOLYMERS COMPOSED OF POLY(VINYL ALCOHOL) AND POLYACRYLAMIDE TO PAPER SIZING
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STUDY ON APPLICATION OF BLOCK COPOLYMERS COMPOSED OF POLY(VINYL ALCOHOL) AND POLYACRYLAMIDE TO PAPER SIZING

机译：聚乙烯醇和聚丙烯酰胺嵌段共聚物在造纸中的应用研究

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Block copolymers of poly(vinyl alcohol) (PVA) and polyacrylamide (PAAm) were investigated as paper additives. The mixture of both homopolymers in aqueous solution caused phase separation, which indicated incompatibility. The block copolymers were soluble in water without macrophase separation. In the case of surface sizing to paper, PVA-b-PAAm as well as PAAm afforded stiffness to paper, whereas PVA could not. In the case of internal sizing, the block copolymers with anionically modified PAAm revealed excellent improvement in paper properties, whereas PAAm made the tearing strength worse. Brittle polymers such as PAAm appear to afford stiffness to paper, but also make the paper brittle. PVA that is a tough polymer due to high crystallinity and low glass transition temperature can afford toughness to paper, at the expense of stiffness. The block copolymers seem to retain the desirable properties of each simultaneously. (C) 1995 John Wiley & Sons, Inc. [References: 10]
机译：研究了聚乙烯醇（PVA）和聚丙烯酰胺（PAAm）的嵌段共聚物作为纸张添加剂。两种均聚物在水溶液中的混合物引起相分离，这表明不相容。该嵌段共聚物可溶于水，而没有宏观相分离。在对纸张进行表面施胶的情况下，PVA-b-PAAm和PAAm赋予纸张以挺度，而PVA则不能。在内部施胶的情况下，具有阴离子改性PAAm的嵌段共聚物显示出优异的纸张性能改善，而PAAm则使撕裂强度变差。诸如PAAm之类的脆性聚合物似乎赋予纸张硬度，但也使纸张变脆。由于高结晶度和低玻璃化转变温度而成为坚韧聚合物的PVA可以赋予纸张韧性，但会牺牲挺度。嵌段共聚物似乎同时保留了各自的理想性能。 （C）1995 John Wiley＆Sons，Inc. [参考：10]

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