Comparative Studies on Thermal, Mechanical, and Flame Retardant Properties of PBT Nanocomposites via Different Oxidation State Phosphorus-Containing Agents Modified Amino-CNTs oleh San-E Zhu, Li-Li Wang, Hao Chen, Wei Yang, Anthony Chun-Yin Yuen, Timothy Bo-Yuan Chen, Cheng Luo, Wen-Mei Bi, En-Zhu Hu, Jian Zhang, Jing-Yu Si, Hong-Dian Lu, Kun-Hong Hu, Qing Nian Chan, Guan Heng Yeoh