引言
1 计算模型和方法
1.1 模型构建
表1 不同PDI的氟化醚聚物周期性模型构建的分子链分布Table 1 Distribution of molecular chains constructed from different PDI unit cells |
| 分子量/(g·mol-1) | PDI | ||||
|---|---|---|---|---|---|
| 1.000 | 1.011 | 1.016 | 1.039 | 1.051 | |
| 4 106.49 | 0 | 0 | 0 | 1 | 2 |
| 6 098.73 | 0 | 3 | 6 | 9 | 8 |
| 8 090.97 | 40 | 28 | 34 | 20 | 18 |
| 10 083.2 | 0 | 3 | 6 | 9 | 8 |
| 12 075.5 | 0 | 0 | 0 | 1 | 2 |
1.2 模型计算
2 氟化醚聚物组分结构和密度的构效关系的模拟结果分析
2.1 氟化醚聚物分子量对密度的影响
图4 正则系综系统中不同分子量的氟化醚聚物体系的动力学模拟过程Fig. 4 Kinetic simulation process of fluorinated ether polymer systems with different molecular weights in regular ensemble systems |
表2 不同分子量氟化醚聚物的温密曲线拟合方程Table 2 Temperature⁃density curve fitting equations for fluorinated ether polymers with different molecular weights |
| 分子量/(g·mol-1) | 温密方程 |
|---|---|
| 4 106 | y=-9.9×10-4 x+2.30 |
| 6 099 | y=-7.9×10-4 x+2.25 |
| 8 091 | y=-6.8×10-4 x+2.25 |
| 10 083 | y=-5.8×10-4 x+2.24 |
| 12 076 | y=-5.1×10-4 x+2.23 |
2.2 氟化醚聚物PDI对密度的影响
图8 不同PDI的氟化醚聚物密度与温度的关系Fig. 8 The relationship between the density of fluorinated ether polymers with different PDI and the temperature |
表3 不同PDI氟化醚聚物的温密曲线拟合方程Table 3 Temperature⁃density curve fitting equations for different PDI fluorinated ether polymers |
| PDI | 温密方程 |
|---|---|
| 1.000 | y=-6.8×10-4 x+2.25 |
| 1.011 | y=-8.0×10-4 x+2.30 |
| 1.016 | y=-9.3×10-4 x+2.34 |
| 1.039 | y=-1.06×10-3 x+2.38 |
| 1.051 | y=-1.36×10-3 x+2.49 |
