Nucleation ability of nonmetallic organophosphate derivatives in isotactic polypropylene

作者：Long, Lijuan; He, Wentao; Li, Juan; Qin, Shuhao; Yu, Jie^*

来源：Journal of Thermal Analysis and Calorimetry, 2017, 127(3): 2283-2291.

DOI：10.1007/s10973-016-5790-2

• Nucleation
• Crystallization
• Optical properties
• Isotactic polypropylene
• Nonmetallic organophosphate derivatives

Nonmetallic organophosphate derivatives of ammonium (An), triethylammonium (CAn), and quaternary phosphonium (SP) salts of 2,2'-methylene-bis-(4,6-di-tert-butylphenyl) phosphate were synthesized and characterized. Their nucleation effects on isotactic poly(propylene) (iPP) were investigated in detail. The melting temperature of An, CAn, and SP was 262, 208, and 271 A degrees C, respectively, which was near to the processing temperature of iPP (220 A degrees C). Their particle morphologies revealed a great difference. An with a glossy rod-like structure can be uniformly dispersed in iPP matrix, while the bulk-like and layer structures of CAn and SP cannot play the same role. Moreover, with the incorporation of these derivatives at the same mass (0.15 mass%), iPP/An possesses an increased crystallization peak temperature of 15 A degrees C and significant enhanced optical property as compared to neat iPP, but iPP/CAn and iPP/SP do not showed an overall enhanced property. Furthermore, nucleation effects of the compound nucleating agent consisting of these derivatives and sodium laurate (SNa) (a conventional compounded composition) on iPP were examined to clarify the role of particle morphology on the dispersibility in iPP. The results demonstrated that SP-SNa presented the most uniform dispersion in iPP, and the haze value of iPP/SP-SNa (concentration of 0.15 mass% of SP-SNa) was decreased to 11.8 %, showing the best synergistic effect of layer shape of SP with SNa.

• 出版日期2017-3