Functionalized Clay Vinyl Ester Nanocomposites

2008 ◽  
Author(s):  
Dharmaraj Raghavan
Keyword(s):  
Vinyl Ester

Predicting the Viscosity of Low VOC Vinyl Ester and Fatty Acid-Based Resins

2005 ◽  
Author(s):  
John J. LaScala ◽  
Amutha Jeyarajasingam ◽  
Cherise Winston ◽  
James M. Sand ◽  
Guiseppe R. Palmese
Keyword(s):  
Fatty Acid ◽  
Vinyl Ester

scholarly journals Environmental effects on mode II fracture toughness of unidirectional E-glass/vinyl ester laminated composites

2021 ◽  
Vol 28 (1) ◽  
pp. 382-393
Author(s):  
Mazaher Salamt-Talab ◽  
Fatemeh Delzendehrooy ◽  
Alireza Akhavan-Safar ◽  
Mahdi Safari ◽  
Hossein Bahrami-Manesh ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Sulfuric Acid ◽  
Vinyl Ester ◽  
Cohesive Zone Model ◽  
Flexural Modulus ◽  
Mode Ii ◽  
Zone Model ◽  
Sharp Drop ◽  
Mode Ii Fracture ◽  
Mode Ii Fracture Toughness

Abstract In this article, mode II fracture toughness ( G IIc {G}_{\text{IIc}} ) of unidirectional E-glass/vinyl ester composites subjected to sulfuric acid aging is studied at two different temperatures (25 and 90°C). Specimens were manufactured using the hand lay-up method with the [ 0 ] 20 {{[}0]}_{20} stacking sequence. To study the effects of environmental conditions, samples were exposed to 30 wt% sulfuric acid at room temperature (25°C) for 0, 1, 2, 4, and 8 weeks. Some samples were also placed in the same solution but at 90°C and for 3, 6, 9, and 12 days to determine the interlaminar fracture toughness at different aging conditions. Fracture tests were conducted using end notched flexure (ENF) specimens according to ASTM D7905. The results obtained at 25°C showed that mode II fracture toughness increases for the first 2 weeks of aging and then it decreases for the last 8 weeks. It was also found that the flexural modulus changes with the same trend. Based on the results of the specimens aged at 90°C, a sharp drop in fracture toughness and flexural modulus with a significant decrease in maximum load have been observed due to the aging. Finite element simulations were performed using the cohesive zone model (CZM) to predict the global response of the tested beams.

Mechanical performance of vinyl ester—polyurethane interpenetrating polymer network composites

2021 ◽  
pp. 50411
Author(s):  
Nima Alizadeh ◽  
David P. Thorne ◽  
Maria L. Auad ◽  
Asha‐Dee N. Celestine
Keyword(s):  
Vinyl Ester ◽  
Mechanical Performance ◽  
Polymer Network ◽  
Interpenetrating Polymer Network

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.

scholarly journals Property Analysis of Carbon Fiber with Vinyl Ester Resin Type Sizing Agen

2013 ◽  
Vol 25 (14) ◽  
pp. 7955-7958 ◽  
Author(s):  
Wanwan Ding ◽  
Juan Chen ◽  
Jianye Liu ◽  
Zengkai Pang ◽  
Ruifang Guan
Keyword(s):  
Carbon Fiber ◽  
Vinyl Ester ◽  
Vinyl Ester Resin ◽  
Property Analysis

New Vinyl Ester Bio-copolymers Derived from Dimer Fatty Acids: Preparation, Characterization and Properties

2013 ◽  
Vol 90 (5) ◽  
pp. 695-706 ◽  
Author(s):  
Shouhai Li ◽  
Jianling Xia ◽  
Mei Li ◽  
Kun Huang
Keyword(s):  
Fatty Acids ◽  
Vinyl Ester ◽  
Dimer Fatty Acids
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