接枝聚合法对聚乙烯纤维进行表面改性,Journal of Polymer Science Part A: Polymer Chemistry

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接枝聚合法对聚乙烯纤维进行表面改性
Journal of Polymer Science Part A: Polymer Chemistry Pub Date : 15 July 1994 , DOI: 10.1002/pola.1994.080320910
Masaru Mori , Yoshikimi Uyama , Yoshito Ikada

为了提高润湿性和附着力，将丙烯酰胺（AAm）和甲基丙烯酸缩水甘油酯（GMA）接枝聚合到了用Ar等离子体预处理的超高模量聚乙烯（UHMPE）纤维的表面上。在进行等离子体处理并随后暴露于空气中以将过氧化物引入到纤维表面之后，可以在高温下（脱气方法）在脱气的单体溶液中或在充气的单体中，从聚合物过氧化物进行接枝聚合到UHMPE纤维上紫外线照射下，在30°C下含有核黄素的溶液（光诱导法）。分别由水和二恶烷分别制得AAm和GMA的单体溶液。严格除去均聚物后，使用ATR-FTIR和XPS对接枝纤维进行表面分析，这表明PAAm和PGMA链接枝在纤维的表面区域。当在相同浓度的AAm溶液中进行比较时，通过光诱导方法的PAAm的接枝率比通过脱气方法的PAAm的接枝率高得多。紫外线照射时间极大地影响了PGMA的接枝量，但如果处理时间超过30 s，则对血浆处理时间的影响不大。丙胺与PGMA接枝表面的反应导致XPS光谱中出现氮峰，表明PGMA接枝纤维表面存在环氧基。分级为4 +©1994 John Wiley＆Sons，Inc. 当在相同浓度的AAm溶液中进行比较时，通过光诱导方法得到的PAAm的接枝率要比通过脱气方法得到的PAAm的接枝率高得多。紫外线照射时间极大地影响了PGMA的接枝量，但如果处理时间超过30 s，则对血浆处理时间的影响不大。丙胺与PGMA接枝表面的反应导致XPS光谱中出现氮峰，表明PGMA接枝纤维表面存在环氧基。分级为4 +©1994 John Wiley＆Sons，Inc. 当在相同浓度的AAm溶液中进行比较时，通过光诱导方法的PAAm的接枝率比通过脱气方法的PAAm的接枝率高得多。紫外线照射时间极大地影响了PGMA的接枝量，但如果处理时间超过30 s，则对血浆处理时间的影响不大。丙胺与PGMA接枝表面的反应导致XPS光谱中出现氮峰，表明PGMA接枝纤维表面存在环氧基。分级为4 +©1994 John Wiley＆Sons，Inc. 丙胺与PGMA接枝表面的反应导致XPS光谱中出现氮峰，表明PGMA接枝纤维表面存在环氧基。分级为4 +©1994 John Wiley＆Sons，Inc. 丙胺与PGMA接枝表面的反应导致XPS光谱中出现氮峰，表明PGMA接枝纤维表面存在环氧基。分级为4 +©1994 John Wiley＆Sons，Inc.

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Surface modification of polyethylene fiber by graft polymerization

To improve the wettability and adhesion, graft polymerization of acrylamide (AAm) and glycidyl methacrylate (GMA) was performed onto the surface of ultra-high modulus polyethylene (UHMPE) fiber pretreated with Ar plasma. Following the plasma treatment and the subsequent exposure to air to introduce peroxides onto the fiber surface, graft polymerization onto the UHMPE fiber was allowed to proceed from the polymer peroxides either in deaerated monomer solution at an elevated temperature (degassing method), or in aerated monomer solution containing riboflavin at 30°C under UV irradiation (photoinduction method). The monomer solution was prepared from water and dioxane for AAm and GMA, respectively. After rigorous removal of homopolymers, surface analysis of the grafted fibers was performed with ATR-FTIR and XPS, which revealed that PAAm and PGMA chains were grafted in the surface region of fibers. The grafting rate of PAAm by the photoinduction method was much higher than that by the degassing method when compared at the same concentration of the AAm solution. The amount of PGMA grafted was greatly affected by UV irradiation time, but depended on plasma treatment time to an insignificant extent if the treatment was carried out for longer than 30 s. Reaction of propylamine with the PGMA-grafted surface resulted in the appearance of a nitrogen peak in the XPS spectrum, suggesting the presence of epoxy groups on the surface of PGMA grafted fiber. © 1994 John Wiley & Sons, Inc.

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