{"id":8100,"date":"2017-07-11T17:07:14","date_gmt":"2017-07-11T15:07:14","guid":{"rendered":"https:\/\/www.allresist.de\/?p=6465"},"modified":"2020-08-18T13:10:44","modified_gmt":"2020-08-18T12:10:44","slug":"resist-wiki-new-ar-300-80-and-contact-angle-measurement","status":"publish","type":"post","link":"https:\/\/www.allresist.com\/resist-wiki-new-ar-300-80-and-contact-angle-measurement\/","title":{"rendered":"New AR 300-80 and contact angle measurement"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-b7n7j8-4ac3c40ea95d9fc5ece6930aae9bfdca\">\n.flex_column.av-b7n7j8-4ac3c40ea95d9fc5ece6930aae9bfdca{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-b7n7j8-4ac3c40ea95d9fc5ece6930aae9bfdca av_two_third  avia-builder-el-0  el_before_av_textblock  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><section  class='av_textblock_section av-k7kv7k0n-2ccfd288acb41a339613051d39f23a36 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h1>New AR 300-80 and contact angle measurement<\/h1>\n<\/div><\/section><\/div>\n<section  class='av_textblock_section av-k7kvbko8-11b92417266773ba962135bbc332aaab '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p class=\"p1\">In addition to the established adhesion promoter AR 300-80 (which is based on diphenylsilanediol), also other silicone-containing compounds may be used to render hydrophilic surfaces more hydrophobic. Prerequisite for this to occur is that the silanes used for this purpose possess one or two reactive leaving groups which are able to react with the surface.<\/p>\n<p class=\"p1\">Reactive groups are for example chlorides, alcoholates or hydroxy groups, so that HCl, the free alcohols, or water are formed during the condensation reaction. Reactive groups however show marked differences with respect to their reactivity.<\/p>\n<p class=\"p1\">It is generally recommended to thoroughly clean all substrates before use. Frequently, just intensive rinsing with acetone and DI water is sufficient for this purpose. For more strongly contaminated surfaces, the use of O<sub>2<\/sub>\u00a0plasma, hot basic or acidic piranha solution is required. The subsequent thorough rinse with DI water is mandatory. Any direct contact of acidic piranha solution with acetone must be avoided since explosive acetone peroxides may be formed!<\/p>\n<p class=\"p1\">Chlorosilanes generally react readily even far below room temperature with the substrate, thereby cleaving off HCl. Alcoholates of silanes react considerably more slowly with surfaces at temperatures not below 30 \u00b0C, but higher temperatures accelerate the condensation reaction. In contrast, hydroxy silanes require much higher temperatures, for example about 170 \u2013 180 \u00b0C for AR 300-80. These high SB temperatures are however unfavourable for many substrates. The use of Si alcoholates with soft-bake temperatures in a range of only about 70 \u00b0C \u2013 90 \u00b0C thus provides a very good alternative. And, in contrast to chlorosilanes, no corrosive HCl is released. It also became apparent that the new variant of our adhesion promoter AR 300-80new which is based on these Si alcoholates is equally suitable as adhesion promoter as the previous variant. The comparable good effectiveness of AR 300-80 (new) was evaluated in detail by means of contact angle measurements.<\/p>\n<p class=\"p1\">In the following, we will briefly present a contact angle measurement (according to the sessile droplet method), taking a paraffin surface with different solvents as an example.<\/p>\n<p class=\"p1\">Contact angle measurements fall into two categories, either static or dynamic measurements. If a static contact angle is used, the liquid droplet to be analysed is deposited on a surface of a solid. The droplet diameter should amount to 2 to 6 mm, since the measured contact angle is in this case independent of the diameter of the drop. Dynamic contact angles in contrast describe processes at a liquid-solid interface during wetting and de-wetting processes. In this case, the advancing (enlargement of the droplet volume) and the receding angle (reduction of the droplet volume) are determined and the contact angle hysteresis is evaluated.<\/p>\n<p class=\"p1\">Static contact angles can be determined using the tangent method. The entire profile of the lying drop is here adapted to a general conic section equation. The derivation of this equation at the base line yields the slope at the three-phase boundary and thus the contact angle.