Thermally cross-linkable

Ease of processing and selective thermal cross-linkable to produce glassy and/or gel-type polymeric framework structures, which may be more suitable for some photonic applications. 

Mulpuri SV, Shin BG, Bognitzki M, Greiner A, Yoon DY. Thermally cross-linkable poly (p-xylylene)s for advanced low-dielectric applications. Macromol Chem Phys 2012 213 (7) 705-12. 

M. Askari, T.-S. Chung, Natural gas purification and olefin/paraffin separation using thermal cross-linkable co-polyimide/ZIF-8 mixed matrix membranes. Journal of Membrane Science 444 (2013) 173-183. 

Kim et al. prepared highly fluorinated poly(arylene ether sulfone) [88] containing an ethynyl end group as thermal cross-linkable groups (Scheme 2.24) via nucleophilic aromatic substitution from 6F-BPA or 4,4 -(trifluoromethylphenylisopropylidene) diphenol (3FBPA) with an excess of pentafluorophenyl sulfone, followed by reaction with 3-ethylnylphenol, studied the effect of reaction temperature and time. 

Scheme 2.24 Structure of fluorinated poly(arylene ether sulfone) containing an ethynyl end group as thermal cross-linkable groups. Taken from Ref [88],...

LIU 08] Liu M.S., Niu Y.-H., Ka J.-W. et al, Thermally cross-linkable hole-trarrsporting materials for improving hole injection in multilayer blue-emitting phosphorescent polymer light-errritting diodes , Macromolecules, vol. 41, no. 24, pp. 9570-9580,2008. 

MA 07] Ma B., Lauterwasser F., Deng L. et al, New thermally cross-linkable polymer and its application as a hole-transporting layer for solution processed multilayer organic hght emitting diodes . Chemistry of Materials, vol. 19, no. 19, pp. 4827 832, 2007. 

Fig. 26.7 Chemical structures of (a) a thermally cross-linkable NLO polymer, BPAZO, and (b) a thermally cross-linkable NLO chromophore, APAN.

Figure 26.7 shows the chemical structures of an NLO chromophore (APAN) and an epoxy-based polymer (BPAZO) where NLO moieties are attached to the backbone [81]. Both the dye and the polymer are functionalized with thermally cross-linkable acryioyl groups. As the dye-doped polymer is subjected to heat as part of the simultaneous poling/curing process, the inter- and intramolecular cross-linking reactions occur simultaneously (Fig. 26.8). The 7g of the cross-linked polymer-dye network is lower than that of the undoped polymer network because of the plasticizing effect of the dissolved dye. However, the temporal stability at 100°C of the polymer-dye network is better than that of the undoped polymer network (Fig. 26.9) as a direct result of the increased cross-linking density in the cross-linked guest-host system. Therefore, the addition of the thermally cross-linkable NLO dye not only increases the...

Some other PFs end capped with cross-linkable groups, such as benzocyclobutene, have been patented by Dow Chemicals [275-277]. For example, the thermal curing of spin-coated polymer 232 gave an insoluble pinhole-free film without alteration of the fluorescent properties (Chart 2.57). 

Yuenetal. 2007 (70) MWCNT Nanotech Port Company, Shenzhen, China Silane-modified MWCNT (Si-MWCNT) Solution mixing CNT Loading levels 0.5 to 3.85 wt% Used a copolymer PMMA-VTES as cross-linkable PMMA to 1 Si-MWCNT 1 Surface and volume electrical resistivity decreased with increasing content of Si-MWCNT Thermal conductivity increased by 87% at 0.99wt% Si-MWCNT loading Thermal stability increased substantially by adding Si-MWCNT due to the presence of Si-O-Si groups SEM and TEM revealed that Si-MWCNT was completely dispersed in the polymer matrix... 

Cross-linkable polyphenols have been enzymatically synthesized. A thermally curable polyphenol... 

Cationic vesicles typically used for DNA delivery often self-aggregate or bind to plasma proteins in vivo. Wu et al. [104] attempted to improve vesicle stability using a cationic lipid with a cross-linkable acrylamide attached to the headgroup (Fig. 16). Vesicles were polymerized using thermal initiation with AAPD. Compared to monomeric vesicles, polymerized vesicles were less cytotoxic, more resistant to aggregation in serum, and comparable in transfection activity using a vector encoding firefly luciferase. 

The Introduction of the styrylketone group into a polymer molecule as lateral substituent has been realized by the condensation of poly(vlnylacetophenone) with benzaldehyde giving poly-(vlnyl-trans-benzalacetophenone). Direct incorporation of the clnnamoyl photosensitive group into a polymeric chain was obtained by polycondensation of specific derivatives. Photo-cross-linkable polymers obtained by polycondensation techniques provide systems with varying thermal and solubility properties. 

By attaching trifluorovinyl groups to the traditional HTMs, a series PFCB-based cross-linkable HTMs were developed (Figure 8.6). It is well-documented that trifluorovinyl aromatic ether can undergo thermal... 

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