Synthesis, characterization and ring opening activity of barium mercaptoacetate towards ε-caprolactone

Anbarasan, R.; Kannammal, L.; Meenarathi, B.; Tung, Kuo‐Lun

doi:10.1007/s00289-018-2658-6

Cited by 7 publications

(5 citation statements)

References 39 publications

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“…In PET, OH (3446 cm −1 ), CH (2874, 2955 cm −1 ), CO (1725 cm −1 ) and COC (1100 cm −1 ) stretching modes, and CH out of plane bending vibration (721 cm −1 ) are assigned in their respective wavelength regions. This is in accordance with the literature report 32 . Figure 1(b) displays the FTIR spectrum of AlA nucleated PET.…”

Section: Resultssupporting

confidence: 92%

Effect of nucleating agents on the non‐isothermal crystallization and degradation kinetics of poly(ethylene terephthalate)

Thamizhlarasan

Meenarathi

Parthasarathy

et al. 2020

Polymers for Advanced Techs

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Poly(ethylene terephthalate) (PET) was synthesized by two steps, namely (a) transesterification and (b) polycondensation. Various analytical instruments were used for the characterization of neat PET. The sodium salt of nucleating agents added with PET was synthesized by the in‐situ method under the same experimental conditions. The influence of CO2Na, ONa, SO3Na, PO3Na on the crystallization properties of PET was tested. The aromatic SO3Na nucleated PET exhibited the highest crystallization temperature (Tc) value of 211.4°C with the degradation temperature (Td) value of 446.9°C. The energy of activation (Ea) for the degradation and crystallization of PET was determined using various kinetic models. The modified Avrami equation showed the 3D crystal growth of PET, which was further evidenced by polarized optical microscopy (POM). The second stage of degradation consumed a higher amount of thermal energy. The experimental results were compared with the literature values.

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Section: Resultssupporting

confidence: 92%

Effect of nucleating agents on the non‐isothermal crystallization and degradation kinetics of poly(ethylene terephthalate)

Thamizhlarasan

Meenarathi

Parthasarathy

et al. 2020

Polymers for Advanced Techs

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“…A signal at 2.3 ppm is due to the proton of -CO 2 CH 2 . A signal at 3.8 ppm is corresponding to -CH 2 proton of PCL [23]. A peak at 7.3 ppm is owing to the CDCl 3 solvent.…”

Section: Nmr Analysismentioning

confidence: 99%

“…3B. A signal at 172 ppm is related to the carbonyl carbon signal of PCL [23]. A peak at 62 ppm is assigned to the signal for alkoxy carbon.…”

Section: Nmr Analysismentioning

confidence: 99%

“…Similarly,aminoacids [17], Fe 3 O 4 nanoparticles [18], n-butanol [19], L-proline [20] and cellulose [21] were employed as an initiator for the ROP of CL [22]. Barium mercaptoacetate had been used as a lone chemical initiator for the polymerization of CL [23]. The Fe 3 O 4 /congored nanohybrid was used as an initiator for the polymerization of CL by ROP [24].…”

Section: Introductionmentioning

confidence: 99%

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Structural and Thermal Studies of Fluorescein and Rhodamin6G Grafted Diblock Copolymers

Anbarasan

Meenarathi²,

Parthasarathy

2021

J Inorg Organomet Polym

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The ring-opening polymerization (ROP) of tetrahydrofuran (THF) and ε-caprolactone (CL) was performed at 160 o C for 2 hr under N 2 ambiance by using two different dyes such as uorescein (Flur) and rhodamine6G (R6G) as novel initiators. The structure of the dye centered diblock copolymers was concluded by analyzing the NMR spectra. The melt transition temperature and thermal stability of the polymers were concluded by DSC and TGA. The FT-IR spectra concluded the structure of the dye grafted homopolymer and diblock copolymers. The increase in molecular weight (M w ) of the dye-centered diblock copolymer was concluded by the GPC measurement. The conjugation of dye with the polymer backbone was carried out by a single-step method.

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“…As a powerful strategy for the preparation of polyester, the organometallics‐promoted ring‐opening polymerization (ROP) of aliphatic lactones has attracted great attentions 5–8 . To date, plenty of organometallics have been demonstrated as efficient catalysts for the ROP of lactones, such as alkali metals (Li, 9 K 10–11 ), alkaline‐earth metals (Mg, 12–18 Ca, 19 Ba 20 ), aluminum, 21–25 tin, 26 rare‐earth metals 27–34 and some transition metals (Ti, 35 Zr, 36 V, 37 Fe, 38–39 Zn 40–43 ). Among them, the magnesium‐based complex has attracted special attention due to its high activity and low toxicity.…”

Section: Introductionmentioning

confidence: 99%

Halogenated β‐diketiminato magnesium complexes: Preparation, characterization, and catalysis for ring‐opening polymerization of aliphatic lactones

Mou

Xing

2022

Bulletin Korean Chem Soc

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The halogenated β‐diketiminato magnesium butyl complexes LXMgBu(THF) (X = Cl (1), Br (2)) and allyl complexes LXMg(allyl)(THF) (X = Cl (3), Br (4)) (LCl = ((2,6‐Cl2C6H3)N═C(Me)CH═C(Me)N(2,6‐Cl2C6H3)), LBr = ((2,6‐Br2C6H3)N═C(Me)CH═C(Me)N(2,6‐Br2C6H3)) were prepared and characterized. The treatment of butyl complex 2 with (S)‐1‐phenylethanol gave the corresponding alkoxide complex [LBrMgOCHMePh]2 (5), the dimeric structure of which was confirmed by single‐crystal x‐ray diffraction. When bulky diphenylmethanol was employed to react with Complex 2, THF‐ligated monomeric complex LBrMgOCHPh2(THF) (6) was afforded. The catalytic performances of these magnesium complexes for ring‐opening polymerization of ε‐caprolactone (ε‐CL), δ‐valerolactone (δ‐VL), and γ‐butyrolactone (γ‐BL) were evaluated.

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Synthesis, characterization and ring opening activity of barium mercaptoacetate towards ε-caprolactone

Cited by 7 publications

References 39 publications

Effect of nucleating agents on the non‐isothermal crystallization and degradation kinetics of poly(ethylene terephthalate)

Effect of nucleating agents on the non‐isothermal crystallization and degradation kinetics of poly(ethylene terephthalate)

Structural and Thermal Studies of Fluorescein and Rhodamin6G Grafted Diblock Copolymers

Halogenated β‐diketiminato magnesium complexes: Preparation, characterization, and catalysis for ring‐opening polymerization of aliphatic lactones

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