<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/22b1883a-78a8-4165-b46a-dcfb7098e36f/9D2AE863-6653-4B42-B5B5-DF1603001612/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://sciencenow.sciencemag.org/cgi/content/full/2009/506/2?rss=1" href="http://sciencenow.sciencemag.org/cgi/content/full/2009/506/2?rss=1" style="font-size: 11px;">sciencenow.sciencemag.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2009/506/2?rss=1"><H2>Plastics That Change Color When Stressed</H2></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2009/506/2?rss=1"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/sciencenow.sciencemag.org/img/A84152EC-7695-4C66-B7CF-B28FA3DB7BC2" alt="Picture of plastics" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2009/506/2?rss=1">Researchers have created solid plastics that change color under mechanical stress. Down the road, the approach could lead to plastics that signal when they are about to break or trigger a chemical reaction designed to toughen them where they are under the most stress.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2009/506/2?rss=1"><P> This isn't the first "smart" material that senses and responds to its environment. For example, scientists have created self-healing plastics containing tiny capsules that rupture if a crack develops, releasing a catalyst to reform the plastic. But researchers would also like to be able to design self-repair into individual polymer molecules that make up the plastic.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2009/506/2?rss=1">It should also be possible, using the same strategy, to design a wide variety of other mechanophores that perform different functions, such as triggering a self-healing chemical reaction, and embed them into polymer molecules.</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/9D2AE863-6653-4B42-B5B5-DF1603001612/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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