关键词: 硅橡胶, 喷霜, 红外光谱, 高效液相色谱, 飞行时间质谱, 粒度

Abstract: The silicone rubber products blooming has been characterized by using Fourier transform infrared spectroscopy (FT-IR), high performance liquid chromatography (HPLC) as well as time of flight-mass spectrometer (TOF-MS). The blooming is found to be tripolymer and tetrapolymer of diphenyl silandiol, a kind of structural control agent in the rubber. There is more tripolymer than tetrapolymer in the bloom. The bloom is the same as the impuries in GRC but the impuries in GRC are not the main source resulted in the blooming. It may be resulted from the difference of granularity of GRC materials according to the results of scanning electron microscope (SEM) and laser diffraction particle analyzer. The bigger GRC grains are more inlcined to dehydrate and self-polymerize, then resulting in blooming.

Key words: silicone ruber, blooming, FT-IR, HPLC, TOF-MS, granularity