Amino silicone resins were synthesized through a three-step method using （3-aminopropyl） triethoxysilane （APTES）, methyltrimethoxysilane （MTMS） and end-capping agents, The products were characterized by Fourier ...Amino silicone resins were synthesized through a three-step method using （3-aminopropyl） triethoxysilane （APTES）, methyltrimethoxysilane （MTMS） and end-capping agents, The products were characterized by Fourier transformed infrared spec- troscopy （FT-IR）, nuclear magnetic resonance （ 1 H NMR）, element analysis and gel permeation chromatography （GPC）. The results of 1 H NMR indicate that the chemical shift signal of acid-catalyzed products is weak at δ3.4 （attributing to alkoxy）. FT-IR shows that there is a vibration peak of Si-OH at 3 100-3 600 cm 1 and the intensity of the peaks is most weak at 6h. The results show that this method cannot only effectively reduce the residue of alkoxy groups and Si-OH groups, but also obtain the products with sufficient amino group. It concludes that this resin is suitable as modifier in the silicone rubber.展开更多
采用平衡合金法制备了Ni-Cr-Re三元系合金试样,并用能谱仪测定了1373和1473 K的平衡相成分。结合前人的试验结果,运用CALPHAD方法,基于相平衡数据和第一性原理计算结果,优化了Ni-Cr-Re三元系1373、1425、1473和1573 K 4个等温截面,建立...采用平衡合金法制备了Ni-Cr-Re三元系合金试样,并用能谱仪测定了1373和1473 K的平衡相成分。结合前人的试验结果,运用CALPHAD方法,基于相平衡数据和第一性原理计算结果,优化了Ni-Cr-Re三元系1373、1425、1473和1573 K 4个等温截面,建立了合理自洽的Ni-Cr-Re三元系热力学数据库。展开更多
基金Supported by the National Natural Science Foundation of China(31170558)
文摘Amino silicone resins were synthesized through a three-step method using （3-aminopropyl） triethoxysilane （APTES）, methyltrimethoxysilane （MTMS） and end-capping agents, The products were characterized by Fourier transformed infrared spec- troscopy （FT-IR）, nuclear magnetic resonance （ 1 H NMR）, element analysis and gel permeation chromatography （GPC）. The results of 1 H NMR indicate that the chemical shift signal of acid-catalyzed products is weak at δ3.4 （attributing to alkoxy）. FT-IR shows that there is a vibration peak of Si-OH at 3 100-3 600 cm 1 and the intensity of the peaks is most weak at 6h. The results show that this method cannot only effectively reduce the residue of alkoxy groups and Si-OH groups, but also obtain the products with sufficient amino group. It concludes that this resin is suitable as modifier in the silicone rubber.
文摘采用平衡合金法制备了Ni-Cr-Re三元系合金试样,并用能谱仪测定了1373和1473 K的平衡相成分。结合前人的试验结果,运用CALPHAD方法,基于相平衡数据和第一性原理计算结果,优化了Ni-Cr-Re三元系1373、1425、1473和1573 K 4个等温截面,建立了合理自洽的Ni-Cr-Re三元系热力学数据库。
