PSI - Issue 40

S.N. Danilova et al. / Procedia Structural Integrity 40 (2022) 118–123 S.N. Danilova, A.A. Dyakonov, A.P. Vasilev, A.A. Okhlopkova / Structural Integrity Procedia 00 (2022) 000 – 000

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been changed within the entire concentration range of filling 0.5, 1 and 2 wt.%. In this case, the values of the ultimate strength of the composites are 14% higher relative to unfilled UHMWPE. In addition, mechanical co activation results in increasing the value of elastic modulus. When UHMWPE is filled with 1 wt.% BF, which was preliminarily mechanically activated for 20 minutes, there occurs an increase by 19% of the elastic modulus value.

Table 1. Mechanical Properties of UHMWPE and PCM.

Sample

Tensile strength σ rm , MPa

Elongation at break ε rr , %

Elastic modulus E r , MPa

UHMWPE

34 ± 1 35 ± 2 36 ± 3 39 ± 1

372 ± 17 388 ± 30 387 ± 18 362 ± 12 341 ± 14 356 ± 10 332 ± 12 340 ± 20 323 ± 12 324 ± 17

600 ± 25 529 ± 20 578 ± 31 643 ± 22 701 ± 22 696 ± 16 687 ± 19 705 ± 34 717 ± 26 689 ± 23

UHMWPE/0.5 wt.% BF UHMWPE/1 wt.% BF UHMWPE/2 wt.% BF

Mechanically Co-activated Composites UHMWPE/BF UHMWPE/0.5 wt.% BF for 2 minutes 37 ± 2

UHMWPE/1 wt.% BF for 2 minutes UHMWPE/2 wt.% BF for 2 minutes UHMWPE/0.5 wt.% BF for 20 minutes UHMWPE/1 wt.% BF for 20 minutes UHMWPE/2 wt.% BF for 20 minutes

36 ± 1 36 ± 1 39 ± 3 38 ± 2 39 ± 2

Fig. 1. Microphotographs of the composites containing 2 wt.% BF (magnification х300): a – initial UHMWPE; b – BF; c – co-activation with BF for 2 minutes; d – co-activation with BF for 20 minutes.