In order to enhance the properties of poly(1,4-cyclohexylene dimethylene terephthalate) (PCTG), organic muscovite (O-Mus) which was prepared by intercalating benzyl triphenyl phosphorus chloride (BTPPC) into muscovite (Mus) was used as a functional filler for PCTG , and a series of PCTG/O-Mus composites were prepared. The properties of the PCTG composites were analyzed by FTIR, XRD, SEM and DMA. The results showed that BTPPC could successfully intercalated into Mus layers. When the addition amount of O-Mus was 2%, 4%, and 6%, the O-Mus was mainly in a delaminated state and well dispersed in PCTG.The dimensional stability, hot deformation temperature (HDT), vicat softening temperature (VST), thermal decomposition temperature and flexural modulus of PCTG/O-Mus increased with increasing the content of O-Mus. The post-moulding shrinkage of PMD and NMD of PCTG/O-Mus-6 were 0.63% and 0.49%, respectively, which were 38.2% and 42.4% lower than those of PCTG. The HDT, VST, initial decomposition temperature (T_5%) and the temperature at the maximum mass loss rate (T_max) of PCTG/O-Mus-6 were 94 ℃, 103 ℃, 423.8 °C, and 460.1 °C, respectively, which were 12 ℃, 12 ℃, 22.6 °C, and 37.8 °C greater than those of PCTG. The flexural and tensile strengths of PCTG/O-Mus increased at first, and then decreased. Adding O-Mus could increase the glass transition temperature of PCTG, and with the increase of O-Mus addition, the glass transition temperature of PCTG/O-Mus is higher.

Keywords: poly(1,4-cyclohexylene dimethylene terephthalate), organic muscovite, benzyl triphenyl phosphorus chloride, post-moulding shrinkage, mechanical properties