Structure formation in nanophase-separated systems with lamellar morphology: Comb-like vs. linear precision polymers

Tuning layered superstructures in precision polymers

“…3 a inset). Surprisingly, the interplanar spacing of both and forms indicates that the periodicity of this layered structure corresponds approximately to three monomeric repeating units ( for UDAPS16 18 ). Similar behavior with two different superstructures incorporating three monomeric repeating units is found in UDAPS18 (see Fig.…”

“…The packing of the methylene sub-units within the layers depends upon the size and nature of the adjacent functional group as well as on the length of the methylene sequence. For example, bulky ring-like groups lead to liquid-like morphologies at ambient temperatures wherein the methylene sequences remain amorphous 17,18 . Conversely, smaller pendant atoms such as halogens cause minor distortions in the native crystal-like packing of the methylene sequences 12 .…”

Construction of lamellar morphology by side‐chain crystalline comb‐like polymers for gas barrier

“…The normalized enthalpy values of P(S-AA) n -g(p) were significantly smaller than the corresponding alkylamine, suggesting that only a portion of the alkylene segments was involved into crystalline lattice. 29,[41][42][43][44] Moreover, the melting points of P(S-AA) n -g(p) are slightly higher than those of pure alkylamine, which is probably caused by the existence of hydrogen bond generated by the reaction between amines and carboxylic acids. 45 Furthermore, it could be concluded that the higher degree of crystallinity could be achieved when P(S-AA) n -g(p) had the longer side chains or the higher grafting density.…”

“…[24][25][26][27][28] Depending on the interaction and/or the phase separation between the backbone and the side chain, some specific morphology could be exhibited. [29][30][31] Paul prepared semicrystalline poly(n-alkyl (meth)acrylate)s membranes, and it was found that the gas permeability and permeation response is positively affected by the side-chain length. 32,33 Therefore, a series of poly(styrene-co-acrylic acid) is designed as comb-like polymer to obtain a crystalline/amorphous lamellar morphology, and then applied for gas-barrier material.…”

Preparation of antistatic epoxy resin coatings based on double comb-like quaternary ammonium salt polymers

“…The distance on one side increases, while the distance on the other side decreases, showing that side chains have been compressed in this side. Due to the volume and exclusion effect in the compressed side, the molecular chain is not easy to crimp and entangle together, therefore, polymers P(DPA-EPI) and P(DBA-EPI) are easy to form linear morphology because molecular stretch arrangement is always energy wise favorable 28,[39][40][41] and P(DBA-EPI) was further visualized by TEM images as shown in Fig. 1(e) and (f).…”