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A novel triamine (1) with tert-butyl side group, N1,N1-bis(4-aminophenyl)-4-(tert-butyl)benzene-1,3-diamine, is synthesized and then polymerized with the dianhydride 6FDA (A2) at the different feed molar ratio. Monitoring by 1H NMR spectrum, the reactivity of 3-amino group with ortho-tert-butyl is much lower than that of 4′/4″-amino groups in triamine 1. Thus AB2-type amic acid (B’A2 intermediates)...
A new class of polymeric colloids, multiple suspension particles (MSP), with a size of several micrometers consisting of many small polystyrene particles with a diameter below 100 nm grown in a poly (N-isopropyl acrylamide) precursor scaffold is obtained, as reported in our previous paper. Herein, the unique MSP are applied as template for silica nanocasting and hierarchically organized porous silica...
We have an ongoing interest in the design and control of helical conformation of water-soluble meta-linked poly(phenylene ethynylene)s (PPEs) and the further development of novel functional materials. Four cationic meta-linked PPEs (P1′-P4′) were synthesized to study the influence of differences in the backbone and side chain structure on their conformations. For P1′ and P4′ without side chains on...
Sequence distribution in the Living anionic copolymerization of Styrene and strong electron-donating DPE derivative, i.e. the 1,1-bis(4-N,N-dimethylanimophenyl)ethylene (DPE-(NMe2)2), was investigated by a timing-sample method. The target taken samples were characterized by SEC and 1H NMR in detail According to the research data based on integrating all the taken samples, the synthesized copolymer...
Tough polyacrylamide gel containing hydrophobic crosslinking (HPAAm gel) was easily synthesized by γ-radiation induced micelle copolymerization and crosslinking of a hydrophobic monomer, stearyl acrylate (STA), and acrylamide. HPAAm gel could still keep intact after compressed to the strain of 0.9 while the corresponding polyacrylamide gel prepared by adding chemical crosslinker has been broken. Meanwhile,...
Two new aromatic diamines, 3-tert-butyl-4,4′-diaminodiphenyl ether (1) and 3,3′-di(tert-butyl)-4,4′-diaminodiphenyl ether (2), were synthesized by the Ullmann coupling reaction. Both of them were used to prepare polyimides via one-step polycondensation with some commercial aromatic dianhydrides. The effect of tert-butyl groups on the physical–chemical properties of the resulting polyimides was investigated...
Three carbazole based building blocks with similar propeller-like steric configuration are designed and synthesized. The polycarbazole networks P-4, 4′-biscarbazolyl-phenyl (P-BCz), P-tetracarbazolyl-p-difluorobenzene (P-TCz) and P-hexacarbazolyl-phenyl (P-HCz) are obtained with high surface areas and uniform ultramicropores. The aggregation morphologies of networks vary from regular spherical particles,...
Bio-based polylactide/poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PLA/PHBV) blend fibers have been prepared via the conventional melt-spinning and hot-drawing process. The spinnability was optimized by determining the narrow temperature window for each blend via rheological studies. The blend fibers showed unexpectedly improved heat-resistance and softness along with acceptable tensile properties,...
Two novel water-soluble hyperbranched poly(p-phenyleneethynylene)s (HBP1′ and HBP2′) bearing different contents of oligo(ethylene oxide) (OEO) side chains with ammonium end groups were synthesized by the facile “A 2 + B 2 (or A 2 ′) + C 3 ” protocol based on Sonogashira polymerization. Their linear analog (LP2′) was also synthesized for comparative investigation. The...
Stereoregular high polymers of poly(l-lactic acid) (PLLA) (M w 1.2 × 10 5 , isotacticity 96.0%) and poly(d-lactic acid) (PDLA) (M w 1.0 × 10 5 , isotacticity 98.6%) were successfully synthesized via melt/solid polycondensation (MP/SSP) using a biogenic catalyst creatinine (CR). The follow-up monitor of the polycondensation products with 13 C NMR technique revealed...
