Effect of glass fiber sizing on the cure kinetics of vinyl–ester resins

1999 ◽  
Vol 30 (1) ◽  
pp. 11-18 ◽  
Author(s):  
G.R. Palmese ◽  
O.A. Andersen ◽  
V.M. Karbhari
Keyword(s):  
Glass Fiber ◽  
Vinyl Ester ◽  
Cure Kinetics ◽  
Kinetics Of ◽  
Vinyl Ester Resins

Photo-DSC cure kinetics of vinyl ester resins. I. Influence of temperature

Polymer ◽  
2002 ◽  
Vol 43 (22) ◽  
pp. 5839-5845 ◽  
Author(s):  
Timothy F. Scott ◽  
Wayne D. Cook ◽  
John S. Forsythe
Keyword(s):  
Vinyl Ester ◽  
Cure Kinetics ◽  
Influence Of Temperature ◽  
Kinetics Of ◽  
Vinyl Ester Resins

Photo-DSC cure kinetics of vinyl ester resins II: influence of diluent concentration

Polymer ◽  
2003 ◽  
Vol 44 (3) ◽  
pp. 671-680 ◽  
Author(s):  
Timothy F. Scott ◽  
Wayne D. Cook ◽  
John S. Forsythe
Keyword(s):  
Vinyl Ester ◽  
Cure Kinetics ◽  
Kinetics Of ◽  
Vinyl Ester Resins

Effects of additives on the cure kinetics of vinyl ester pultrusion resins

2021 ◽  
pp. 002199832110015
Author(s):  
Alexander Vedernikov ◽  
Yaroslav Nasonov ◽  
Roman Korotkov ◽  
Sergey Gusev ◽  
Iskander Akhatov ◽  
...  
Keyword(s):  
Vinyl Ester ◽  
Mean Squared Error ◽  
Cure Kinetics ◽  
Zinc Stearate ◽  
Heating Rates ◽  
Scanning Calorimetry ◽  
Different Temperatures ◽  
Predicted Values ◽  
Kinetics Of ◽  
Final Degree

Pultrusion is a highly efficient composite manufacturing process. To accurately describe pultrusion, an appropriate model of resin cure kinetics is required. In this study, we investigated cure kinetics modeling of a vinyl ester pultrusion resin (Atlac 430) in the presence of aluminum hydroxide (Al(OH)3) and zinc stearate (Zn(C18H35O2)2) as processing additives. Herein, four different resin compositions were studied: neat resin composition, composition with Al(OH)3, composition comprising Zn(C18H35O2)2, and composition containing both Al(OH)3 and Zn(C18H35O2)2. To analyze each composition, we performed differential scanning calorimetry at the heating rates of 5, 7.5, and 10 K/min. To characterize the cure kinetics of Atlac 430, 16 kinetic models were tested, and their performances were compared. The model based on the [Formula: see text]th-order autocatalytic reaction demonstrated the best results, with a 4.5% mean squared error (MSE) between the experimental and predicted data. This study proposes a method to reduce the MSE resulting from the simultaneous melting of Zn(C18H35O2)2. We were able to reduce the MSE by approximately 34%. Numerical simulations conducted at different temperatures and pulling speeds demonstrated a significant influence of resin composition on the pultrusion of a flat laminate profile. Simulation results obtained for the 600 mm long die block at different die temperatures (115, 120, 125, and 130 °C) showed that for a resin with a final degree of cure exceeding 95% at the die exit, the maximum difference between the predicted values of pulling speed for a specified set of compositions may exceed 1.7 times.

Nonlinear and complex cure kinetics of ultra-thin glass fiber epoxy prepreg with highly-loaded silica bead under isothermal and dynamic-heating conditions

2016 ◽  
Vol 644 ◽  
pp. 28-32 ◽  
Author(s):  
Ye Chan Kim ◽  
Hyunsung Min ◽  
Jeongsu Yu ◽  
Jonghwan Suhr ◽  
Young Kwan Lee ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Cure Kinetics ◽  
Thin Glass ◽  
Silica Bead ◽  
Kinetics Of ◽  
Dynamic Heating ◽  
Highly Loaded

scholarly journals The Curing Kinetics of Multiscale [Ni(EDTA)]-2 Intercalated Zn-Al Layered Double Hydroxides: Glass Fiber–Epoxy Composite Prepreg

2021 ◽  
Vol 2021 ◽  
pp. 1-22
Author(s):  
Reza Darvishi ◽  
Mahdi Darvishi ◽  
Ali Moshkriz
Keyword(s):  
Glass Fiber ◽  
Layered Double Hydroxides ◽  
Cure Kinetics ◽  
Curing Kinetics ◽  
Scanning Calorimetry ◽  
Curing Behavior ◽  
Autocatalytic Model ◽  
Experimental Findings ◽  
Double Hydroxides ◽  
Kinetics Of

In the present research, the effect of Zn2Al layered double hydroxides (LDH) and nickel (II)-EDTA complex intercalated LDH (LDH-[Ni(EDTA)]-2) on the cure kinetics of glass fiber/epoxy prepreg (GEP) was explored using nonisothermal differential scanning calorimetry (DSC). The results showed that LDH caused a shift in the cure temperature toward lower temperatures while accelerating the curing of epoxy prepregs. The use of LDH-[Ni(EDTA)]-2 more profoundly influenced the acceleration of the curing process. The curing kinetics of prepregs was assessed through the differential isoconversional Friedman (FR) technique and the integration method of Flynn–Wall–Ozawa (FWO) and Kissinger–Akahira–Sunose (KAS). A decrease was detected in the E α value of glass fiber/LDH-[Ni(EDTA)]-2/epoxy (GELP) and glass fiber/LDH-[Ni(EDTA)]-2/epoxy (GELNiP) prepregs at small cure degrees relative to GEP, suggesting the catalytic effect of LDH or LDH-[Ni(EDTA)]-2 on the initial epoxy/amine reaction. Furthermore, LDH-[Ni(EDTA)]-2 performed better due to the catalyst role of nickel (II). Moreover, the activation energy exhibited lower reliance on the degree of conversion in the cases of GELP and GELNiP rather than pure epoxy prepregs. An autocatalytic model was used to evaluate the curing behavior of the system. Based on the results, the curing reaction of the epoxy prepreg can be described by the autocatalytic Šesták-Berggren model even after the incorporation of LDH or LDH-[Ni(EDTA)]-2. The kinetic parameters of the autocatalytic model (such as E α , A , m , n ) and the equations explaining the curing behavior of prepregs were introduced as well whose predictions were in line with the experimental findings.

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