排序方式: 共有9条查询结果,搜索用时 109 毫秒
1
1.
磷酸酯齐聚物阻燃剂的合成及应用 总被引:5,自引:0,他引:5
以三氯氧磷、间苯二酚、双酚A和苯酚等为原料合成了间苯二酚型磷酸酯齐聚物和双酚A型磷酸酯齐聚物,其结构经红外光谱、高效液相色谱和热重分析表征。研究了催化剂种类和用量对反应的影响以及反应物配比和溶剂对产物性能的影响,结果表明,MgCl2的催化效果最好,最佳用量为1%,三氯氧磷与双酚类化合物的最佳摩尔比为1:4.5-5.0。磷酸酯齐聚物阻燃剂在树脂阻燃方面的应用实验表明,其对聚碳酸酯、聚苯醚、聚苯醚倩抗冲聚苯乙烯和聚对苯二甲酸丁二醇酯的阻燃可达到UL94 V-0级。 相似文献
2.
Important crystal faces that dominate the crystal morphology of royal demolition explosive (RDX) in vacuum were analyzed with the attachment energy (AE) method. Molecular dynamics (MD) simulations were used to calculate the interaction energies between these crystal faces and different solvent molecules for an attachment energy correction. Growth habits in the presence of different solvents were generated. The results showed that some crystal faces in solutions became morphologically more important than that in vacuum while others became less important. Thus, crystal shape and surface property changed a lot with the variation of crystal faces. The results from calculation were in agreement with those from the re-crystallization experiment, which indicated that cyclohexanone (CH) was a promising solvent to modify the crystal morphology of RDX for obtaining products with regular shape and high purity, while butyrolactone (BL) played a great role in improving the surface electrostatic property of RDX. 相似文献
3.
4.
5.
6.
The molecular structure of triacetyltriformylhexaazaisowurtzitane(TATFIW) is optimized by using Gaussian98 software package at the level of B3LYP6-31G.Theoretically analyzed the TATFIW molecular structure,namely bond length,bond angle,dihedral angle and the charge distribution,it was found that hydrogen bond exists in TATFIW,and acetyl is easily taken off than formyl in the nitrolysis with nitric-sulfuric mixed acid.These results mentioned above agree with experiments.The comparison of calculated vibration frequency and intensity with the experiment values are also given. 相似文献
7.
8.
二溴新戊二醇不饱和聚酯树脂及其阻燃玻璃钢性能 总被引:1,自引:0,他引:1
研究了实验室合成二溴新戊二醇不饱和聚酯的方法以及由它制作阻燃玻璃钢.并分别进行了各项性能的测试。二溴新戊二醇不饱和聚酯树脂具有优良的光、热稳定性和阻燃性能,同时由它制得的玻璃钢也能保持优良的力学性能。检测表明该玻璃钢样品具有较好的阻燃性能及其他综合性能。 相似文献
9.
1