摘要
分散聚合可以得到微米級單一分佈的圓球形高分子顆粒，其粒徑大小、分佈範圍狹窄的特性及單一步驟的製程方法，都恰好符合現今新興應用材料的需求，因此分散聚合是極具發展潛力的重要聚合方法。本實驗第一部份是研究以溶劑揮發法獲得分散較佳的粉狀高分子包覆顏料之顆粒。第二部份是以顏色觀察、SEM和plasma etching方式觀察包覆前後顏料表貌的不同。結果發現只有小粒徑的顏料才能被高分子包覆至圓形，且顏料粒徑夠小時，一個高分子顆粒可包覆一顆以上的顏料。第三部份則是在聚合系統中改變顏料含量、穩定劑含量及起始劑含量，觀察顆粒粒徑變化、固相產物產率和下層重量增加的趨勢。結果顯示增加顏料含量，會使下層重量百分比增加；增加穩定劑含量，其固相產物顆粒較小且粒徑趨於均一分佈，而固相產物產率因穩定劑黏度效應遠大於gel effect效應而下降；當起始劑量明顯增加時，高分子包覆顏料顆粒粒徑會增加，同時穩定劑對顆粒的穩定效果也較差。最後，運用了分散劑的球磨技術，以改良高分子對顏料的包覆效果。

※關鍵字：分散聚合、圓球形高分子顆粒、顏料、分散劑、球磨技術

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