The 60Co γ radiation effect on spherical open-porous polymethylphenylvinyl siloxane foam was studied in different atmospheres at room temperature. The physical and chemical behaviors of unirradiated and irradiated ma...The 60Co γ radiation effect on spherical open-porous polymethylphenylvinyl siloxane foam was studied in different atmospheres at room temperature. The physical and chemical behaviors of unirradiated and irradiated materials were studied by SEM, FTIR, TG (thermal gravity analysis), GC/MS(gas chromatography and mass spec -troscopy), etc. The present results indicate that the yields of gas products increase linearly with the dose increasing. Furthermore, some changes in material’s microscopic form, composition, structure and mechanical property were observed, but the maxi -mum thermal decomposition temperature of the sample alters little and the dose gives no effect on it.展开更多
Studied influence of γ-irradiation on stucturation in butadiene nitrile rubber solution and films properties studied also. Structuration in solutions has defined by rheological method with rotation viscometer. Shown ...Studied influence of γ-irradiation on stucturation in butadiene nitrile rubber solution and films properties studied also. Structuration in solutions has defined by rheological method with rotation viscometer. Shown influence of solvent nature (methyl ethyl ketene: toluene) to strength properties and structures of films obtained from this solvents. It has been found that during irradiation of solvent, films and butadiene nitrile rubber solution characteristic viscosity η increased, increasing of Huggins constant (К') observed as well. Changing of spatial mesh of polymers occurs at the cost of changed size of macromolecule balls. Shown, that in the issue of crossing the properties including thermo dynamical features of films and butadiene nitrile rubber solution has changed.展开更多
以壳聚糖(CTS)和聚乙二醇(PEG)为原料,以甲醛为交联剂,在微波辐射条件下通过交联反应制备了一系列CTS/PEG共混膜。研究表明,在反应时间为1.0 m in,交联剂用量为0.6%,微波辐射功率为600 W,PEG用量为20%条件下制得的共混膜的综合性能较佳...以壳聚糖(CTS)和聚乙二醇(PEG)为原料,以甲醛为交联剂,在微波辐射条件下通过交联反应制备了一系列CTS/PEG共混膜。研究表明,在反应时间为1.0 m in,交联剂用量为0.6%,微波辐射功率为600 W,PEG用量为20%条件下制得的共混膜的综合性能较佳,其拉伸弹性模量为1 389.6 MPa,吸水值为3.53 g/(g.cm2.h),透光率为78%。展开更多
基金Supported by the China Academy of Engineering Physics (CAEP Project No. 1999Z0503)
文摘The 60Co γ radiation effect on spherical open-porous polymethylphenylvinyl siloxane foam was studied in different atmospheres at room temperature. The physical and chemical behaviors of unirradiated and irradiated materials were studied by SEM, FTIR, TG (thermal gravity analysis), GC/MS(gas chromatography and mass spec -troscopy), etc. The present results indicate that the yields of gas products increase linearly with the dose increasing. Furthermore, some changes in material’s microscopic form, composition, structure and mechanical property were observed, but the maxi -mum thermal decomposition temperature of the sample alters little and the dose gives no effect on it.
文摘Studied influence of γ-irradiation on stucturation in butadiene nitrile rubber solution and films properties studied also. Structuration in solutions has defined by rheological method with rotation viscometer. Shown influence of solvent nature (methyl ethyl ketene: toluene) to strength properties and structures of films obtained from this solvents. It has been found that during irradiation of solvent, films and butadiene nitrile rubber solution characteristic viscosity η increased, increasing of Huggins constant (К') observed as well. Changing of spatial mesh of polymers occurs at the cost of changed size of macromolecule balls. Shown, that in the issue of crossing the properties including thermo dynamical features of films and butadiene nitrile rubber solution has changed.
