A facile synthetic route to poly(p-phenylene terephthalamide) with dual functional groups

2014 ◽  
Vol 50 (69) ◽  
pp. 9929-9931 ◽  
Author(s):  
Shuming Du ◽  
Wenbin Wang ◽  
Yan Yan ◽  
Jie Zhang ◽  
Ming Tian ◽  
...  
Keyword(s):  
Interfacial Adhesion ◽  
Claisen Rearrangement ◽  
Interface Structure ◽  
Fiber Reinforced Composites ◽  
Hydroxyl Groups ◽  
Reinforced Composites ◽  
Synthetic Route ◽  
Kevlar Fiber ◽  
Dual Functional ◽  
Rearrangement Reaction

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.

Sulfone-functionalized poly(p-phenylene terephthalamide) copolymer fibers with improved interfacial adhesion to epoxy matrices

2021 ◽  
pp. 095400832110089
Author(s):  
Ting Li ◽  
Zengxiao Wang ◽  
Hao Zhang ◽  
Yutong Cao ◽  
Zuming Hu ◽  
...  
Keyword(s):  
Interfacial Adhesion ◽  
Interfacial Shear Strength ◽  
Aramid Fiber ◽  
Fiber Reinforced Composites ◽  
Epoxy Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Regular Arrangement ◽  
Epoxy Matrices ◽  
Polymerization Conditions

The poor interfacial adhesion of aramid fiber and matrix limits the application of the final composites. In this study, a series of the sulfone-functionalized poly( p-phenylene terephthalamide) (SPPTA) copolymers were satisfactorily synthesized and the effects of polymerization conditions (contents of the additional monomer and the cosolvent LiCl, molar concentration and ratio of the monomer, reaction temperature and time) on the molecular weight of the copolymer were discussed. The introduction of the sulfone group in aromatic polyamides not only increased the polarity of poly( p-phenylene terephthalamide) (PPTA) but destroyed the regular arrangement of the molecular chains, which greatly improved the surface free energy and the solubility of the polymers in organic solvents. The polymer maintained excellent thermal and interfacial properties. Compared with the PPTA fiber/epoxy composites, the interfacial shear strength (IFSS) of SPPTA fiber-reinforced epoxy composites reached 43.5 MPa, with a significantly enhancement of 20.8%, implying that the study provided an effective method to achieve highly interfacial adhesion of aramid fiber-reinforced composites.

A Critical Evaluation of the Use of the Microbond Method for Determination of Composite Interfacial Properties

1989 ◽  
Vol 170 ◽  
Author(s):  
Rebecca A. Haaksma ◽  
Marilyn J. Cehelnik
Keyword(s):  
Interfacial Adhesion ◽  
Test Procedure ◽  
Critical Evaluation ◽  
Adhesive Bond ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Microbond Test ◽  
Application Techniques ◽  
Matrix Heterogeneity

AbstractThe microbond method has been applied with increased frequency to characterize interfacial adhesion in fiber reinforced composites. Nevertheless, a number of serious questions remain regarding the interpretation of experimental data. This paper addresses material and experimental variables in the microbond test procedure including the cure behavior of thermoset test specimens, matrix heterogeneity, locus of failure in test specimens and load application techniques. The theoretical basis for the method is examined by viewing experimental results in terms of existing theoretical interpretations of interfacial failure. Conclusions are presented regarding the limitations and the potential of the microbond method for determining fiber/matrix adhesive bond strength.

scholarly journals Dual-functional natural-fiber reinforced composites by incorporating magnetite

2016 ◽  
Vol 93 ◽  
pp. 221-228 ◽  
Author(s):  
Changlei Xia ◽  
Kaili Wang ◽  
Youming Dong ◽  
Shifeng Zhang ◽  
Sheldon Q. Shi ◽  
...  
Keyword(s):  
Natural Fiber ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Dual Functional

scholarly journals Designing and Preparation of Fiber-Reinforced Composites with Enhanced Interface Adhesion

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1128 ◽  
Author(s):  
Dengxun Ren ◽  
Lin Chen ◽  
Yue Yuan ◽  
Kui Li ◽  
Mingzhen Xu ◽  
...  
Keyword(s):  
Composite Laminates ◽  
Interfacial Adhesion ◽  
Polymer Networks ◽  
Great Influence ◽  
Interpenetrating Polymer Networks ◽  
Fiber Reinforced Composites ◽  
Resin Matrix ◽  
Differential Scanning Calorimetric ◽  
Reinforced Composites ◽  
Fiber Reinforced

The interfacial properties between fibers and resin matrices show great influence on the properties of fiber-reinforced composites. In this work, phthalonitrile containing benzoxazine (BA-ph) was chosen as the resin matrix, which combined with the glass fiber (GF) to prepare reinforced composite laminates at low temperature (200 °C). The poly(arylene ether nitrile) (PEN) was used to modify the GF and BA-ph matrix. Curing behaviors of the BA-ph/PEN were investigated with Differential scanning calorimetric (DSC) and Dynamic rheological analysis (DRA), and results indicated that the polymerization would be hindered by PEN due to the dilution effects. Moreover, the formation of triazine rings which assigning to the ring-forming polymerization of nitrile groups in BA-ph and PEN could improve the compatibility of BA-ph and PEN in the matrix. The SEM images of the fracture surface of the composites revealed that the brittleness of BA-ph matrix and interfacial adhesion between GFs and matrix was improved. The enhanced interfacial adhesion was detailedly discussed from the perspective of physical entanglement and the copolymerization between PEN chains on the surface of GFs and BA-ph/PEN matrix. The results of DMA also explained the toughness of BA-ph/PEN matrix, the semi-interpenetrating polymer networks and the interfacial adhesion. In sum, a feasible strategy that modifies the surface of GFs and the brittleness of the thermosetting matrix by high-performance thermoplastic polymers, which can be employed to prepare the composite laminates with improved properties.

Interfacial adhesion study on UHMWPE fiber-reinforced composites

2011 ◽  
Vol 67 (3) ◽  
pp. 527-540 ◽  
Author(s):  
Xiaokang Zhang ◽  
Yaoxian Wang ◽  
Chong Lu ◽  
Shujun Cheng
Keyword(s):  
Interfacial Adhesion ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Uhmwpe Fiber
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