Solution thermal properties of a family of thermo-responsive N-isopropyl acrylamide-co-N-hydroxymethyl acrylamide copolymers – Aspects intrinsic to the polymers

2012 ◽  
Vol 72 (1) ◽  
pp. 77-82 ◽  
Author(s):  
Abdirahman Saeed ◽  
Dominique M.R. Georget ◽  
Andrew G. Mayes
Keyword(s):  
Thermal Properties ◽  
Isopropyl Acrylamide ◽  
Acrylamide Copolymers

Rheological and thermal properties of acrylonitrile-acrylamide copolymers: Influence of polymerization temperature

2005 ◽  
Vol 6 (2) ◽  
pp. 103-107 ◽  
Author(s):  
Xueping Wu ◽  
Chunxiang Lu ◽  
Gangping Wu ◽  
Rui Zhang ◽  
Licheng Ling
Keyword(s):  
Thermal Properties ◽  
Polymerization Temperature ◽  
Acrylamide Copolymers

Investigation of the luminescence, mechanical, and thermal properties of ZnO-entrapped poly(N-isopropyl acrylamide) gels

2017 ◽  
Vol 51 (29) ◽  
pp. 4079-4090 ◽  
Author(s):  
Nesrin Celebioglu ◽  
Yasar Yilmaz
Keyword(s):  
Thermal Properties ◽  
Zno Nanoparticles ◽  
Fluorescence Spectra ◽  
Mechanical And Thermal Properties ◽  
Size Distributions ◽  
Uv Emission ◽  
Isopropyl Acrylamide ◽  
Cross Linker ◽  
The Cross ◽  
Average Size

ZnO nanoparticles were synthesized in the pores that are formed inside the PNIPAm (poly(N-isopropyl acrylamide)) gels during polymerization. Different pore regions were obtained with changing the cross-linker concentrations of gels. We concluded from the SEM results that when the cross-linker concentration of the gels is increased, the average size of the pores becomes narrower. Thus, depending on the internal porosity of the gel, the size and distribution of ZnO nanoparticles were changed and accordingly it ranged in the fluorescence spectra. It is observed that fluorescence spectra of ZnO nanoparticles released from PNIPAm gel with low cross-linker concentration have only UV emission, while the nanoparticles released from PNIPAm gel with high cross-linker concentration have both the UV and the green emissions of ZnO. The size distributions of these nanoparticles were measured by Stabino-Nanoflex analyzer and it clearly indicates that the width of the size distribution decreases with increasing cross-linker concentration. To see the effect of ZnO nanoparticles on the properties of the gel, we investigated the luminescence, mechanical, and thermal properties of these ZnO/PNIPAm composites and plain gels of which the internal morphology was set by changing the cross-linker concentration. The nature of interactions between the nanoparticles and polymer strands affects both mechanical and thermal behaviors. Compared to plain gels, entrapping ZnO nanoparticles into the gels cause an increased compressive elastic modulus and strength. We proved that ZnO nanoparticles improve considerably the mechanical properties of PNIPAm gels.

Synthesis and conformational behaviour of luminescently labelled poly[styrene-graft-(N-isopropyl acrylamide)] copolymers

2006 ◽  
Vol 55 (7) ◽  
pp. 740-748 ◽  
Author(s):  
Chong-Kooi Chee ◽  
Stephen Rimmer ◽  
Ian Soutar ◽  
Linda Swanson
Keyword(s):  
Isopropyl Acrylamide ◽  
Acrylamide Copolymers

The thermal properties of some amine tetraphenylboron salts8-Quinolinol and its derivatives

1960 ◽  
Vol 23 ◽  
pp. 332-336 ◽  
Author(s):  
W WENDLANDT ◽  
J VANTASSEL ◽  
G ROBERTHORTON
Keyword(s):  
Thermal Properties
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