Stress-Strain Behavior of Some Acrylic Gradient Polymers.
Abstract
Multicomponent polymers whose structure or composition varies as a function of position in the sample are called gradient polymers. One way to prepare gradient polymers is to permit a guest monomer to diffuse into a host polymer network. The resulting profile of the diffusion gradient is fixed by polymerizing the monomer in situ. In this work, we used 2-chloroethyl acrylate as the monomer and poly(methyl methacrylate) as the polymer matrix. Both gradient polymers and interpenetrating networks were prepared. It was found that the stress-strain behavior of gradient polymers is quite different from that of the interpenetrating networks of comparable composition. The former shows a yield point, and considerably enhanced fracture strain. The latter is essentially rubber in character. Possible mechanisms for the unique properties of gradient polymers are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 10, 1978
- Accession Number
- ADA052617
Entities
People
- C. F. Jasso
- Meikun Shen
- S. D. Hong
Organizations
- University of California, Berkeley