图1。PDMS-“随机分裂”机制的热降解a）分子内重新分布和b）分子间重新分布.......................................................................................................................................................................................................................................................................................................................................................................................................................................（a）新鲜制备的商用硅胶密封剂样品（b）提取的硅氧烷降解产物的离子电流热量计学的EGA-MS总离子电流热图。................................... 23 Figure 3.EGA-MS热合器用于控制和老化商用硅胶密封剂样品。 (a) Level 3 aging samples, (b) Level 2 aging samples, (c) Level 1 aging samples & (d) Control sample .................... 25 Figure 4. 比较加热速率不同的对照密封剂的TD-PYR-GC-MS曲线用于对照密封剂（从90°C到790°C）获得的对照密封剂（五个步骤）。 比较了两个加热速率：（a）600°C/min和（b）20°C/min。 ............................................................................................ 27 Figure 5. 对于两个新鲜制备的样品，获得了 GC-MS色谱图，并使用优化方法进行了比较。 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 28图6。 Siloxane Degradation Product Identification ............................................................................... 29 Figure 7. EGA-MS热合图和GC-MS色谱图，用于L3的代表性样品。 ............................................................................................................................................................. EGA-MS热合图和GC-MS色谱图，用于L2的代表性样品。 .... 33图11。EGA-MS热合器用于控制和老化商用硅胶密封剂样品。(a) Level 3 aging samples, (b) Level 2 aging samples, (c) Level 1 aging samples & (d) Control sample .................... 25 Figure 4.比较加热速率不同的对照密封剂的TD-PYR-GC-MS曲线用于对照密封剂（从90°C到790°C）获得的对照密封剂（五个步骤）。比较了两个加热速率：（a）600°C/min和（b）20°C/min。............................................................................................ 27 Figure 5.GC-MS色谱图，并使用优化方法进行了比较。........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 28图6。Siloxane Degradation Product Identification ............................................................................... 29 Figure 7.EGA-MS热合图和GC-MS色谱图，用于L3的代表性样品。 ............................................................................................................................................................. EGA-MS热合图和GC-MS色谱图，用于L2的代表性样品。 .... 33图11。EGA-MS热合图和GC-MS色谱图，用于L3的代表性样品。.............................................................................................................................................................EGA-MS热合图和GC-MS色谱图，用于L2的代表性样品。.... 33图11。.............................................................................................................EGA-MS热合图和GC-MS色谱图，用于L1的代表性样品。 ........................................................................................................................................................................................................................................................................................................................ EGA-MS和L0代表性样品的相应GC-MS色谱图。 不同降解水平L3，L2，L1 vs Control L0的代表性样品的定量数据。 在EGA-MS热合图和GC-MS色谱图，用于L1的代表性样品。........................................................................................................................................................................................................................................................................................................................EGA-MS和L0代表性样品的相应GC-MS色谱图。不同降解水平L3，L2，L1 vs Control L0的代表性样品的定量数据。在