<\/p>\n<p><a href=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/youngsche-gleichung.png\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-13800\" src=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/youngsche-gleichung-296x190.png\" alt=\"\" width=\"296\" height=\"190\" srcset=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/youngsche-gleichung-296x190.png 296w, https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/youngsche-gleichung.png 313w\" sizes=\"(max-width: 296px) 100vw, 296px\" \/><\/a><\/p>\n<p class=\"p1\"><span class=\"bildunterschrift\">Young equation (Source: Wikipedia)<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">\u03c3<\/span><sub>L<\/sub>\u00a0= Surface tension of the liquid<\/p>\n<p class=\"p1\"><span class=\"s1\">\u03c3<\/span><sub>S<\/sub>\u00a0= Surface tension of the solid<\/p>\n<p class=\"p1\"><span class=\"s1\">\u03c3<\/span><sub>LS<\/sub>\u00a0= Interfacial energy between liquid and solid<\/p>\n<p class=\"p1\">\u03f4 = Contact angle<\/p>\n<p class=\"p1\">The following figures show video recordings of drops of different solvents on paraffin for the measurement of the static contact angle q. The individual images illustrate how drop shape and thus also the contact angle changes as a function of the surface properties of the solvent. The static contact angle is 109 \u00b0 for water, 88 \u00b0 for ethylene glycol, and becomes substantially smaller (37 \u00b0) for long-chain alcohols. The difference between the contact angle of water and ethylene glycol becomes clearly apparent in the different drop shape and thus a different wetting behavior (difference of about 20 \u00b0).<\/p>\n<p class=\"p1\"><a href=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/wasser-paraffin.png\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-13770\" src=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/wasser-paraffin-284x190.png\" alt=\"\" width=\"284\" height=\"190\" srcset=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/wasser-paraffin-284x190.png 284w, https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/wasser-paraffin-495x333.png 495w, https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/wasser-paraffin.png 497w\" sizes=\"(max-width: 284px) 100vw, 284px\" \/><\/a><\/p>\n<p class=\"p1\"><span class=\"bildunterschrift\">Water on paraffin, q = 109 \u00b0<\/span><\/p>\n<p class=\"p1\"><a href=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/ethylenglycol-paraffin.png\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-11842\" src=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/ethylenglycol-paraffin-272x190.png\" alt=\"\" width=\"272\" height=\"190\" srcset=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/ethylenglycol-paraffin-272x190.png 272w, https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/ethylenglycol-paraffin.png 463w\" sizes=\"(max-width: 272px) 100vw, 272px\" \/><\/a><\/p>\n<p class=\"p1\"><span class=\"bildunterschrift\">Ethylene glycol on paraffin, q = 88 \u00b0<\/span><\/p>\n<p class=\"p1\"><a href=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/octanol-paraffin.png\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-12441\" src=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/octanol-paraffin-314x190.png\" alt=\"\" width=\"314\" height=\"190\" srcset=\"https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/octanol-paraffin-314x190.png 314w, https:\/\/www.allresist.com\/wp-content\/uploads\/sites\/2\/2020\/02\/octanol-paraffin.png 519w\" sizes=\"(max-width: 314px) 100vw, 314px\" \/><\/a><\/p>\n<p class=\"p1\"><span class=\"bildunterschrift\">Octanol on paraffin, q = 37 \u00b0<\/span><\/p>\n<\/div><\/section>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-cgwkxw-a36bcad205fbdda2966037ec5d5d8d67\">\n.avia-section.av-cgwkxw-a36bcad205fbdda2966037ec5d5d8d67{\nbackground-color:#f0faff;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_1'  class='avia-section av-cgwkxw-a36bcad205fbdda2966037ec5d5d8d67 main_color avia-section-default avia-no-shadow  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class=\"iconbox_content\"><header class=\"entry-content-header\"><div class=\"iconbox_icon heading-color\" aria-hidden='true' data-av_icon='\ue831' data-av_iconfont='entypo-fontello'><\/div><h3 class='iconbox_content_title '  itemprop=\"headline\" ><a href='https:\/\/www.allresist.com\/resist-wiki\/' title='Back to the Resist Wiki Overview'  >Back to the Resist Wiki Overview<\/a><\/h3><\/header><div class='iconbox_content_container '  itemprop=\"text\" ><\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><\/div><\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='av_section_2'  