This polymer’s chain of repeating units are cis-linked—connected on the same side of a carbon-carbon double bond. Once molded into a shape (like a ball), the material returns to that shape whenever it gets deformed (like when it’s hit by a golf club). This provides outstanding resiliency—modern golf balls spring back into shape in just a thousandth of a second.

 

Trans-Polyisoprene
Grandpa called this gutta-percha, a form of hard rubber. A polymer of isoprene (natural rubber), TPI is different from most rubbers in that the isoprene units are trans-linked (connected on opposite sides). That makes it stiffer than normal cis-polyisoprene. .new_magazine_bug { width:196px;float:left; margin:0px 30px 20px 0px; border:none; } .new_magazine_bug img { width:196px; height:auto; } .new_magazine_bug_top { background-color:#eeeeee; padding: 20px 0px 10px 0px; margin-bottom:10px; } ul.magazine_items { list-style-type:none; } ul.magazine_items li { list-style-type:none; line-height:14px; font-family:'calibre-1','calibre-2',Helvetica,Arial,Verdana,sans-serif; font-size:14px; color:#000; font-weight:400; margin:10px; width:176px; } ul.magazine_items a { color:#000; } .new_magazine_bug a img:hover { background-color:inherit; }