Poly(vinyl Chloride) Melt Rheology and Flow Activation Energy

1967 ◽  
Vol 11 (2) ◽  
pp. 225-242 ◽  
Author(s):  
Edward A. Collins ◽  
Charles A. Krier
Keyword(s):  
Activation Energy ◽  
Vinyl Chloride ◽  
Melt Rheology ◽  
Flow Activation Energy ◽  
Chloride Melt ◽  
Poly Vinyl Chloride ◽  
Flow Activation

Rheological Study on of PBT with High Melt Flow Index

2012 ◽  
Vol 487 ◽  
pp. 644-648
Author(s):  
Yuan Liu ◽  
Lin Wang ◽  
Qing Yan Xu ◽  
Pei Jie Lin ◽  
Zhi Hong Guo ◽  
...  
Keyword(s):  
Activation Energy ◽  
Shear Rate ◽  
Apparent Viscosity ◽  
Melt Flow Index ◽  
Flow Index ◽  
Melt Flow ◽  
Flow Activation Energy ◽  
Nonwoven Fabrics ◽  
Flow Activation ◽  
High Flexibility

Melt-blown generated PBT nonwoven fabrics usually have small fibril diameter, high flexibility, well heat and oil resistance. Therefore, they would have promising application such as vehicle filtering media. The rheological behavior of PBT with High Melt Flow Index for Melt-blown is investigated in this paper. It is a direction of the technology design and fabrication parameters .The relation of apparent viscosity and shear rate is analyzed, as well as flow activation energy and Non-Newtonian indexes. The results suggest that PBT with High Melt Flow Index is Non-Newtonian fluid. Apparent viscosity and flow activation energy show gradually decrease with increasing shear rate, exhibiting typical shear-thinning behavior.

Rheological Behaviors of Graphene Oxide/Polyacrylonitrile Spinning Solutions

2017 ◽  
Vol 898 ◽  
pp. 2187-2196 ◽  
Author(s):  
Feng Mei Li ◽  
Ying Ying Zheng ◽  
Biao Wang
Keyword(s):  
Activation Energy ◽  
Graphene Oxide ◽  
Loss Factor ◽  
Viscosity Index ◽  
Structural Viscosity ◽  
Mechanical Loss ◽  
Flow Activation Energy ◽  
Rheological Behaviors ◽  
Flow Activation ◽  
Mechanical Loss Factor

The rheological behaviors of polyacrylonitrile (PAN) in NaSCN aqueous solutions containing different amount of Graphene oxide (GO) were investigated through both steady-state and dynamic rheological measurements. The parameters such as apparent viscosity (ηα), flow activation energy (Eη), structural viscosity index (Δη), storage modulus (G’), loss modulus (G’’) and mechanical loss factor (tanδ) were measured to illustrate the rheological behaviors of these solutions. The results showed that the apparent viscosity decreased with adding appropriate amount of GO, while the structural viscosity index, the flow activation energy and the mechanical loss factor of GO/PAN spinning solutions increased. Accordingly, a possible mechanism of GO effect on rheological behaviors of PAN solution was proposed in this work.

Enhanced thermal properties of graphene-based poly (vinyl chloride) composites

2018 ◽  
Vol 48 (8) ◽  
pp. 1348-1363 ◽  
Author(s):  
Yaqian xiao ◽  
Binjie Xin ◽  
Zhuoming Chen ◽  
Lantian Lin ◽  
Yan Liu ◽  
...  
Keyword(s):  
Activation Energy ◽  
Thermal Properties ◽  
Vinyl Chloride ◽  
Thermal Stabilities ◽  
Graphene Composite ◽  
Poly Vinyl Chloride ◽  
Coating Methods ◽  
Promising Application ◽  
Isothermal Kinetic ◽  
Thermal Stability Of

Poly (vinyl chloride)/graphene composites with different graphene concentrations were prepared by wet spinning and spin-coating methods. The thermal properties of the poly (vinyl chloride)/graphene composites are investigated through the analysis of the activation energy by using Kissinger and Friedman-Reich-Levi methods. The activation energy of poly (vinyl chloride)/graphene composites obtained by the two methods is consistent and it can be estimated from the non-isothermal kinetic results. In addition, the activation energy value of poly (vinyl chloride)/graphene composites is higher than that of the pure poly (vinyl chloride) fiber, indicating that the addition of graphene can significantly improve the thermal stability of poly (vinyl chloride). Moreover, the activation energy values of 9 wt% poly (vinyl chloride)/graphene composite obtained by Kissinger and Friedman-Reich-Levi methods are highest at 114.90 kJ/mol and 145.00 kJ/mol, respectively, and the result reveals that poly (vinyl chloride)/graphene composite with 9 wt% concentration of graphene has the best thermal stabilities. The prepared graphene-based poly (vinyl chloride) composites with good thermal properties have a promising application in the thermal protective materials.

The influence of temperature of poly(vinyl chloride) melt on the equilibrium state of gelation process

Polimery ◽  
2010 ◽  
Vol 55 (02) ◽  
pp. 106-110 ◽  
Author(s):  
KAZIMIERZ PISZCZEK ◽  
JOLANTA TOMASZEWSKA ◽  
TOMASZ STERZYNSKI
Keyword(s):  
Equilibrium State ◽  
Vinyl Chloride ◽  
Influence Of Temperature ◽  
Gelation Process ◽  
Chloride Melt ◽  
Poly Vinyl Chloride
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