Thermally stable NLO poly(amide–imide)s via sequential self-repetitive reaction

The facile synthesis and optical nonlinearity of hyperbranched polyaspartimides with azobenzene dyes

“…C 41 Compound 2 (2.35 g, 3 mmol) was first dissolved in 20 cm 3 DMAc in a 100 cm 3 flask. After the mixture was completely dissolved, maleic anhydride (1.08 g, 1.1 mmol) was added.…”

“…Poling processes for the polymer films were carried out using an in situ contact poling technique [41]. The poling voltage was maintained at 100 V and the temperature was kept at approximately 10 C lower than the T g of the sample for a certain period of time.…”

New Poly(Amide-Imide)s Based on 1,3-Bis[4,4′-(Trimellitimido) Phenoxy] Propane and Hydantoin Derivatives: Synthesis and Properties

“…The T g of the PAIs 8a and 8f is 210 and 230 • C, respectively (Table 3). PAI 8f has higher T g value than PAI 8a T 5 , T 10 and T g were recorded by TGA at a heating rate of 10 • C/min in N 2 . The char yield is the percentage mass of material left undecomposed after TGA analysis at 600 • C.…”

“…Also the properties of PAIs can be readily modified by the incorporation of different segments, such as flexible linkages (-O-, -SO 2 -, -(CH 2 ) n -, C(CF 3 ) 2 -), bulky pendent groups (such as t-butyl, adamantyl and naphtyl), large pendent groups or polar constituents such as heterocyclic segments, into the polymer backbone due to the altering crystallinity and intermolecular interactions. If the flexible segments are carefully chosen, it is possible to promote solubility without affecting thermal and mechanical properties to any great extent [8][9][10][11]. In our previous papers we described the synthesis of different polyamides, PAIs, polyesters and poly(ester-imide)s containing heterocyclic moieties in the main chain, such as hydantoin derivatives, and a pyridyl moiety with improved solubility and thermal properties [12][13][14].…”

Nonlinear optical, poly(amide-imide)–clay nanocomposites comprising an azobenzene moiety synthesised via sequential self-repetitive reaction

“…To enhance the stability, one approach is to introduce the inorganic component into the organic NLO materials, yielding organic/inorganic hybrid materials via a sol-gel process [16][17][18]. In our recent investigation [19], NLOactive poly(amide-imide)s obtained via sequential self-repetitive reaction (SSRR) have been systematically studied. In addition, organic/inorganic NLO-active nanocomposites were prepared by performing SSRR of poly(N-acylurea) and sol-gel process of phenyltriethoxysilane, concurrently [20].…”