DOI: 10.1063/1.328526. A theory crack healing in polymers

10.1063/1.328526

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

A theory of crack healing in polymers is presented in terms of the stages of crack healing, namely, (a) surface rearrangement, (b) surface approach, (c) wetting, (d) diffusion, and (e) randomization. The recovery ratio R of mechanical properties with time was determined as a convolution product, R = Rh (t)*φ(t), where Rh (t) is an intrinsic healing function, and φ(t) is a wetting distribution function for the crack interface or plane in the material. The reptation model of a chain in a tube was used to describe self-diffusion of interpenetrating random coil chains which formed a basis for Rh (t). Applications of the theory are described, including crack healing in amorphous polymers and melt processing of polymer resins by injection or compression molding. Relations are developed for fracture stress σ, strain ε, and energy E as a function of time t, temperature T, pressure P, and molecular weight M. Results include (i) during healing or processing at t&lt;t∞, σ,ε∼t1/4, E∼t1/2; (ii) at constant t&lt;t∞, σ,ε∼M−1/4, E∼M−1/2; (iii) in the fully interpenetrated healed state at t = t∞, σ,ε∼M1/2, E∼M; (iv) the time to achieve complete healing, t∞ ∼M3, ∼exp P, ∼exp 1/T. Chain fracture, creep, and stress relaxation are also discussed. New concepts for strength predictions are introduced.

Bibliography

Wool, R. P., & OâConnor, K. M. (1981). A theory crack healing in polymers. Journal of Applied Physics, 52(10), 5953â5963.

Authors 2

R. P. Wool (first)
K. M. O’Connor (additional)

References 33 Referenced 890

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{'key': '2024020500090598500_r2', 'first-page': '271', 'volume': '40', 'year': '1979', 'journal-title': 'ACS Org. Coat. Plast. Chem.'} / ACS Org. Coat. Plast. Chem. (1979)
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Dates

Type	When
Created	22 years, 6 months ago (Feb. 14, 2003, 5:56 p.m.)
Deposited	1 year, 6 months ago (Feb. 4, 2024, 7:09 p.m.)
Indexed	28 minutes ago (Sept. 2, 2025, 8:32 p.m.)
Issued	43 years, 11 months ago (Oct. 1, 1981)
Published	43 years, 11 months ago (Oct. 1, 1981)
Published Print	43 years, 11 months ago (Oct. 1, 1981)

Funders 0

None

BibTeX

@article{Wool_1981, title={A theory crack healing in polymers}, volume={52}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.328526}, DOI={10.1063/1.328526}, number={10}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Wool, R. P. and O’Connor, K. M.}, year={1981}, month=oct, pages={5953–5963} }

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