The effect of a photopolymerizable poly(ε-caprolactone-co-glycolide) matrix on the cement reactions of tetracalcium phosphate and tetracalcium phosphate–monocalcium phosphate monohydrate mixtures

Vreken, Natasja M. F. van den; Dubruel, Peter; Verbeeck, Ronald

doi:10.1039/c3tb00505d

Cited by 1 publication

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“…Given the better performance of complex 1, we applied this catalyst to the copolymerization of ε-CL and glycolide (GL), which is a copolymer that is widely used in industry [36][37][38]. The copolymerization reactions were conducted at 100 • C by adding the BnOH, ε-CL and glycolide (GL) together in the ratio [CL:GL]:[cat]:[BnOH] = [350:150]: [1]: [1] or [250:250]: [1]: [1].…”

Section: The Rop Of Copolymer P(cl-co-gl) Catalyzed By the Aluminum Complexesmentioning

confidence: 99%

Alkoxy-Functionalized Schiff-Base Ligation at Aluminum and Zinc: Synthesis, Structures and ROP Capability

et al. 2021

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The Schiff-base compounds 2,4-di-tert-butyl-6-(((3,4,5-trimethoxyphenyl)imino)methyl)phenol (L1H), 2,4-di-tert-butyl-6-(((2,4,6-trimethoxyphenyl)imino)methyl)phenol (L2H), 2,4-di-tert-butyl-6-(((2,4-trimethoxyphenyl)imino)methyl)phenol) (L3H) derived from anilines bearing methoxy substituents have been employed in the preparation of alkylaluminum and zinc complexes. Molecular structure determinations reveal mono-chelate aluminum complexes of the type [Al(Ln)(Me)2] (L1, 1; L2, 2; L3, 3), and bis(chelate) complexes for zinc, namely [Zn(Ln)2] (L1, 5; L2, 6; L3, 7). All complexes have significant activity at 50 °C and higher activity at 100 °C for the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) with good control over the molar mass distribution (Mw/Mn < 2) and molecular weight. Complex 1 was found to be the most active catalyst, achieving 99% conversion within 18 h at 50 °C and giving polycaprolactone with high molecular weight; results are compared against aniline-derived (i.e., non-methoxy containing) complexes (4 and 8). Aluminum or zinc complexes derived from L1 exhibit higher activity as compared with complexes derived from L2 and L3. Complex 1 was also tested as an initiator for the copolymerization of ε-CL and glycolide (GL). The CL-GL copolymers have various microstructures depending on the feed ratio. The crosslinker 4,4′-bioxepane-7,7′-dione was used in the polymerization with ε-CL using 1, and well-defined cross-linked PCL was afforded of high molecular weight.

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Section: The Rop Of Copolymer P(cl-co-gl) Catalyzed By the Aluminum Complexesmentioning

confidence: 99%

Alkoxy-Functionalized Schiff-Base Ligation at Aluminum and Zinc: Synthesis, Structures and ROP Capability

et al. 2021

View full text Add to dashboard Cite

show abstract

The effect of a photopolymerizable poly(ε-caprolactone-co-glycolide) matrix on the cement reactions of tetracalcium phosphate and tetracalcium phosphate–monocalcium phosphate monohydrate mixtures

Cited by 1 publication

References 57 publications

Alkoxy-Functionalized Schiff-Base Ligation at Aluminum and Zinc: Synthesis, Structures and ROP Capability

Alkoxy-Functionalized Schiff-Base Ligation at Aluminum and Zinc: Synthesis, Structures and ROP Capability

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