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首页> 外文期刊>Polymers for advanced technologies >Glass bead grafting with poly(carboxylic acid) polymers and maleic anhydride copolymers
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Glass bead grafting with poly(carboxylic acid) polymers and maleic anhydride copolymers

机译：用聚（羧酸）聚合物和马来酸酐共聚物接枝玻璃珠

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Glass beads were etched with acids and bases to increase the surface porosity and the number of silanol groups that could be used for grafting materials to the surfaces. The pretreated glass beads were functionalized using 3-aminopropyltriethoxysilane (APS) coupling agent and then further chemically modified by reacting the carboxyl groups of carboxylic acid polymers with the amino groups of the pregrafted APS. Several carboxylic acid polymers and poly(maleic anhydride) copolymers, such as poly(acrylic acid) (PAA), poly(methacrylic acid) (PMA), poly(styrene-alt-maleic anhydride) (PSMA), and poly(ethylene-alt-maleic anhydride) (PEMA) were grafted onto the bead surface. The chemical modifications were investigated and characterized by FT-IR spectroscopy, particle size analysis, and tensiometry for contact angle and porosity changes. The amount of APS and the different polymer grafted on the surface was determined from thermal gravimetric analysis and elemental analysis data. Spectroscopic studies and elemental analysis data showed that carboxylic acid polymers and maleic anhydride copolymers were chemically attached to the glass bead surface. The improved surface properties of surface modified glass beads were determined by measuring water and hexane penetration rates and contact angle. Contact angles increased and porosity decreased as the molecular weights of the polymer increased. The contact angles increased with the hydrophobicity of the attached polymer. The surface morphology was examined by scanning electron microscopy (SEM) and showed an increase in roughness for etched glass beads.
机译：用酸和碱蚀刻玻璃珠，以增加表面孔隙率和可用于将材料接枝到表面的硅烷醇基团的数量。使用3-氨基丙基三乙氧基硅烷（APS）偶联剂对预处理的玻璃珠进行功能化，然后通过使羧酸聚合物的羧基与预接枝的APS的氨基反应进行进一步的化学修饰。几种羧酸聚合物和聚（马来酸酐）共聚物，例如聚（丙烯酸）（PAA），聚（甲基丙烯酸）（PMA），聚（苯乙烯-alt-马来酸酐）（PSMA）和聚（乙烯-将马来酸酐（PEMA）（PEMA）接枝到珠子表面。通过FT-IR光谱，粒度分析和用于接触角和孔隙率变化的张力测定法对化学修饰进行了研究和表征。从热重分析和元素分析数据确定表面上接枝的APS和不同聚合物的量。光谱研究和元素分析数据表明，羧酸聚合物和马来酸酐共聚物化学附着在玻璃珠表面。通过测量水和己烷的渗透速率和接触角，可以确定表面改性玻璃珠的改进表面性能。随着聚合物分子量的增加，接触角增加，孔隙率降低。接触角随着所连接的聚合物的疏水性而增加。通过扫描电子显微镜（SEM）检查了表面形态，并且显示出蚀刻的玻璃珠的粗糙度增加。

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