Chitin is thd natural polymer.Because chitin chains occur in bundles or micelles and ectensive intermolacular hydrogen bonding occurs,It results in a very low chemical reactivity.

• 甲壳素是一种天然高分子物质，由于甲壳素分子链是以束状微晶形式存在且分子间有强烈的氢键，使得它的化学反应性很低。