437615-64-0

Upstream product

• 216431-29-7 2-vinylterephthalic acid 

Downstream Products

• 1226773-26-7 C₂₂H₂₆N₂O₆ 
• 1226773-27-8 bis(N-hydroxypropylpyrrolidone) 2-vinylterephthalate 
• 244179-91-7 C₂₆H₂₄O₆ 
• 244179-95-1 C₃₄H₄₀O₆ 
• 244179-93-9 C₃₀H₃₂O₆ 
• 244179-97-3 C₃₈H₄₈O₆ 
• 1404166-33-1 2,5-bis[(4-decyloxyphenyl)oxycarbonyl]styrene 
• 1404166-35-3 2,5-bis[(4-dodecyloxyphenyl)oxycarbonyl]styrene 
• 1404166-37-5 2,5-bis[(4-tetradecyloxyphenyl)oxycarbonyl]styrene 
• 1404166-39-7 2,5-bis[(4-hexadecyloxyphenyl)oxycarbonyl]styrene 
• 1404166-41-1 2,5-bis[(4-octadecanalkoxylphenyl)oxycarbonyl]styrene 
• 1632329-35-1 2,5-bis{[3,5-di(4'-methoxy-4-oxyhexyloxy azobenzene)benzyl]oxycarbonyl}styrene 
• 1427270-56-1 2,5-bis[(4'-octadecyloxybiphenyl)oxycarbonyl]-styrene 
• 1402248-94-5 bis(N-(2-hydroxypropyl)pyrrolidone) 2-vinylterephthalate 

Relevant academic research and scientific papers

Steric interaction between flexible main chain and nonmesogenic cyclic pendants leading to thermotropic liquid crystalline property

Nonmesogenic cyclic alkylidene terephthalate is directly connected to flexible polyethylene main chain at every second carbon atom via the phenyl ring to obtain a novel vinyl polymer, poly(alkylidene vinylterephthalate) (PAVT-n), where n (= 10-14 and 16) denotes the number of methylene groups in the side chain. When the molecular weight is large enough, stable hexagonal columnar phases are generated from melt by the PAVT-n polymers with n = 10-13, but not by those containing 14 or 16 methylene groups. Compared with its open-ring counterpart, i.e., poly(dialkyl vinylterephthalate) (PDAVT-n) with linear side chains, PAVT-n has a glass transition temperature (Tg) over 100 °C higher, a much larger persistence length, and a much lower critical molecular weight to form a mesophase. In addition, PDAVT-n enters into isotropic liquid at Tg and becomes ordered at temperatures well above T g, whereas PAVT-n forms mesophases immediately above Tg. The strong steric interaction between cyclic pendants and the flexible main chain, which causes PAVT-n to take an extended chain conformation, is considered as the main driving force for PAVT-n to generate mesophases. In a sharp contrast, the mesophase formation of PDAVT-n is known to be an entropy-driven process.

Synthesis and phase structures of mesogen-jacketed liquid crystalline polyelectrolytes and their ionic complexes

Two mesogen-jacketed liquid crystalline polyelectrolytes, poly{sodium 2,5-bis[(4-sulfophenyl)aminocarbonyl]-styrene} and poly{sodium 2.5-bis[(4-sulfophenyl)oxycarbonyl]-styrene} with rigid cores containing different linkages at the center and sulfonate gr

Self-organization of cholesterol-side-chain liquid crystalline polymers by tailoring the main chain structure and flexible spacer length

Three kinds of side-chain liquid crystalline polymers (SCLCPs), in which cholesteryl mesogens (Chol) were linked to polyacrylate (PCholAC-m), polymethacrylate (PCholMC-m), and poly(2-vinylbenzene-1,4-dioate) (PCholVA-m) backbones through methylene spacers of different lengths (m = 0, 2, 4, 6, 8, and 10), were successfully synthesized using free-radical polymerization. The phase behavior and structure of the polymers were investigated in detail using DSC, POM, and SAXS. The results indicated that the Chol-SCLCPs displayed interesting self-organization by varying the main-chain structure and spacer length. The polymers initially form a smectic A phase, except for PCholAC-0 without a liquid crystalline phase. Next, polymers PCholAC-m (m = 2, 4, 6) formed a two-layer smectic A phase in which the alkyl tail was overlapped (SmA2). Two-phase coexisting structures were observed in PCholAC-m (m = 8, 10), including a bilayer smectic A phase in which the alkyl tail was inserted into the mesogens (SmAd) and a single-layer smectic A phase in which the mesogens were overlapped (SmA1). Similar results were observed for PCholMC-m. Furthermore, PCholMC-0 possessed a stable bilayer SmA2 owing to the methyl steric effect of the main chain. PCholVA-m (m = 0, 2, 4) samples showed a well-defined smectic A phase in which the backbone was squeezed by the parallel side chains on both sides. PCholVA-6 and PCholVA-10 exhibited a SmAd phase. The two-phase coexisting structures were also found in PCholVA-8. Finally, the glass transition temperature of the polymers decreased with increasing flexible spacer length because the flexible spacer acted as an internal plasticizer in the system. However, changes in the polymer clearing points demonstrated the diversity resulting from the different smectic A phase structures.

