Thermophysical and fire properties of vakka natural fiber reinforced polyester composites

2013 ◽  
Vol 32 (15) ◽  
pp. 1092-1098 ◽  
Author(s):  
K Ramanaiah ◽  
AV Ratna Prasad ◽  
K Hema Chandra Reddy
Keyword(s):  
Natural Fiber ◽  
Fiber Reinforced ◽  
Polyester Composites ◽  
Fire Properties

Validation of fatigue damage model for composites made of various fiber types and configurations

2017 ◽  
Vol 52 (9) ◽  
pp. 1183-1191 ◽  
Author(s):  
Asim Shahzad ◽  
Sana Ullah Nasir
Keyword(s):  
Composite Materials ◽  
Glass Fiber ◽  
Fatigue Damage ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Fiber Types ◽  
Fiber Reinforced ◽  
Hemp Fiber ◽  
Fatigue Data ◽  
Polyester Composites

Empirical model for predicting fatigue damage behavior of composite materials developed recently has been applied to composite materials made of different fibers in various configurations: carbon and glass fiber noncrimp fabric reinforced epoxy composites, chopped strand mat glass fiber-reinforced polyester composites, randomly oriented nonwoven hemp fiber-reinforced polyester composites, and glass/hemp fiber-reinforced polyester hybrid composites. The fatigue properties were evaluated in tension–tension mode at stress ratio R = 0.1 and frequency of 1 Hz. The experimental fatigue data were used to determine the material parameters required for the model. It has been found that the model accurately predicts the degradation of fatigue life of composites with an increase in number of fatigue cycles. The scope of applicability of this model has thus been broadened by using the fatigue data of natural fiber and noncrimp fabric composites.

scholarly journals The Effect of Alkali Treatment And Microcrystalline Cellulose Addition on Density Value of Cantala Fiber Reinforced Unsaturated Polyester Composites

2021 ◽  
Vol 20 (1) ◽  
pp. 1
Author(s):  
Muhammad Ghozali ◽  
Dody Ariawan ◽  
Eko Surojo
Keyword(s):  
Microcrystalline Cellulose ◽  
Natural Fiber ◽  
Volume Fraction ◽  
Treatment Time ◽  
Alkali Treatment ◽  
Unsaturated Polyester ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Molding Method ◽  
Polyester Composites

<p>Natural fiber reinforced composites is one materials potentially developing in Indonesia. One of biggest problem with composites specimen is its void. One properties to find out void of composites is composites density value. The objective of research is to investigate the effect of fiber alkali (NaOH) treatment and microcrystalline cellulose (MCC) addition on density value of cantala fiber reinforced unsaturated polyester composites. Firstly, cantala fibers was submerged into alkali (NaOH) 6% solution for 0, 3, 6, 9, and 12 hours. Furthermore, the fiber was washed using acetid acid and then using clean water to reach pH 7. Thereafter, cantala fiber was dried in the oven for 10 hours at temperature 60<sup>0</sup>C. Composites was composed of cantala fiber, unsaturated polyester polymer matrix, and microcrystalline cellulose according to the composition with volume fraction 30%. Composites was casted using compression molding method with compressive strength of 10 MPa for 12 hours. All specimens of composites undertake post cure for 2 hours at 60<sup>0</sup>C. Density test was conducted using densimeter by calculating the density of composites in the air and the water. The result of research showed that the longer the alkali treatment time and the more addition of microcrystalline cellulose (MCC) filler, the higher is the composites density. The higher density value of cantala fiber reinforced unsaturated polyester is alkali treatment 6 hours, which was 1.223 gr/cm<sup>3</sup>.</p>

Polylactic acid biocomposites: approaches to a completely green flame retarded polymer

e-Polymers ◽  
2017 ◽  
Vol 17 (6) ◽  
pp. 449-462 ◽  
Author(s):  
Fanni D. Sypaseuth ◽  
Emanuela Gallo ◽  
Serhat Çiftci ◽  
Bernhard Schartel
Keyword(s):  
Polylactic Acid ◽  
Flame Retardants ◽  
Natural Fiber ◽  
Synergistic Effects ◽  
Layered Silicate ◽  
Expandable Graphite ◽  
Fiber Reinforced ◽  
Flame Retarded ◽  
Fire Properties ◽  
Kenaf Fibers

AbstractBasic paths towards fully green flame retarded kenaf fiber reinforced polylactic acid (K-PLA) biocomposites are compared. Multicomponent flame retardant systems are investigated using an amount of 20 wt% such as Mg(OH)2 (MH), ammonium polyphosphate (APP) and expandable graphite (EG), and combinations with silicon dioxide or layered silicate (LS) nanofillers. Adding kenaf fibers and flame retardants increases the E modulus up to a factor 2, although no compatibilizer was used at all. Thus, in particular adding EG and MH decreases the strength at maximum elongation, and kenaf fibers, MH, and EG are crucial for reducing the elongation to break. The oxygen index is improved by up to 33 vol% compared to 17 vol% for K-PLA. The HB classification of K-PLA in the UL 94 test is outperformed. All flame retarded biocomposites show somewhat lower thermal stability and increased amounts of residue. MH decreases the fire load significantly, and the greatest reduction in peak heat release rate is obtained for K-PLA/15MH/5LS. Synergistic effects are observed between EG and APP (ratio 2:1) in flammability and fire properties. Synergistic multicomponent systems containing EG and APP, or MH with adjuvants offer a promising route to green flame retarded natural fiber reinforced PLA biocomposites.

Natural Fiber Reinforced Unsaturated Polyester Composites - An Approach On Compression Molding

2001 ◽  
Author(s):  
Nestor Pedro Giacomini ◽  
Jürgen Knothe ◽  
Octavio Pimenta Reis Neto ◽  
Alcides Lopes Leao
Keyword(s):  
Natural Fiber ◽  
Unsaturated Polyester ◽  
Compression Molding ◽  
Fiber Reinforced ◽  
Polyester Composites
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