Ring-opening graft copolymerization of epoxide with polyaniline: Chemical properties and lithium ionic conductivity of the copolymer

2001 ◽  
Vol 39 (18) ◽  
pp. 3137-3142 ◽  
Author(s):  
Isao Yamaguchi ◽  
Takuma Yasuda ◽  
Takakazu Yamamoto
Keyword(s):  
Ionic Conductivity ◽  
Ring Opening ◽  
Graft Copolymerization ◽  
Chemical Properties

scholarly journals Synthesis and applications of nanoporous perovskite metal oxides

2018 ◽  
Vol 9 (15) ◽  
pp. 3623-3637 ◽  
Author(s):  
Xiubing Huang ◽  
Guixia Zhao ◽  
Ge Wang ◽  
John T. S. Irvine
Keyword(s):  
Ionic Conductivity ◽  
Metal Oxides ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Oxygen Mobility ◽  
Redox Behaviour ◽  
The Past ◽  
Physical And Chemical ◽  
Perovskite Type ◽  
And Chemical Properties

Perovskite-type metal oxides have been widely investigated and applied in various fields in the past several decades due to their extraordinary variability of compositions and structures with targeted physical and chemical properties (e.g., redox behaviour, oxygen mobility, electronic and ionic conductivity).

Synthesis and properties of poly(1,3-dioxolane) in-situ quasi-solid-state electrolytes via rare-earth triflate catalyst

2021 ◽  
Author(s):  
Guuanming Yang ◽  
Yanfang Zhai ◽  
Jianyao Yao ◽  
Shufeng Song ◽  
Liyang Lin ◽  
...  
Keyword(s):  
Rare Earth ◽  
Solid State ◽  
Ionic Conductivity ◽  
Ring Opening ◽  
Room Temperature ◽  
Ring Opening Polymerization ◽  
Solid State Electrolytes

We report rare-earth triflate catalyst Sc(OTf)3 for ring-opening polymerization of 1,3-dioxolane in-situ producing quasi-solid-state poly(1,3-dioxolane) electrolyte, which not only demonstrates superior ionic conductivity of 1.07 mS cm-1 at room temperature,...

scholarly journals NOVEL PALM OIL BASED POLYOLS WITH AMINE FUNCTIONALITY SYNTHESIS VIA RING OPENING REACTION OF EPOXIDIZED PALM OIL

2018 ◽  
Vol 80 (6) ◽  
Author(s):  
Sabrina Soloi ◽  
Rohah Abdul Majid ◽  
Abdul Razak Rahmat
Keyword(s):  
Reaction Time ◽  
Palm Oil ◽  
Ring Opening ◽  
Market Price ◽  
Chemical Properties ◽  
Oxirane Ring ◽  
Epoxidized Palm Oil ◽  
Ring Opening Reaction ◽  
Twin Band ◽  
Physical And Chemical

In polymer chemistry, polyol usually used as starting materials for polyurethane (PU) production in which upon reacted with isocyanate will affect the physical and chemical properties of the obtained PU. Polyols that are mostly derived from petrochemical resources are facing issues such as depletion of petroleum sources as well as the increasing in market price. Ring opening reaction (ROR) of epoxidized palm oil (EPO) had been carried out using isopropanolamine (IPA) to impart polyol with amine functionality. The effect of reaction time on the opening of oxirane ring was investigated. FTIR spectra showed that the oxirane ring opening of EPO can occur at 6 hours reaction time, corresponding to the deacreasing intensity of  oxirane COO twin band at 824-830 cm-1. The OH value of the amine- functionalized-polyol was calculated at around 240-253 mg KOH/g. By prolonging the reaction time the OH value has slightly reduced. Mass spectroscopy analysis revealed that the polyol has a molecular weight in the range of oligo-polyols (400 – 500 Da).

scholarly journals ROMP-Derived cyclooctene-based monolithic polymeric materials reinforced with inorganic nanoparticles for applications in tissue engineering

2010 ◽  
Vol 6 ◽  
pp. 1199-1205 ◽  
Author(s):  
Franziska Weichelt ◽  
Solvig Lenz ◽  
Stefanie Tiede ◽  
Ingrid Reinhardt ◽  
Bernhard Frerich ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Stromal Cells ◽  
Ring Opening ◽  
Chemical Properties ◽  
Polymeric Materials ◽  
Human Adipose Tissue ◽  
Calcium Hydroxyapatite ◽  
Inorganic Nanoparticles ◽  
Physico Chemical ◽  
Scaffold Materials

Porous monolithic inorganic/polymeric hybrid materials have been prepared via ring-opening metathesis copolymerization starting from a highly polar monomer, i.e., cis-5-cyclooctene-trans-1,2-diol and a 7-oxanorborn-2-ene-derived cross-linker in the presence of porogenic solvents and two types of inorganic nanoparticles (i.e., CaCO3 and calcium hydroxyapatite, respectively) using the third-generation Grubbs initiator RuCl2(Py)2(IMesH2)(CHPh). The physico-chemical properties of the monolithic materials, such as pore size distribution and microhardness were studied with regard to the nanoparticle type and content. Moreover, the reinforced monoliths were tested for the possible use as scaffold materials in tissue engineering, by carrying out cell cultivation experiments with human adipose tissue-derived stromal cells.

Graft Copolymerization of Chitosan with L-Lactide under Microwave Irradiation

2015 ◽  
Vol 778 ◽  
pp. 120-123
Author(s):  
Ye Tian ◽  
Qing Hui Zeng ◽  
Ya Qing Ren ◽  
Xiao Fan He
Keyword(s):  
Thermal Stability ◽  
Low Temperature ◽  
Microwave Irradiation ◽  
Physical Properties ◽  
Ring Opening ◽  
Chemical Structure ◽  
Graft Copolymerization ◽  
Short Time

Poly (L-lactide) was grafted onto chitosan by ring-opening copolymerization under microwave irradiation in the presence of tin octoate (Sn (Oct)2) as catalyst. The chemical structure and physical properties of the copolymers with different feeding ratios were discussed by FTIR, DTG and X-RD, taking pure chitosan as reference. The results showed that the application of microwave irradiation in the reaction could achieve the copolymer with high grafting percentage in a short time and low temperature. The thermal stability and crystallinity were decreased with the feeding ratio increasing, attributing to the increasing of grafting percentage.

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