Nylon 6,6 at a glance

Uses: fibers, thermoplastics
Monomers: adipic acid and hexamethylene diamine
Polymerization: acid catalyzed condensation polymerization
Morphology: highly crystalline
Melting temperature: 280oC
Glass transition temperature: 50oC

Copyright ©2005      Polymer Science Learning Center      Department of Polymer Science      The University of Southern Mississippi

ENTER> A typical upright soundboard The spruce soundboard in the back
of an upright is what generates
the sound you hear. Though the strings do all the vibrating that initiates the sound, the sound that you really hear from a piano comes from the soundboard - in the back of an upright or the underside of a grand. It is made of spruce wood - more cellulose - and composed of a set of boards about 3/8" thick. They are held together by a set of "ribs" on the back. The strings are connected to the spruce via a set of hardwood bridges that conduct the vibrations of the strings into the wood and cause the entire soundboard to vibrate. Without it, a piano would sound like... well not much at all. Pure tone from a vibrating string isn't really very loud