Saadet Dogu, Wilhelm Oppermann

Light Scattering Behavior of PNIPA Hydrogels at Different Temperatures

• Broschiertes Buch

Produktbeschreibung

The first part of the book aims at a careful inspection of the influence of temperature on the microstructure of PNIPA gels synthesized by free radical cross-linking copolymerization, FRC, in the range 10-27.5 °C, i.e. below LCST by means of static and dynamic light scattering methods.Many studies have shown that structures of networks obtained by free radical cross-linking copolymerization generally seem to be inhomogeneous in the q-range 0.1 nm-1. An alternative approach to obtain homogeneous gels is UV induced photo cross-linking polymerization, PC. Cross-links are expected to be introduced randomly in space for photo cross-linked gels.The purpose of the second part of this study is to compare network structures i.e. inhomogeneity, of the free radical cross-linking PNIPA gels (FRC gels) prepared at 25 °C to photo gels (PC gels) synthesized by photo cross-linking polymerization of (N-isopropylacrylamid)-2-(dimethylmaleimido)- N -ethyl-acrylamide, poly(NIPA-co-DMMIAAm) at observation temperatures 25, 20, 15, 10, 30 °C (in that sequence).It is expected that photo gels starting from semi-dilute polymer solution are more homogenous than free radical gels.

Produktdetails

• Verlag: Scholar's Press / Scholars' Press
• Seitenzahl: 108
• Erscheinungstermin: 18. März 2015
• Englisch
• Abmessung: 220mm x 150mm x 7mm
• Gewicht: 179g
• ISBN-13: 9783639762648
• ISBN-10: 3639762649
• Artikelnr.: 42589137

Autorenporträt

Ph.D chemist - Polymeric gels were studied during Master and Ph.D researchs. Doctoral degree is completed at Clausthal Technical University in "Physical Chemistry" department in Germany. Dynamic-Static Light Scattering and Rheology methods were generally used during the studies. 4 papers were published.