Ring-opening polymerization reaction of polyhedral oligomeric silsesquioxanes (POSSs) for preparation of well-controlled 3D skeletal hybrid monoliths

2013 ◽  
Vol 49 (3) ◽  
pp. 231-233 ◽  
Author(s):  
Hui Lin ◽  
Junjie Ou ◽  
Zhenbin Zhang ◽  
Jing Dong ◽  
Hanfa Zou
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Polymerization Reaction ◽  
Polyhedral Oligomeric Silsesquioxanes

scholarly journals Preparation and Characterization of Novel Electrospinnable PBT/POSS Hybrid Systems Starting from c-PBT

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Lorenza Gardella ◽  
Alberto Fina ◽  
Orietta Monticelli
Keyword(s):  
Hybrid Systems ◽  
Hybrid System ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Polymerization Reaction ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Polymer Backbone ◽  
Reactive Groups

Novel hybrid systems based on poly(butyleneterephthalate) (PBT) and polyhedral oligomeric silsesquioxanes (POSS) have been prepared by applying the ring-opening polymerization of cyclic poly(butyleneterephthalate) oligomers. Two types of POSS have been used: one characterized by hydroxyl functionalities (named POSS-OH) and another without specific reactive groups (named oib-POSS). It was demonstrated that POSS-OH acts as an initiator for the polymerization reaction, leading to the direct insertion of the silsesquioxane into the polymer backbone. Among the possible applications of the PBT/POSS hybrid system, the possibility to obtain nanofibers has been assessed in this work.

scholarly journals Thermal and Electrochemical Properties of Solid Polymer Electrolytes Prepared via Lithium Salt-Catalyzed Epoxide Ring Opening Polymerization

2021 ◽  
Vol 11 (4) ◽  
pp. 1561
Author(s):  
Gabrielle Foran ◽  
Nina Verdier ◽  
David Lepage ◽  
Arnaud Prébé ◽  
David Aymé-Perrot ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Polymer Electrolytes ◽  
Ring Opening ◽  
Lithium Salt ◽  
Ring Opening Polymerization ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Polymerization Reaction ◽  
Epoxide Ring ◽  
Epoxide Ring Opening

Solid polymer electrolytes have been widely proposed for use in all solid-state lithium batteries. Advantages of polymer electrolytes over liquid and ceramic electrolytes include their flexibility, tunability and easy processability. An additional benefit of using some types of polymers for electrolytes is that they can be processed without the use of solvents. An example of polymers that are compatible with solvent-free processing is epoxide-containing precursors that can form films via the lithium salt-catalyzed epoxide ring opening polymerization reaction. Many polymers with epoxide functional groups are liquid under ambient conditions and can be used to directly dissolve lithium salts, allowing the reaction to be performed in a single reaction vessel under mild conditions. The existence of a variety of epoxide-containing polymers opens the possibility for significant customization of the resultant films. This review discusses several varieties of epoxide-based polymer electrolytes (polyethylene, silicone-based, amine and plasticizer-containing) and to compare them based on their thermal and electrochemical properties.

scholarly journals Macromolecular Dyes by Chromophore-Initiated Ring Opening Polymerization of L-Lactide

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1979
Author(s):  
Francesca Cicogna ◽  
Guido Giachi ◽  
Luca Rosi ◽  
Elisa Passaglia ◽  
Serena Coiai ◽  
...  
Keyword(s):  
Ring Opening ◽  
Solid Phase ◽  
Photophysical Properties ◽  
Fluorescence Emission ◽  
Ring Opening Polymerization ◽  
Polymerization Process ◽  
Polymerization Reaction ◽  
Poly Lactic Acid ◽  
Electromagnetic Spectrum ◽  
Visible Part

End functionalized polylactides are prepared by ring opening polymerization of L-lactide in the presence of stannous octoate (Sn(Oct)2). Three chromophores, 9H-carbazol-ethanol (CA), 9-fluorenyl-methanol (FM), and 2-(4-(2-chloro-4-nitrophenylazo)-N-ethylphenylamino)ethanol (Disperse Red 13, DR), are for the first time used as co-initiators in the polymerization process. The polymerization reaction is initiated by conventional thermal treatment, but in the case of FM, microwave-assisted polymerization is also carried out. CA and FM absorb and emit in the UV portion of the electromagnetic spectrum, whereas DR absorbs in the visible part. The obtained end-capped polylactides derivatives show the same photophysical properties as the initiator, so they are “macromolecular dyes” (MDs) that can be used “as synthesized” or can be blended with commercial poly(lactic acid) (PLA). The blends of PLA with MDs have ultraviolet-visible (UV-Vis) absorption and fluorescence emission features similar to that of MDs and thermal properties typical of PLA. Finally, migration tests, carried out onto the blends of PLA with MDs and PLA with free chromophores, show that MDs are less released than free chromophores both in solution and in the solid phase.

