摘要 本研究以微乳化聚合的方式，利用陰離子與非離子混合型的界面活性劑，製備出具有核殼結構的Polypyrrole-coated-Polystyrene膠體乳液及導電性奈米顆粒，這種特殊結構可大量減低導電性高分子PPy的用量。 就PS-PPy顆粒的結構形態而言，由微粒徑分析及TEM分析得知其粒徑約50nm左右，製備的核殼顆粒呈均勻的圓球狀，並由FT-IR光譜分析證實了PPy殼將PS內核完全包覆，只是當PPy殼的相對量增加時會對核殼乳液的穩定性造成負面影響。 本文的導電性核殼顆粒並沒有經過摻雜處理，其導電度最高可達1.99 ×10-3S/cm，且發現核殼顆粒的導電度高低與PPy殼的含量、起始劑濃度以及乳液的穩定程度都有關。而由熱重量分析(TGA)得知，具有核殼結構的PS-PPy顆粒對PS與PPy的熱裂解溫度會有些微的變化，而且這種核殼結構對於母體材料的熱穩定性也有一定的幫助。 Abstract Nano-sized core-shell particles were prepared using a mixed surfactant system in a micro-emulsion polymerization process . The surfactant system contains anionic SDS and a nonionic type PEO . The core-shell particles are composed of PPy as shell and PS as core . The geometry of these particles was analyzed by both particle size analysis , TEM and FT-IR , and was found to be perfecty spherical , and sized about 50 nm that PS core was well covered by PPy shell . The core-shell latices become unstable when the amount of PPy increased . The conductivity of these PS-PPy particles is related to PPy shell content , initiator concentration and latex stability . The highest value of conductivity obtained was 1.99 ?10-3S/cm without doping . The thermal decomposing behavior of the core-shell PS-PPy particles was studied by TGA , and they were different from pure PPy and PS particles . The core-shell structure was recognized to improve material heat-stability .
