期刊
BULLETIN OF MATERIALS SCIENCE
卷 32, 期 4, 页码 375-380出版社
INDIAN ACAD SCIENCES
DOI: 10.1007/s12034-009-0054-4
关键词
Bis(4-carboxyphenyl) phenyl phosphine oxide; halogen-free flame retardant copolyamide 66; fabrication; characterization; thermal stability
资金
- Top Science and Technology Innovation Teams of Higher Learning Institutions of Shanxi
- Foundation of North University of China
An intrinsically halogen-free flame retardant polyamide 66 (FR-PA66) was fabricated successfully by two-step polymerization reaction with adipic acid hexamethylene salt (AH salt) and bis(4-carboxyphenyl) phenyl phosphine oxide (BCPPO) as raw materials. The structure, combustion properties and thermal stability were characterized by means of intrinsic viscosity, Fourier transform infrared spectroscopy (FTIR), combustion testing, differential scanning calorimetry (DSC), thermogravimetric analysis (TG) and scanning electron microscope (SEM). Experiments show that BCPPO have excellent copolymerization properties with AH salt. And incorporation of triaryl phosphine oxide (TPO) did not transform the crystal phase structure of PA66. During fabrication of FR-PA66, melt polymerization time exhibits more surprising influence on intrinsic viscosity than aqueous solution polymerization time. The LOI value of FR-PA66 with 9 wt% TPO reaches 27.2, and corresponding UL94 rating reaches V-0. Improved thermo-stability of FR-PA66 can be attributed to both forming of compact char protective layer and further consolidation effect of PIN synergistic system.
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