scholarly journals Rationalizing the Reactivity of Mixed Allyl Rare-Earth Borohydride Complexes with DFT Studies

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 820
Author(s):  
Sami Fadlallah ◽  
Jashvini Jothieswaran ◽  
Iker Del Rosal ◽  
Laurent Maron ◽  
Fanny Bonnet ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Rare Earth ◽  
Ring Opening ◽  
Density Functional ◽  
Ring Opening Polymerization ◽  
Polymerization Reaction ◽  
Experimental Investigations ◽  
Dft Studies ◽  
Functional Theory ◽  
Activation Barriers

The reactivity of rare-earth complexes RE(BH4)2(C3H5)(THF)x (RE = La, Nd, Sm, Y, Sc) toward the Ring-Opening Polymerization (ROP) of ε-caprolactone (ε-CL) was rationalized by Density Functional Theory (DFT) calculations. Even if the polymerization reaction can be initiated by both RE-(BH4) and RE-allyl bonds, experimental investigations have shown that the initiation via the borohydride ligand was favored, as no allyl group could be detected at the chain-end of the resulting polymers. DFT studies could confirm these observations, as it was highlighted that even if the activation barriers are both accessible, the allyl group is not active for the ROP of ε-CL due to the formation of a highly stable intermediate that disfavors the subsequent ring-opening.

Green and sustainable synthesis of poly(δ-valerolactone) with TBD catalyzed ring-opening polymerization reaction

2021 ◽  
Author(s):  
Kai Cheng ◽  
Shiyao Lu ◽  
Kai Wang ◽  
Guangsheng Luo
Keyword(s):  
Efficient Method ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Polymerization Reaction ◽  
Aliphatic Polyester ◽  
Synthetic Route ◽  
Highly Efficient

Ring-opening polymerization (ROP) of lactones catalyzed by 1,5,7-triazabicyclo[4,4,0]decane-5-ene (TBD) is a highly efficient method for synthesizing aliphatic polyester materials. In order to create a green and sustainable synthetic route of...

scholarly journals Glycol-functionalized ionic liquids for high-temperature enzymatic ring-opening polymerization

RSC Advances ◽  
2018 ◽  
Vol 8 (63) ◽  
pp. 36025-36033 ◽  
Author(s):  
Hua Zhao ◽  
Lennox O. Afriyie ◽  
Nathaniel E. Larm ◽  
Gary A. Baker
Keyword(s):  
Thermal Stability ◽  
Molecular Weight ◽  
Ionic Liquids ◽  
High Temperature ◽  
High Molecular Weight ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
High Thermal Stability ◽  
Polymerization Reaction

New glycol-functionalized ionic liquids exhibit high thermal stability and are lipase-compatible, leading to a high molecular weight of polyester in the enzymatic ring-opening polymerization reaction.

scholarly journals Ring-opening Polymerization Reaction Mechanism of ε-Caprolactone Catalyzed by Bis(dibenzoylmethanato) zirconium(IV) Using PM3 Semi-Empirical Method

2021 ◽  
Vol 1811 (1) ◽  
pp. 012057
Author(s):  
Muhammad Yusuf ◽  
Ahmad Nasir Pulungan ◽  
Rizki Dwi Irmala Sari ◽  
Dinda Prihatini Fitri Amne ◽  
Rahmayani Siregar ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Empirical Method ◽  
Polymerization Reaction ◽  
Semi Empirical

scholarly journals Formation of epoxide-amine oligo-adducts as OH-functionalized initiators for the ring-opening polymerization of ε-caprolactone

2010 ◽  
Vol 6 ◽  
pp. 938-944 ◽  
Author(s):  
Julia Theis ◽  
Helmut Ritter
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Diglycidyl Ether ◽  
Transfer Hydrogenation ◽  
Polymerization Reaction ◽  
One Pot ◽  
Heterogeneous Catalytic ◽  
Addition Polymerization ◽  
Catalytic Transfer ◽  
Hydroxy Groups

Epoxide-amine oligo-adducts were synthesized via a one-pot microwave assisted heterogeneous catalytic transfer hydrogenation. Accordingly, 4-nitroanisole was reduced under microwave conditions to give 4-aminoanisole which reacted immediately with the diglycidyl ether of bisphenol A in an addition polymerization reaction to yield oligo(amino alcohol)s. The hydroxy groups of the new formed oligomers were used as the initiator for the ring-opening polymerization of ε-caprolactone to produce a graft copolymer.

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