Optical constants of (C10H8O4)n (Polyethylene terephthalate, PET)
Zhang et al. 2020: n,k 0.4–20 µm
Complex refractive index (n+ik)
Derived optical constants
Comments
Normal temperature and pressure. Manufacturer: Chenghang plastic material, China.
References
1) X. Zhang, J. Qiu, X. Li, J. Zhao, L. Liu.
Complex refractive indices measurements of polymers in visible and near-infrared bands.
Appl. Opt. 59, 2337-2344 (2020)
(0.4-2 µm)
2) X. Zhang, J. Qiu, J. Zhao, X. Li, L. Liu.
Complex refractive indices measurements of polymers in infrared bands.
J. Quant. Spectrosc. Radiat. Transf. 252, 107063 (2020)
(2-20 µm)
Data
Additional information
About Polyethylene
Polyethylene (PE, HDPE, LDPE, (C2H4)n) is the most abundantly produced plastic globally, known for its versatile nature and wide array of applications. Chemically composed of repeating ethylene units, polyethylene exists in various densities and molecular weights that result in different material properties. High-density polyethylene (HDPE) is renowned for its rigidity, strength, and impermeability, making it a popular choice for items like bottles, pipes, and containers. On the other hand, low-density polyethylene (LDPE) offers more flexibility and is frequently used in packaging films, plastic bags, and other applications that demand malleability. Optically, polyethylene is generally translucent to opaque, depending on its density and thickness. Its refractive characteristics can be affected by the density, molecular alignment, and crystallinity of the material. In both its high and low-density forms, polyethylene is celebrated for its chemical resistance, low cost, and easy processing, factors that collectively contribute to its ubiquity in the modern world. Variations:
- High-density polyethylene (HDPE)
- Medium-density polyethylene (MDPE)
- Low-density polyethylene (LDPE)
- Linear low-density polyethylene (LLDPE)
- Cross-linked polyethylene (XLPE/PEX)
- Ultra-high-molecular-weight polyethylene (UHMWPE)
- C2H4)n
- PE
- HDPE
- LDPE
- polyethene
- poly(methylene)