Synthesis and phase structures of dendronized polymers with dendritic azobenzene side groups based on mesogen-jacketed liquid crystalline polymers

The first- and second-generation dendronized polymers, poly (2, 5-bis {[3, 5-di (4′-methoxy-4-oxyhexyloxy azobenzene) benzyl] oxycarbonyl} styrene) (PG1) and poly (2, 5-bis {3, 5-di [3, 5-di (4′-methoxy-4-oxyhexyloxy azobenzene) benzyl] oxycarbonyl} styre

The effects of para-, meta- and ortho-monosubstituted azobenzene moiety in the side chain on phase behavior of mesogen-jacketed liquid crystalline polymers

Three different mesogen-jacketed liquid crystalline polymers with monosubstituted azobenzene moiety in the side-chain have been studied. These are poly(2,5-bis{[para-(4′-methoxy-4-oxyhexyloxy azobenzene) benzyl] oxycarbonyl} styrene) (denoted as PPABCS),

Synthesis and liquid crystalline behavior of 2,5-disubstituted styrene-based random copolymers: Effect of difference in length of the rigid core on the mesomorphic behavior of mesogen-jacketed liquid crystalline polymers

A series of binary copolymers, poly{2,5-bis[(4-octadecyloxyphenyl) oxycarbonyl]-styrene-co-2,5-bis[(4′-octadecyloxybiphenyl)oxycarbonyl] -styrene} (poly(M-OC18-co-M-C18)), were synthesized via free radical polymerization. The random nature of the copolymers was expected on the basis of the assumed similar reactivities because of the analogous monomers. A combination of differential scanning calorimetry (DSC), polarized optical microscopy (POM) and wide-angle X-ray diffraction (WAXD) demonstrated that phase behavior of this series of copolymers were strongly composition dependent. The P-OC18 formed smectic A phase, re-entrant isotropic phase and column nematic phase, while the P-C18 only exhibited the stable smectic A phase. The comparison between P-OC18 and P-C18 indicates that the length of the rigid core is crucial to determine the liquid crystalline (LC) structures. After copolymerization, the glass transition temperature and the phase transition temperature of the copolymers from smectic phase to isotropic phase both increased with the molar fraction of 2,5-bis[(4′-octadecyloxybiphenyl)oxycarbonyl]-styrene (M-C18) in feed. In addition, when the feed was below 0.3, a column nematic phase was observed in high temperature. Namely, simply through copolymerization, we can greatly vary LC behavior of the mesogen-jacketed liquid crystalline polymers.

Influence of alkoxy tail length on the self-organization of hairy-rod polymers based on mesogen-jacketed liquid crystalline polymers

A series of hairy-rod polymers, poly{2,5-bis[(4-alkoxyphenyl)oxycarbonyl] styrenes} (P-OCm, m = 1, 2, 4, 6, 8, 10, 12, 14, 16, and 18) were designed and successfully synthesized via free radical polymerization. The chemical structure of the monomers was confirmed by elemental analysis, 1H NMR and 13C NMR. The molecular characterizations of the polymers were performed with 1H NMR and gel permeation chromatography. The phase structures and transitions of the polymers were investigated by the combination of techniques including differential scanning calorimetry, wide-angle X-ray diffraction, polarized optical microscopy, and rheological measurement. The experimental results revealed that the self-assembly behaviors of P-OCm changed with the increase in m. First, the P-OCm (m = 1, 2) showed only a stable liquid crystalline phase above Tg. Second, with the increasing length of alkoxy tails, the P-OCm (m = 4, 6, 8) presented a re-entrant isotropic phase above Tg and a liquid crystalline phase at higher temperature. Third, the P-OCm (m = 10, 12, 14, 16, 18) exhibited an unusual re-entrant isotropic phase which was separating SmA (in low temperature) and columnar phases (in high temperature). It was the first time that mesogen-jacketed liquid crystalline polymers formed smectic phase, re-entrant isotropic phase, and columnar phases in one polymer due to the microphase separation and the driving force of the entropy.

Influences of hydrogen bonding and peripheral chain length on mesophase structures of mesogen-jacketed liquid crystalline polymers with amide side-chain linkages

A series of mesogen-jacketed liquid crystalline polymers, poly{2,5-bis[(4-alkoxyphenyl)aminocarbonyl]styrene} (P-Cm, where m is the number of carbon atoms in the alkoxy groups, and m = 1, 4, 8, 12), with an amide core and flexible tails of varying lengths on the two ends in the side chain were designed and successfully synthesized via conventional radical polymerization. The mesophase structures of these polymers were dependent on the number of carbon atoms in the peripheral chains. Wide-angle X-ray diffraction and polarized light microscopy results revealed that the polymers with m ≥ 4 could form smectic A phases, while a columnar nematic phase could be formed for the polymer with methoxy end groups (P-C1). The hydrogen bonding among the side-chain amide groups might play an important role in forming and stabilizing these liquid crystalline phases, which was suggested by the results from variable-temperature FTIR and 2D IR analyses.

Novel semirigid water-soluble thermoresponsive polymers based on mesogen-jacketed liquid crystal polymers

Two novel semirigid smart polymers based on mesogen-jacketed liquid crystal polymers were successfully synthesized via free radical polymerization, which showed both characteristic liquid crystal properties of mesogen-jacketed liquid crystal polymers and

Structure-property relationship of a series of novel mesogen-jacketed liquid-crystalline polymers containing semirigid side chain with different numbers of alkoxy terminal groups

A series of vinyl monomers, 2, 5-bis [(4-methoxy benzyl) oxycarbonyl] styrene (MBCS); 2, 5-bis [(3, 5-dimethoxy benzyl) oxycarbonyl] styrene (DMBCS) and 2, 5-bis [(3, 4, 5-trimethoxy benzyl) oxycarbonyl] styrene (TMBCS) were synthesized and polymerized vi