class='avia-section av-ofdhg-a4e6a668e5097ecc8285a18682ab7197 main_color avia-section-default avia-no-shadow  avia-builder-el-6  el_after_av_section  avia-builder-el-last  avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-8100'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-6lm22c-7bbb637dbdabde380f79116ade74944b\">\n.flex_column.av-6lm22c-7bbb637dbdabde380f79116ade74944b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-6lm22c-7bbb637dbdabde380f79116ade74944b av_two_third  avia-builder-el-7  el_before_av_one_third  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-48ti38-dd64b402adc21697b1d7e2d789585bb4\">\n.flex_column.av-48ti38-dd64b402adc21697b1d7e2d789585bb4{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-48ti38-dd64b402adc21697b1d7e2d789585bb4 av_one_third  avia-builder-el-8  el_after_av_two_third  avia-builder-el-last  flex_column_div av-zero-column-padding  '     ><p><section  class='av_textblock_section av-k7kvakyq-9b8e392943adaa29411021f28f4e52db '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Overview Process Chemicals- Adhesion Promoter<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2fpyt0-553adfa4e38a469a0e40b9da8e8d9954\">\n#top .hr.hr-invisible.av-2fpyt0-553adfa4e38a469a0e40b9da8e8d9954{\nheight:25px;\n}\n<\/style>\n<div  class='hr av-2fpyt0-553adfa4e38a469a0e40b9da8e8d9954 hr-invisible  avia-builder-el-10  el_after_av_textblock  el_before_av_magazine '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<div  id=\"avia-magazine-1\"  class='av-magazine av-k7kvci1m-3d5f55acb0e6f9a6b8a17a4b4e9cb59d  avia-builder-el-11  el_after_av_hr  avia-builder-el-last   avia-builder-el-11  el_after_av_hr  avia-builder-el-last ' ><div class='av-magazine-group sort_all'><article class='av-magazine-entry av-magazine-entry-id-8100 av-magazine-format-standard av-magazine-type-post av-magazine-entry-1 av-magazine-entry-small av-magazine-no-thumb'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class=\"av-magazine-content-wrap\"><header class=\"entry-content-header\"><time class='av-magazine-time updated'  itemprop=\"datePublished\" datetime=\"2017-07-11T17:07:14+01:00\" >11. July 2017<\/time><h3 class='av-magazine-title entry-title '  itemprop=\"headline\" ><a href='https:\/\/www.allresist.com\/resist-wiki-new-ar-300-80-and-contact-angle-measurement\/' title='Link to: New AR 300-80 and contact angle measurement'>New AR 300-80 and contact angle measurement<\/a><\/h3><\/header><\/div><footer class=\"entry-footer\"><\/footer><\/article><article class='av-magazine-entry av-magazine-entry-id-271 av-magazine-format-standard av-magazine-type-post av-magazine-entry-2 av-magazine-entry-small av-magazine-no-thumb'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class=\"av-magazine-content-wrap\"><header class=\"entry-content-header\"><time class='av-magazine-time updated'  itemprop=\"datePublished\" datetime=\"2013-10-07T08:16:15+01:00\" >7. October 2013<\/time><h3 class='av-magazine-title entry-title '  itemprop=\"headline\" ><a href='https:\/\/www.allresist.com\/resist-wiki-adhesive-strength-of-ar-300-80\/' title='Link to: Adhesive strength of AR 300-80'>Adhesive strength of AR 300-80<\/a><\/h3><\/header><\/div><footer class=\"entry-footer\"><\/footer><\/article><article class='av-magazine-entry av-magazine-entry-id-272 av-magazine-format-standard av-magazine-type-post av-magazine-entry-3 av-magazine-entry-small av-magazine-no-thumb'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class=\"av-magazine-content-wrap\"><header class=\"entry-content-header\"><time class='av-magazine-time updated'  itemprop=\"datePublished\" datetime=\"2013-02-28T14:52:25+01:00\" >28. February 2013<\/time><h3 class='av-magazine-title entry-title '  itemprop=\"headline\" ><a href='https:\/\/www.allresist.com\/resist-wiki-adhesion-promoter-hmds-and-diphenylsilanediol-ar-300-80\/' title='Link to: Adhesion promoter HMDS and diphenylsilanediol (AR 300-80)'>Adhesion promoter HMDS and diphenylsilanediol (AR 300-80)<\/a><\/h3><\/header><\/div><footer class=\"entry-footer\"><\/footer><\/article><\/div><\/div><\/p><\/div>\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In addition to the established adhesion promoter AR 300-80 (which is based on diphenylsilanediol), also other silicone-containing compounds may be used to render hydrophilic surfaces more hydrophobic.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[122],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>New AR 300-80 and contact angle measurement - 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