Improvement of the Interfacial Adhesion Between Kevlar Fiber and Resin by Using R-F Plasma

1996 ◽  
Vol 18 (4) ◽  
pp. 249 ◽  
Author(s):  
WS Johnson ◽  
JE Masters ◽  
DW Wilson ◽  
M Shaker ◽  
I Kamel ◽  
...  
2014 ◽  
Vol 50 (69) ◽  
pp. 9929-9931 ◽  
Author(s):  
Shuming Du ◽  
Wenbin Wang ◽  
Yan Yan ◽  
Jie Zhang ◽  
Ming Tian ◽  
...  

Claisen rearrangement reaction introduces simultaneously allyl and hydroxyl groups to PPTA chains, and improves the interface structure and interfacial adhesion of Kevlar fiber reinforced composites.


2021 ◽  
pp. 103406
Author(s):  
Mohammad Asaduzzaman Chowdhury ◽  
Nayem Hossain ◽  
Md. Bengir Ahmed Shuvho ◽  
Md. Arefin Kowser ◽  
Md. Akibul Islam ◽  
...  

Author(s):  
S.D. Smith ◽  
R.J. Spontak ◽  
D.H. Melik ◽  
S.M. Buehler ◽  
K.M. Kerr ◽  
...  

When blended together, homopolymers A and B will normally macrophase-separate into relatively large (≫1 μm) A-rich and B-rich phases, between which exists poor interfacial adhesion, due to a low entropy of mixing. The size scale of phase separation in such a blend can be reduced, and the extent of interfacial A-B contact and entanglement enhanced, via addition of an emulsifying agent such as an AB diblock copolymer. Diblock copolymers consist of a long sequence of A monomers covalently bonded to a long sequence of B monomers. These materials are surface-active and decrease interfacial tension between immiscible phases much in the same way as do small-molecule surfactants. Previous studies have clearly demonstrated the utility of block copolymers in compatibilizing homopolymer blends and enhancing blend properties such as fracture toughness. It is now recognized that optimization of emulsified ternary blends relies upon design considerations such as sufficient block penetration into a macrophase (to avoid block slip) and prevention of a copolymer multilayer at the A-B interface (to avoid intralayer failure).


1993 ◽  
Vol 2 (5) ◽  
pp. 096369359300200 ◽  
Author(s):  
H.D. Wagner ◽  
S. Ling

An energy balance approach is proposed for the single fibre composite (or fragmentation) test, by which the degree of fibre-matrix bonding is quantified by means of the interfacial energy, rather than the interfacial shear strength, as a function of the fibre geometrical and mechanical characteristics, the stress transfer length, and the debonding length. The validity of the approach is discussed using E-glass fibres embedded in epoxy, both in the dry state and in the presence of hot distilled water.


2019 ◽  
pp. 089270571987822
Author(s):  
Saud Aldajah ◽  
Mohammad Y Al-Haik ◽  
Waseem Siddique ◽  
Mohammad M Kabir ◽  
Yousef Haik

This study reveals the enhancement of mechanical and thermal properties of maleic anhydride-grafted polypropylene (PP- g-MA) with the addition of nanocrystalline cellulose (NCC). A nanocomposite was manufactured by blending various percentages of PP, MA, and NCC nanoparticles by means of a twin-screw extruder. The influence of varying the percentages of NCC on the mechanical and thermal behavior of the nanocomposite was studied by performing three-point bending, nanoindentation, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Fourier-transform infrared (FTIR) spectroscopy tests. The novelty of this study stems on the NCC nanoparticles and their ability to enhance the mechanical and thermal properties of PP. Three-point bending and nanoindentation tests revealed improvement in the mechanical properties in terms of strength, modulus, and hardness of the PP- g-MA nanocomposites as the addition of NCC increased. SEM showed homogeneity between the mixtures which proved the presence of interfacial adhesion between the PP- g-MA incorporated with NCC nanoparticles that was confirmed by the FTIR results. DSC and TGA measurements showed that the thermal stability of the nanocomposites was not compromised due to the addition of the coupling agent and reinforced nanoparticles.


Carbon ◽  
2019 ◽  
Vol 152 ◽  
pp. 631-642 ◽  
Author(s):  
Sushant Sharma ◽  
S.R. Dhakate ◽  
Abhijit Majumdar ◽  
Bhanu Pratap Singh

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