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Оценка прочности адгезионной связи волокно — термопластичная матрица…

9

Evaluating fiber-thermoplastic matrix adhesive bond

strength using “loop” method

© S.V. Kotomin

1,2

1

Bauman Moscow State Technical University, Moscow, 105005, Russia

2

FSFS Institute of Petrochemical Synthesis RAS, Moscow, 119049, Russia

The fiber-matrix adhesion bond strength is an important feature in the development of

high-strength reinforced plastics. Evaluation of the adhesion of the reinforcing fibers,

such as aramid ones, to thermoplastic matrix using existing techniques involve high com-

plexity sample preparation, and in addition, require additional tools for testing. The arti-

cle discusses the method of determining the fiber-matrix adhesive bond strength based on

using an adhesion cell in the form of a node of the loop on microplastic obtained by im-

pregnating multifilament thread or bungle of threads with thermoplastic melt. In the pro-

cess of preparing samples the possibility of pressure adjustment in the area of adhesive

contact between fiber surface and matrix melt is realized.

Tests are carried out on a

standard tensile testing machine without additional equipment, which is important for

use in laboratories and educational institutions. The extreme dependence of fiber-

thermoplastic matrix adhesive bond strength on the contact time and the temperature of

the melt are shown by the example of Kevlar aramid thread and polysulfone.

Keywords:

thermoplastics, reinforced plastics, adhesion, aramid fibers.

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