Synthesis and Cationic Polymerization of Bicyclo Orthoester-Based Poly(ε-caprolactone) Macromonomer and Depolymerization of the Obtained Graft Copolymer

Sanda, Fumio; Hitomi, Masakatsu; Endō, Takeshi

doi:10.1021/ma0101658

Cited by 20 publications

(11 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An example was provided by the cationic ring opening polymerization of poly(e-caprolactone) (PeCL) macromonomers carrying a bicyclo orthoester group. [63] The polymerization was conducted with BF 3 Á OEt 2 in CH 2 Cl 2 at À78 8C, shown in Scheme 12.…”

Section: Cationic Polymerizationmentioning

confidence: 99%

The Strength of the Macromonomer Strategy for Complex Macromolecular Architecture: Molecular Characterization, Properties and Applications of Polymacromonomers

Hadjichristidis

Pitsikalis

Iatrou

et al. 2003

Macromol. Rapid Commun.

219

209

View full text Add to dashboard Cite

The efficiency of the macromonomer (MM) synthetic strategy for the creation of nonlinear complex macromolecular architectures (miktoarm stars, α,ω‐branched polymers, random/exact comb and graft copolymers, dendritic polymers, molecular brushes) is reviewed. In addition, the solution/bulk properties and the potential applications of polymacromonomers (PMM), as well as new synthetic ideas are presented. The synthesis of macromonomers and living polymacromonomers in situ leads to many novel linear and nonlinear structures, as for example PMM‐b‐PS‐b‐PMM, (PS)2PMM. The use of multichlorosilylstyrenes as monomer/linking agents opens new ways for structures with multichain macromonomeric building blocks.The use of multichlorosilylstyrenes as monomer/linking agents opens new ways for structures having multichain macromonomeric building blocks.magnified imageThe use of multichlorosilylstyrenes as monomer/linking agents opens new ways for structures having multichain macromonomeric building blocks.

show abstract

Section: Cationic Polymerizationmentioning

confidence: 99%

The Strength of the Macromonomer Strategy for Complex Macromolecular Architecture: Molecular Characterization, Properties and Applications of Polymacromonomers

Hadjichristidis

Pitsikalis

Iatrou

et al. 2003

Macromol. Rapid Commun.

219

209

View full text Add to dashboard Cite

show abstract

“…The structure of the polymer chain of the macromonomer affects the properties of the graft copolymer while the polymerizable end group controls the reactivity during polymerization. Many functional groups with chemical reactivity have been studied for various types of polymerizations, including conventional free radical (Roos et al, 1999), group transfer (Ishizu & Kuwahara, 1994), anionic (Sanda et al, 2001), cationic (Yamada et al, 1999), controlled free radical (Nomura et al, 2000), and ring-opening metathesis (Nagasaki et al, 1994) polymerizations.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Mechanical Analysis of Urethane Acrylate Graft Copolymer Part A: Urethane Macromonomer Base on TDI and EG

Alshuiref¹,

Ibrahim²,

Abduallah³

et al. 2013

IJC

View full text Add to dashboard Cite

Urethane macromonomers (UMs) having different urethane chain lengths (X) were synthesized by the reaction of an isocyanate-terminated prepolymer with 2-hydroxy ethyl methacrylate (HEMA) and isopropanol. The existence and the structural identification of the UMs were verified by FTIR, 1 H NMR and 13 C NMR spectroscopy. Various percentages of the respective UMs (0-40 wt % acrylate monomers) were then incorporated into methyl methacrylate (MMA) and n-butyl methacrylate (n-BMA) backbones via solution free-radical copolymerization. The resulting methyl methacrylate-g-urethane and n-butyl methacrylate-g-urethane copolymers were characterized by GPC, 1 H NMR, 13 C NMR, FTIR, TGA and DMA. Phase separation between the urethane segment and the acrylate segment in the graft copolymerization products was investigated by DMA and TEM. DMA results showed that in most graft copolymer products the two respective component parts of PMMA-g-urethane or n-PBMA-g-urethane were compatible as only one T g was observed. Two glass transitions, at temperatures of 22 and 76 o C, corresponding to the n-PBMA and urethane moieties, were observed when the chain length of the UMs was increased from X=4 to X=32. Microphase separation was also evident in TEM measurement.

show abstract

“…Star‐shaped polymers have been received great interest since Schaefgen and Flory first proposed this concept in 194810 because of their unique properties such as impact‐resistant plastics, different phase behavior, thermoplastic elastomers, variety of morphologies, polymeric emulsifiers, sol–gel states, and gas permeation membranes 11–13. As another type of polymers with unique construction, comb‐shaped polymers have been studied widely, which are types of macromolecules with densely grafted side chains on a linear backbone 14, 15.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of star–comb‐shaped polymer with porphyrin‐core and its self‐assembly behavior study

Zhang

Wang

et al. 2012

J of Applied Polymer Sci

View full text Add to dashboard Cite

5,10,15,20-tetra(4-hydroxyphenyl)porphyrin (THPP) was synthesized by the condensation of pyrrole with 4-hydroxybenzaldehyde in the presence of solvent (propionic acid). Subsequently, the resulting THPP was converted to a tetrafunctional star-shaped macroinitiator (porphyrin-Br 4 ) by esterification of it with 2-bromopropanoyl bromide, and then atom transfer radical polymerization (ATRP) of styrene was conducted at 110 C with CuCl/2,2 0 -bipyridine as the catalyst system. The resulting product was reacted with NBS to obtain star-shaped initiator porphyrin-(PSt-Br) 4 , which was used the following ATRP of the GMA to synthesize star-comb-shaped grafted polymer porphyrin-(PSt-g-PGMA) 4 . The number molecular weight was 2.3 Â 10 4 g/mol, and the dispersity was narrow (M w /M n ¼ 1.32). The structure of the polymers was investigated by NMR, UV-vis, IR, and GPC measurement. The self-assembly behavior of the polymer porphyrin-(PStg-PGMA) 4 was studied by DLS and AFM.

show abstract

Synthesis and Cationic Polymerization of Bicyclo Orthoester-Based Poly(ε-caprolactone) Macromonomer and Depolymerization of the Obtained Graft Copolymer

Cited by 20 publications

References 13 publications

The Strength of the Macromonomer Strategy for Complex Macromolecular Architecture: Molecular Characterization, Properties and Applications of Polymacromonomers

The Strength of the Macromonomer Strategy for Complex Macromolecular Architecture: Molecular Characterization, Properties and Applications of Polymacromonomers

Thermal and Mechanical Analysis of Urethane Acrylate Graft Copolymer Part A: Urethane Macromonomer Base on TDI and EG

Synthesis of star–comb‐shaped polymer with porphyrin‐core and its self‐assembly behavior study

Contact Info

Product

Resources

About