The application of organic polyethylene glycol-polyaniline multi-alternating block (more than triblock) copolymer in polymer-based dielectric composites

2021 ◽  
pp. 105139
Author(s):  
Danian Liu ◽  
Jingwen Wang ◽  
Wenhai Peng ◽  
Xinzhu Wang ◽  
Hua Ren ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Triblock Copolymer

scholarly journals Effect of molecular weight of polyethylene glycol on crystallization behaviors, thermal properties and tensile performance of polylactic acid stereocomplexes

RSC Advances ◽  
2020 ◽  
Vol 10 (69) ◽  
pp. 42120-42127
Author(s):  
Ruilong Li ◽  
Yifan Wu ◽  
Zhuyu Bai ◽  
Jianbing Guo ◽  
Xiaolang Chen
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Lactic Acid ◽  
Thermal Properties ◽  
Polyethylene Glycol ◽  
Polylactic Acid ◽  
Triblock Copolymer ◽  
Thermal And Mechanical Properties ◽  
Crystallization Behaviors ◽  
Tensile Performance

In this work, the poly(d-lactic acid)–polyethylene glycol–poly(d-lactic acid) (PDLA–PEG–PDLA) triblock copolymer as a novel modification agent was incorporated into poly(l-lactic acid) (PLLA) to improve the thermal and mechanical properties of PLLA.

Lactoferrin-conjugated pH and redox-sensitive polymersomes based on PEG-S-S-PLA-PCL-OH boost delivery of bacosides to the brain

Nanoscale ◽  
2018 ◽  
Vol 10 (37) ◽  
pp. 17781-17798 ◽  
Author(s):  
Kritika Goyal ◽  
Arpita Konar ◽  
B. S. Hemanth Kumar ◽  
Veena Koul
Keyword(s):  
Polyethylene Glycol ◽  
Polylactic Acid ◽  
Triblock Copolymer ◽  
The Brain

In the present study, engineered lactoferrin (Lf)-conjugated pH and redox-sensitive polymersomes derived from the triblock copolymer polyethylene glycol-S-S-polylactic acid-polycaprolactone (PEG-S-S-PLA-PCL-OH) have been used to deliver bacosides to the brain.

Synthesis and Characterization of Novel PCA-PEG-PCA Triblock Copolymer

2012 ◽  
Vol 499 ◽  
pp. 95-98
Author(s):  
Jun Chang ◽  
Cheng Wu Li ◽  
Gang Li
Keyword(s):  
Polyethylene Glycol ◽  
Triblock Copolymer ◽  
Chloroacetic Acid ◽  
Raw Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Solution Polycondensation ◽  
Ft Ir Spectroscopy

Using chloroacetic acid(CA) and polyethylene glycol(PEG) as raw material, polyacetic acid-polyethylene glycol-polyacetic acid(PCA-PEG-PCA) triblock copolymer was synthesized by solution polycondensation. The triblock copolymer was characterized by FT-IR spectroscopy、X-Ray Diffraction and DSC. The structure of copolymer was confirmed by FT-IR. The crystallinity of compolymer was 51.24% investigated by XRD, and the result of DSC showed the PCA and PEG was homogeneous with a good compatibility.

Immunocytochemical detection of hepatic carbohydrate metabolic enzymes: Improved resolution with polyethylene glycol embedding and visio-bond semithin sections

1992 ◽  
Vol 50 (1) ◽  
pp. 792-793
Author(s):  
Kuixiong Gao ◽  
Randal E. Morris ◽  
Bruce F. Giffin ◽  
Robert R. Cardell
Keyword(s):  
Polyethylene Glycol ◽  
Glycogen Phosphorylase ◽  
Phosphoenolpyruvate Carboxykinase ◽  
Glycogen Synthase ◽  
Metabolic Enzymes ◽  
Silver Stain ◽  
Accurate Localization ◽  
Immunocytochemical Detection ◽  
Semithin Sections ◽  
Parenchymal Cells

Several enzymes are involved in the regulation of anabolic and catabolic pathways of carbohydrate metabolism in liver parenchymal cells. The lobular distribution of glycogen synthase (GS), phosphoenolpyruvate carboxykinase (PEPCK) and glycogen phosphorylase (GP) was studied by immunocytochemistry using cryosections of normal fed and fasted rat liver. Since sections of tissue embedded in polyethylene glycol (PEG) show good morphological preservation and increased detectability for immunocytochemical localization of antigenic sites, and semithin sections of Visio-Bond (VB) embedded tissue provide higher resolution of cellular structure, we applied these techniques and immunogold-silver stain (IGSS) for a more accurate localization of hepatic carbohydrate metabolic enzymes.

Morphological transformations in solution-cast Styrene-Butadiene-Styrene (SBS) triblock copolymer thin films

1995 ◽  
Vol 53 ◽  
pp. 184-185
Author(s):  
Ginam Kim ◽  
W. Marsillo ◽  
M. Libera
Keyword(s):  
Thin Films ◽  
Triblock Copolymer ◽  
Annealing Treatment ◽  
Minor Component ◽  
Solvent Evaporation ◽  
Single Crystal Substrate ◽  
Transparent Films ◽  
Crystal Substrate ◽  
Solution Cast ◽  
Morphological Transformations

The fact that block copolymers can assume a range of morphologies depending upon such variables as relative block length and molecular weight is now well known. In the case of poly(styrene)[PS]-poly(butadiene)[PB]-poly(styrene) (SBS) triblock copolymer, the morphologies range from spheres (roughly ~20% minor component), to cylinders (roughly 20%~35% minor component), to lamellae (roughly equal component fractions) Most recently, there has been increasing interest in transformations between morphologies by thermal annealing. This paper describes initial results studying the effect of solvent evaporation rate and post-casting annealing treatment on the morphology of SBS thin films.TEM specimens were prepared by solution casting electron transparent films. 50 μl of 0.1 wt% SBS (30% styrene, Mw=14,000, Scientific Polymer Products, Inc.) dissolved in toluene was deposited on a polished NaCl single crystal substrate placed in a small dish. After solvent evaporation the film was cut into small squares, floated from the salt in water, and each square was collected on a Cu grid.

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