Separation and characterization of poly(styrene-co-acrylonitrile)-graft-poly(propylene oxide) polymer stabilizer formed in dispersion polymerization of styrene and acrylonitrile in polyether

2001 ◽  
Vol 50 (12) ◽  
pp. 1379-1383 ◽  
Author(s):  
Ruiwei Guo ◽  
Xiandong Lu ◽  
Maosheng Hua ◽  
Daobin Fang ◽  
Kangde Yao
Keyword(s):  
Propylene Oxide ◽  
Dispersion Polymerization ◽  
Polymer Stabilizer ◽  
Poly Propylene

scholarly journals Fabrication and characterization of the ternary composite catalyst system of ZnGA/RET/DMC for the terpolymerization of CO2, propylene oxide and trimellitic anhydride

RSC Advances ◽  
2021 ◽  
Vol 11 (15) ◽  
pp. 8782-8792
Author(s):  
Ningzhang Liu ◽  
Chuanhai Gu ◽  
Qinghe Wang ◽  
Linhua Zhu ◽  
Huiqiong Yan ◽  
...  
Keyword(s):  
Propylene Oxide ◽  
Ternary Complex ◽  
Catalyst System ◽  
Composite Catalyst ◽  
Trimellitic Anhydride ◽  
Ternary Composite ◽  
Metal Cyanide ◽  
Fabrication And Characterization ◽  
Poly Propylene

For poly(propylene carbonate trimellitic anhydride) with good yield, thermal stability and high molecular weight, a catalyst of zinc glutarate/rare earth ternary complex/double metal cyanide was used for terpolymerization of CO2, propylene oxide and trimellitic anhydride.

scholarly journals Characterization of the Microstructure of Poly(propylene oxide)–Segmented Polyamide and Its Suppression of Platelet Adhesion

1984 ◽  
Vol 16 (2) ◽  
pp. 119-128 ◽  
Author(s):  
Nobuhiko Yui ◽  
Junko Tanaka ◽  
Kohei Sanui ◽  
Naoya Ogata ◽  
Kazunori Kataoka ◽  
...  
Keyword(s):  
Propylene Oxide ◽  
Platelet Adhesion ◽  
Poly Propylene

Synthesis and characterization of degradable triarm low unsaturated poly(propylene oxide)-block-polylactide copolymers

2010 ◽  
pp. n/a-n/a
Author(s):  
Dongmei Yang ◽  
Qi Lu ◽  
Zhongyong Fan ◽  
Suming Li ◽  
Jianjun Tu ◽  
...  
Keyword(s):  
Propylene Oxide ◽  
Synthesis And Characterization ◽  
Poly Propylene

Dispersion and improvement of organoclays in nanocomposites based on poly(propylene oxide)

2020 ◽  
pp. 089270572093917 ◽  
Author(s):  
Lahouari Mrah ◽  
Rachid Meghabar
Keyword(s):  
Electron Microscopy ◽  
Propylene Oxide ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Transmission Electron ◽  
The Matrix ◽  
Organic Clay ◽  
Poly Propylene

This work is mainly concentrated on the preparation and characterization of poly(propylene oxide) (PPO)/organic clay nanocomposites. The effects of the nature of organoclays and the method of preparation have been elucidated to evaluate their morphological, structural and thermal properties. These nanocomposites were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, thermal analysis (differential scanning calorimetry) and thermogravimetric analysis (TGA). This study involved the use of an Algerian clay called ‘maghnite’ which was modified by an incorporation method using different concentrations of the surfactant cetyltrimethylammonium bromide (CTAB). Propylene oxide (PO) was polymerized in the presence of ethylene glycol and various proportions of organic clay ranging from 1%, 5% and 10% by weight. The structural study by XRD showed, at different loading rates of maghnite and PO in the preparation of PPO/maghnite nanocomposites, different morphologies: intercalated/exfoliated blend and intercalated/agglomerated. TGA showed that the intercalation of PPO at the montmorillonite (MMT)-CTA interface would be more advantageous since the required amount of 5% organic clay (by weight) ensures high thermal stability of the nanocomposites, and the glass transition temperature ( T g) of PPO/MMT nanocomposites is higher than that of PPO since this increase is due to the introduction of clay into the matrix which makes the nanocomposite more rigid.

scholarly journals Preparation of Biocomposite Soft Nanoparticles Composed of Poly(Propylene Oxide) and the Polymer-Binding Peptides

Processes ◽  
2020 ◽  
Vol 8 (7) ◽  
pp. 859
Author(s):  
Toshiki Sawada ◽  
Hiroki Fukuta ◽  
Takeshi Serizawa
Keyword(s):  
Propylene Oxide ◽  
Polymeric Materials ◽  
Morphological Observation ◽  
Artificial Materials ◽  
Naturally Occurring ◽  
Potential Applicability ◽  
Binding Peptides ◽  
Poly Propylene ◽  
Biological Milieu

The molecular recognition capability of naturally occurring biomolecules is generally expressed against biomolecules in the biological milieu. Recently, it was demonstrated that the specific interactions of biomolecules such as short peptides were applicable to artificial materials. We have developed peptides with specific affinities for synthetic polymers toward functional biocomposite polymeric materials. In this study, we demonstrated the preparation of biocomposite nanoparticles composed of poly(propylene oxide) (PPO) and PPO-binding peptides. A simple injection of a concentrated PPO solution dissolved in an organic solvent into the peptide solution under sonication resulted in the formation of nanospherical structures. Morphological observation indicated characteristic softness and high applicability as a molecular carrier of the biocomposite nanoparticles. Structural characterization of PPO and the PPO-binding peptide revealed the structural conformability of these molecules to interact specifically with each other. Our findings expand the potential applicability of polymer-binding peptides for the future construction of biomedical materials composed of peptides and various polymers.

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