Thermal and Morphological Influence on the B{sub}(1u) Lattice Mode in Polyethylene observed using Terahertz Time-Domain Spectroscopy

摘要

Decreasing the temperature leads to a blue shift of the B{sub}(1u) lattice mode in different types of polyethylene, which can be observed using terahertz time-domain spectroscopy. Moreover, the frequency shift reveals the glass transition of high-density polyethylene due to the semi-crystalline nature in this polymer. In addition, morphological factors on the B{sub}(1u) lattice mode of LDPE, LLDPE, and HDPE are discussed.