The self‐assembly morphologies of subunits are largely governed by thermodynamics, which plays a less important role in dimensional control. Particularly for one‐dimensional assemblies from block copolymers (BCPs), the negligible energy difference between short and long ones imposes great challenges in length control. Herein, we report that by incorporating additional polymers to induce in situ nucleation and trigger the subsequent growth, controllable supramolecular polymerization driven by mesogenic ordering effect could be realized from liquid crystalline BCPs. The length of the resultant fibrillar supramolecular polymers (SP) is controlled by tuning the ratio between nucleating and growing components. Depending on the choice of BCPs, the SPs can be homopolymer‐like, heterogeneous triblock, and even pentablock copolymer‐like. More interestingly, with insoluble BCP as a nucleating component, amphiphilic SPs are fabricated, which can undergo spontaneous hierarchical assembly.

Glycidyl azide polymer (GAP) is an important type of energetic polymer and considered to be the most promising candidate for the polymeric binders for next generation of solid propellants. However,...

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The chemical structures of novel isolated-alkene-linked porous organic polymers (named BIT-POPs) were investigated through spectral editing techniques based on solid-state NMR.

Porous materials with structural flexibility have gained significant attention in recent years. However, the flexible porous organic polymers (POPs) have been rarely reported due to the lack of efficient synthesis. Herein, a rigid-flexible transformation strategy based on ring-opening metathesis polymerization (ROMP) was employed to synthesize the flexible polynorbornenes with isolated alkene linkage (BIT-POPs). The flexibility of asprepared BIT-POPs was investigated by low-field NMR based on the transverse relaxation time (T 2 ) of organic solvents. BIT-POP-10 can be used to decolor triisocyanate called Desmodur RE (DRE), with the decolorization efficiency of up to 99.5% and separation efficiency of up to 100%. Solid-state NMR (ssNMR) along with X-ray photoelectron spectroscopy revealed that the excellent performance of BIT-POP-10 for purification of DRE was attributed to the formation of intermolecular hydrogen bonding between the carbonyl groups of imides and amino groups of Basic Red 9 (BR-9).