Glass Transition Behavior of Clay Aerogel/Poly(vinyl alcohol) Composites

2006 ◽  
Vol 39 (19) ◽  
pp. 6537-6545 ◽  
Author(s):  
Suneel Bandi ◽  
David A. Schiraldi
Keyword(s):  
Glass Transition ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Transition Behavior

Glass transition and crystallization of poly(vinyl alcohol)-g-poly(methyl methacrylate) graft copolymers

Polymer ◽  
1994 ◽  
Vol 35 (14) ◽  
pp. 3122-3126 ◽  
Author(s):  
Yingming Yao ◽  
Lizhi Liu ◽  
Hong Li ◽  
Tianru Fang ◽  
Enle Zhou
Keyword(s):  
Glass Transition ◽  
Methyl Methacrylate ◽  
Vinyl Alcohol ◽  
Graft Copolymers ◽  
Poly Vinyl Alcohol ◽  
Poly Methyl Methacrylate

scholarly journals Real-time tracking the Li+-ion transition behavior and dynamics in solid Poly(vinyl alcohol)/LiClO4 electrolytes

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Lixia Bao ◽  
Xin Zou ◽  
Xin Luo ◽  
Yanlei Pu ◽  
Jiliang Wang ◽  
...  
Keyword(s):  
Real Time ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Transition Behavior ◽  
Real Time Tracking ◽  
Li Ion

Electrical Properties of Poly(Vinyl Alcohol) Complexed with Phosphoric Acid

1988 ◽  
Vol 135 ◽  
Author(s):  
Ke-Cheng Gong ◽  
Huang Shou-Cai
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Electrical Properties ◽  
Phosphoric Acid ◽  
Vinyl Alcohol ◽  
Impedance Measurement ◽  
Poly Vinyl Alcohol ◽  
Promising Candidate ◽  
Polarization Experiment

AbstractThe electrical properties of poly(vinyl alcohol) complexed with phosphoric acid have been studied. It is found that the conductivity increases with the concentration of the acid, and also increases with time if the sample is exposed to the air, which is interpreted in terms of glass transition temperature. A.C. impedance measurement and polarization experiment show that this proton-conducting polymer is a promising candidate for electrochromic display. It is also found that some plasticizers, such as glycerol and ethylene-glycol are effective for improving its conductivity.

Combined effect of relative humidity and temperature on dynamic viscoelastic properties and glass transition of poly(vinyl alcohol)

2013 ◽  
Vol 130 (5) ◽  
pp. 3161-3167 ◽  
Author(s):  
Hongjiu Hu ◽  
Xiaolong Zhang ◽  
Yaolong He ◽  
Zhan-sheng Guo ◽  
Junqian Zhang ◽  
...  
Keyword(s):  
Glass Transition ◽  
Relative Humidity ◽  
Vinyl Alcohol ◽  
Viscoelastic Properties ◽  
Combined Effect ◽  
Poly Vinyl Alcohol

scholarly journals Novel Semi-Interpenetrated Polymer Networks of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate)/Poly (Vinyl Alcohol) with Incorporated Conductive Polypyrrole Nanoparticles

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 57
Author(s):  
José Luis Aparicio-Collado ◽  
Juan José Novoa ◽  
José Molina-Mateo ◽  
Constantino Torregrosa-Cabanilles ◽  
Ángel Serrano-Aroca ◽  
...  
Keyword(s):  
Glass Transition ◽  
Vinyl Alcohol ◽  
Polymer Networks ◽  
Transition Process ◽  
Interpenetrating Polymer Networks ◽  
Strong Interactions ◽  
Poly Vinyl Alcohol ◽  
Low Concentrations ◽  
Hydrogel Matrix ◽  
Hydrogel Swelling

This paper reports the preparation and characterization of semi-interpenetrating polymer networks (semi-IPN) of poly(3-hydroxybutirate-co-3-hydroxyvalerate), PHBV, and poly (vinyl alcohol), PVA, with conductive polypirrole (PPy) nanoparticles. Stable hybrid semi-IPN (PHBV/PVA 30/70 ratio) hydrogels were produced by solvent casting, dissolving each polymer in chloroform and 1-methyl-2-pyrrolidone respectively, and subsequent glutaraldehyde crosslinking of the PVA chains. The microstructure and physical properties of this novel polymeric system were analysed, including thermal behaviour and degradation, water sorption, wettability and electrical conductivity. The conductivity of these advanced networks rose significantly at higher PPy nanoparticles content. Fourier transform infrared spectroscopy (FTIR) and calorimetry characterization indicated good miscibility and compatibility between all the constituents, with no phase separation and strong interactions between phases. A single glass transition was observed between those of pure PHBV and PVA, although PVA was dominant in its contribution to the glass transition process. Incorporating PPy nanoparticles significantly reduced the hydrogel swelling, even at low concentrations, indicating molecular interactions between the PPy nanoparticles and the hydrogel matrix. The PHBV/PVA semi-IPN showed higher thermal stability than the neat polymers and PHBV/PVA blend, which also remained in the tertiary systems.

Sum-Frequency Vibrational Spectroscopic Study of Surface Glass Transition of Poly(vinyl alcohol)

2003 ◽  
Vol 36 (9) ◽  
pp. 3303-3306 ◽  
Author(s):  
Chun Zhang ◽  
Seok-Cheol Hong ◽  
Na Ji ◽  
Yen-Po Wang ◽  
Kung-Hwa Wei ◽  
...  
Keyword(s):  
Glass Transition ◽  
Spectroscopic Study ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Sum Frequency ◽  
Surface Glass
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