對排聚苯乙烯(syndiotactic polystyrene，sPS)，具有結晶速率快、高熔點(耐高溫) 以及機械性質佳等性質，是相當受到重視的一種工程塑膠。奈米碳球(carbon nanocapsules，CNC)是一種由碳組成的多面體型材料，每個碳原子均為sp2結構，這樣的結構使得奈米碳球具有導電性好、熱傳性佳、高強度、化學穩定性等特點。故本研究將此二材料進行混摻，針對其結晶行為與微結構進行研究。

DSC結果顯示，CNC的摻入會使得sPS冷結晶峰溫度變低、熔融結晶峰溫度升高，幫助sPS更容易結晶，但亦會使得其結晶量下降。CNC含量愈多，sPS的結晶活化能有增加趨勢。CNC也會降低sPS的n值，由原本的2.5~3下降到1.8~2.2，並提昇k值，使sPS整體晶體成長速率變快。

TEM結果顯示，CNC粒子大小約為數十奈米。而CNC含量的增加不會影響CNC聚集體之大小，約為數百奈米，僅會影響CNC聚集體間的間距。CNC會使sPS lamellae排列變得較雜亂無次序，平行度降低，但不會影響lamellae厚度。

Syndiotactic polystyrene (sPS) possesses some properties, including high crystallization rate,
high melting temperature and good mechanical strength.
It is a noticeable engineering plastic. Carbon nanocapsule (CNC) is a polyhedral material which is composed of carbon. Each carbon atom has sp2 structure, making CNC as a material with good electric and heat conductivity, high strength and chemical durability. In this research, we blend sPS and CNC together to prepare sPS/CNC composites and focus on their crystallization behavior and microstructure developed.

DSC results show that the addition of CNC decreases the cold crystallization temperature of sPS and increases the melt crystallization temperature. The more the content of CNC, the higher the crystallization activation energy is. Addition of CNC declines the Avrami exponent from a value of 2.5~3 to 1.8~2.2, but increases the overall crystallization rate of sPS.

TEM results show that the size of CNC particle is about 50~100nm. The advancement of CNC doesn’t affect the size of CNC aggregates which is about 300~500nm, but influence the distance between CNC aggregates. Besides, the addition of CNC makes the arrangement of sPS lamellae more disordered and less parallel to one another. The lamellar thickness is not influenced by the CNC addition.

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