Linker engineering of larger POSS-based ultra-low-k dielectrics toward outstanding comprehensive properties

High‐Performance Low‐kPoly(dicyclopentadiene) Nanocomposites as Achieved via Reactive Blending with Norbornene‐Functionalized Larger POSS

“…Interestingly, it is clear that the of T g for PT n N n with same T n N n content is in the order of PT 12 N 12 > PT 10 N 10 > PT 8 N 8 , which means that the value of T g is not only increased from the increase of inorganic components content (T n N n content), but also the increase of POSS size or the regulation of topological structure. [28,32] It should be noted that the values of T g for PT 12 N 12 -5, PT 12 N 12 -10, PT 12 N 12 -20, and PT 12 N 12 -40 are going up to 173.1, 183.9, 193.7, and 202.5 °C, respectively (Figure 4b). Remarkedly, T g has been raised by ≈50 °C from neat PDCPD to PT 12 N 12 -40.…”

“…[5,45] As for PT 10 N 10 and PT 12 N 12 , it is obviously that they possess lower k values than PT 8 N 8 even at same T n N n loadings (Figure 3c), it may be due to the incorporation of larger cavity from larger POSS. [15,28,32,40] Among them, PT 12 N 12 -40 has the minimum k value (2.10 at 10 3 Hz). Compared with the decrease rates of the k values (compared to the k value of PT 8 N 8 -x) for PT n N n materials, we deduce that the contribution of larger POSS to the k values is considerable even only 5 wt% T n N n contained (consists of ≈0.9 wt% POSS cage).…”

“…have been considered as ideal pore generators for reducing the materials' k values. [15,[25][26][27][28][29][30][31][32] Meanwhile, the organic-inorganic hybrid nature and high reactivity of POSSs endow the resulting materials high thermal [28,[32][33][34][35] and mechanical performance, [36,37] large surface area and pore volume, [38][39][40][41] and unique surface properties. [42,43] Recently, we demonstrated that larger POSS (i.e., T 10 and T 12 POSSs) is better nano-building block and filler for fabricating thermally and mechanically robust low-k materials.…”

“…[42,43] Recently, we demonstrated that larger POSS (i.e., T 10 and T 12 POSSs) is better nano-building block and filler for fabricating thermally and mechanically robust low-k materials. [15,28,32] When high-purity octa-, deca-, and dodeca-vinyl POSSs (i.e., T 8 V 8 , T 10 V 10 , and T 12 V 12 ) are introduced into PDCPD matrix, the material's k value is highly related with POSS size and follows the order of T 12 < T 10 < T 8 at the same POSS content, and more importantly, their comprehensive properties do not get worse with increasing the POSS size. As a result, PDCPD with 7 wt% of T 12 V 12 shows the lowest k and best comprehensive properties.…”

Topology-Enabled Simultaneous Enhancement of Mechanical and Healable Properties in Glassy Polymeric Materials Using Larger POSS

“…The enhanced mechanical property can potentially be attributed to the increased functionality (8 for T 8 POSS, 10 for T 10 POSS, and 12 for T 12 POSS, Figure 1a) and different topological structures of larger POSS cages, which is similar to our recent studies on larger POSS-based ultralow dielectric constant materials. 30,36,64,65 Specifically, the T 8 POSS (O h , 6 0 5 0 4 6 , where x, y, and z represent the number of 6-, 5-, and 4-Si atom rings, respectively, following Euler's formula) assumes a cube-like structure, in contrast to the lower-symmetrical cage-like T 10 POSS (D 5h ; 6 0 5 2 4 5 ) and T 12 (D 2d ; 6 0 5 4 4 4 ). The larger POSS cage, facilitated by the looser stacking, exhibits greater molecular mobility.…”