Lanthanum Tris(2,6-di-tert-butyl-4-methylphenolate) as a Novel, Versatile Initiator for Homo- and Copolymerization of Cyclic Carbonates and Lactones

Ling, Jun

doi:10.1002/1521-3935(20020301)203:4<735::aid-macp735>3.0.co;2-w

Cited by 66 publications

(29 citation statements)

References 7 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…La(BH 4 ) 3 (THF) 3 and La(OAr) 3 were synthesized according to the methods described in the literatures. 24,25 All Other chemicals were used as received.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Homo- and Block Copolymerizations of ε-Decalactone with l-Lactide Catalyzed by Lanthanum Compounds

et al. 2013

Self Cite

View full text Add to dashboard Cite

Biobased and environmental-friendly polylactones provide a solution to the increasing crisis of fossilsourced products. Ring-opening polymerization (ROP) of ε-decalactone (DL) catalyzed by lanthanum tris(2,6-di-tert-butyl-4-methylphenolate) [La(OAr) 3 ] and lanthanum tris-(borohydride) [La(BH 4 ) 3 (THF) 3 ] is reported for the first time in this paper. Both of them exhibit good activities producing poly(ε-decalactone) (PDL) with molecular weight (MW) up to 26.4 kg/mol and polydispersity index (PDI) as low as 1.10. PLLA-b-PDL-b-PEG-b-PDL-b-PLLA pentablock copolymers with predictable MWs and relatively narrow PDIs (1.19−1.28) are synthesized by sequential ROP of DL and Llactide (LLA) catalyzed by La(OAr) 3 in the presence of poly(ethylene glycol) (PEG). Chain extension reactions of the obtained pentablock copolymers are carried out using L-lysine diisocyanate (LDI) to produce multiblock copolymers with relatively high MW. The thermal behaviors studied by DSC and DMA measurements indicate that PDL is completely amorphous under ambient temperature and the copolymers with two T g s suggest microphase separation of hard and soft domains. We employ tensile tests to assess mechanical properties and find excellent elongation up to 723% of the chain-extended samples. Considering the biorenewable resource of DL and LLA, a novel, biobased, biodegradable, and biocompatible elastomer is successfully synthesized.

show abstract

“…La(BH 4 ) 3 (THF) 3 and La(OAr) 3 were synthesized according to the methods described in the literatures. 24,25 All Other chemicals were used as received.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Homo- and Block Copolymerizations of ε-Decalactone with l-Lactide Catalyzed by Lanthanum Compounds

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…PCL and PCD were prepared according to our previous reports [13,29,30]. CL (5.200 g, 45.6 mmol) and DTC (0.460 g, 3.54 mmol) (in PCD case) were dissolved in 30 mL THF and La(OAr) 3 (1.1 mL, 0.069 mol/L in THF) catalyst was then added.…”

Section: Polymerizationmentioning

confidence: 99%

Controlled enzymatic degradation of poly(ɛ-caprolactone)-based copolymers in the presence of porcine pancreatic lipase

Peng

Ling

Liu

et al. 2010

Polymer Degradation and Stability

Self Cite

View full text Add to dashboard Cite

“…Ln-O bond was considered to be the active center based on the results obtained from lactone and lactide polymerization initiated by single-component rare earth phenolates researched by our group. 19,20 Therefore, the ring-opening polymerization of LA catalyzed by La(OTMP) 3 were described as coordination-insertion mechanism as illustrated in Scheme 1.…”

Section: Mechanism Aspectsmentioning

confidence: 99%

Ring‐opening Polymerization of D,L‐Lactide by Lanthanide Tris(2,4,6‐trimethylphenolate): Characteristics and Kinetics

Fan

Shen

2005

Chin. J. Chem.

View full text Add to dashboard Cite

Tris(2,4,6-trimethylphenolate) lanthanide [Ln(OTMP) 3 ] has been prepared and employed for ring-opening polymerization of D,L-lactide (LA) as single-component catalysts. The characteristics, kinetics and mechanism were examined. The polymerization is first-order with respect to monomer and initiator concentration, and the overall activation energy amounts to 62.9 kJ/mol. DSC curve disclosed the random structure of PLA. 1 H NMR spectrum analysis demonstrates that the polymerization of LA proceeded through acyl-oxygen bond cleavage.

show abstract

Lanthanum Tris(2,6-di-tert-butyl-4-methylphenolate) as a Novel, Versatile Initiator for Homo- and Copolymerization of Cyclic Carbonates and Lactones

Cited by 66 publications

References 7 publications

Homo- and Block Copolymerizations of ε-Decalactone with l-Lactide Catalyzed by Lanthanum Compounds

Homo- and Block Copolymerizations of ε-Decalactone with l-Lactide Catalyzed by Lanthanum Compounds

Controlled enzymatic degradation of poly(ɛ-caprolactone)-based copolymers in the presence of porcine pancreatic lipase

Ring‐opening Polymerization of D,L‐Lactide by Lanthanide Tris(2,4,6‐trimethylphenolate): Characteristics and Kinetics

Contact Info

Product

Resources

About