We propose a general reaction induced hetero-epitaxial crystallization strategy for the preparation of high performance aromatic polymers/CNT nanohybrid shish-kebab structures, typical aromatic polymers such as polyazomethine and polyimide have been successfully decorated on the surface of CNTs through this novel approach. It is interesting to note that the introduction of dynamic imine chemistry...
In order to investigate the explicit electro-optical properties and self-assembly variations of the photoluminescent polymer with sterically hindered side chains, two novel polymers (P0 and P1) based on fluorene, pyridine and thiophene moieties were successfully synthesized through Suzuki coupling reaction. The molecular structures of the polymers were fully characterized by 1 H NMR, 13...
Isotactic polycondensation of l-lactic acid (LLA) catalyzed by biogenic creatinine was carried out at 140–175 °C under sequentially reduced pressure (30–10 torr). The product poly-LLA (PLLA) possesses high optical purity (e.e. 96.1–98.7%) as well as narrow molecular weight distribution (PDI 1.74–1.85). 13 C NMR follow-up monitor of the polymerization demonstrated that the isotacticity of PLLA...
A facile “one-pot” emulsion polymerization is reported to prepare surface-functionalized sub-micron spheres using novel amphiphilic comonomer as the reactive emulsifier. Specifically, amphiphilic 3-[2-(acryloyloxy)ethoxy]-3-oxopropyl(phenyl) phosphinic sodium (AEOPS) was used not only as a comonomer, but also as a good emulsifier for the polymerization due to the relatively long chain of amphiphilic...
The series of trichlorotitanium 2-(2-pyridinyliminomethyl)phenolates, [4,6-tBu 2 C 6 H 2 O-2–CHNC 5 R 1–4 N]TiCl 3 (R 1–4 = H (1); R 1,3,4 = H, R 2 = Me (2); R 1,2,4 = H, R 3 = Me (3); R 2,4 = H, R 1,3 = Me (4); R 1,3 = H, R 2 = CF 3 , R 4 = Cl (5)), were...
Two novel copolymers P1 and P2 were prepared by using the polymerizable aryl phosphine oxide based Eu(TTA) 3 VBCzDPO (EuM) (VBCzDPO = 3,6-bis(diphenyl-phosphoryl)-9-(4- vinylbenzyl)-9H-carbazole) and vinylcarbazole as the monomers with the compositions of 1:99 and 1:33, respectively. It is showed that the stronger coordinate ability of bidentate APO ligands facilitates the stability of the...
A novel functionalized norbornene-based copolymer with long poly(ɛ-caprolactone) side chain and cyano group was synthesized in the combination of ring-opening polymerization and ring-opening metathesis polymerization, which was characterized by means of 1 H NMR, gel permeation chromatography, thermogravimetry, differential scanning calorimetry, wide-angle X-ray diffraction, and stress–strain...
A combination of ring-opening metathesis polymerization (ROMP) and click chemistry approach was utilized for the first time in preparation of multiblock copolymers. The dibromo-functionalized telechelic poly(butadiene) (PBD) was synthesized firstly by ROMP of 1,5-cyclooctadiene in the presence of a symmetrical difunctional chain transfer agent and transformed into diazido-telechelic PBD, which was...
We synthesized the polyhedral oligomeric silsesquioxane (POSS) derivatives octakis[dimethyl(phenethyl)siloxy]silsesquioxane (OS-POSS), octakis[dimethyl(4-acetoxy phenethyl)siloxy]silsesquioxane (OA-POSS), and octakis[dimethyl(4-hydroxyphenethyl)siloxy] silsesquioxane (OP-POSS) through hydrosilylation with octakis(dimethylsiloxy)silsesquioxane (Q 8 M 8H ). To investigate the influence...
In order to investigate the electro-optical property variations among the target topology-varied polymers with diverse molecular architectures, a series of polymers (P0–P2), having sterically hindered side chains, based on fluorene and pyridine derivatives were successfully synthesized via simple synthetic route and fully characterized via various spectroscopic methods and cyclic voltammetry measurements...
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