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以苯乙烯(St)和丙烯腈(AN)为单体,用大分子单体法和γ射线辐射技术制备了St–AN共聚微球,并用傅里叶红外光谱(FT–IR)、扫描电子显微镜(SEM)、X射线衍射(XRD)和热重分析(TGA)等方法对制得的微球进行了分析表征。结果表明,大分子单体和吸收剂的量都会影响到微球的形态结构、物相结构和热稳定性。在吸收剂量25 kGy条件下用不同大分子单体制得微球的形态结构表现出更明显的差异,在较低吸收剂量(5 kGy)下制得微球的XRD谱图中的肩状衍射峰更明显,较高吸收剂量(25 kGy)下制得的微球具有较好的热稳定性。
St-AN copolymer microspheres were prepared by the macromonomer method and γ-ray irradiation with styrene (St) and acrylonitrile (AN) as monomers. Fourier transform infrared spectroscopy (FT-IR) Microspheres (SEM), X-ray diffraction (XRD) and thermal gravimetric analysis (TGA) were used to characterize the prepared microspheres. The results show that the amount of macromonomer and absorbent affect the morphology, phase structure and thermal stability of the microspheres. The morphological structure of microspheres prepared with different macromonomers at 25 kGy absorbed dose showed a more pronounced difference. Shoulder diffraction peaks in the XRD spectrum of the microspheres prepared at a lower absorbed dose (5 kGy) More obviously, microspheres prepared at higher absorbed doses (25 kGy) have better thermal stability.