A report on Polymer and Material

Appearance of real linear polymer chains as recorded using an atomic force microscope on a surface, under liquid medium. Chain contour length for this polymer is ~204 nm; thickness is ~0.4 nm.

Cartoon schematic of polymer molecules

Structure of a styrene-butadiene chain, from a molecular simulation.

Some memorable milestones in the history of polymers

Microstructure of part of a DNA double helix biopolymer

Branch point in a polymer

A polyethylene sample that has necked under tension.

Thermal transitions in (A) amorphous and (B) semicrystalline polymers, represented as traces from differential scanning calorimetry. As the temperature increases, both amorphous and semicrystalline polymers go through the glass transition (Tg). Amorphous polymers (A) do not exhibit other phase transitions, though semicrystalline polymers (B) undergo crystallization and melting (at temperatures Tc and Tm, respectively).

Phase diagram of the typical mixing behavior of weakly interacting polymer solutions, showing spinodal curves and binodal coexistence curves.

A plastic item with thirty years of exposure to heat and cold, brake fluid, and sunlight. Notice the discoloration, swelling, and crazing of the material

Chlorine attack of acetal resin plumbing joint

Ozone-induced cracking in natural rubber tubing

is a substance or material consisting of very large molecules called macromolecules, composed of many repeating subunits.

- Polymer

Polymers: materials based on long carbon or silicon chains

- Material

Appearance of real linear polymer chains as recorded using an atomic force microscope on a surface, under liquid medium. Chain contour length for this polymer is ~204 nm; thickness is ~0.4 nm.

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