The method of polymerizing acrylonitrile by gamma ray irradiation was used to obtain polyacrylonitrile(PAN) polymer with high molecular weight.The crystal structures,chemical structure,thermal properties and tensile properties of PAN polymers with different irradiation time were analyzed,and tested by Fourier transform infrared spectrometer,X-ray diffractometer,thermogravimetric analyzer,differential scanning calorimeter and universal testing machine.The results indicated that there was no obvious difference on the chemical structure of three PAN powders of different irradiation time,but there was significant differences on the molecular weight and crystallinity of three PAN powders.The molecular weight of PAN obtained by irradiation for 80 minutes was the largest,which was 27×104.However,the crystallinity of PAN obtained by irradiation for 100 minutes was the highest,which is 39.15%,and the thermal stability was better,and the elongation at break of 25.24% was the highest.When the irradiation time increased,the crystallinity and tensile strength of PAN decreased,but the thermal stability did not change obviously.
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基金资助
国家重点研发计划(2018YFC0810301);江苏省自然科学基金青年基金项目(BK20190925);南通市社会民生科技项目(MS12020050)
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