Open AccessCover Image, Volume 55, Issue 2
Publication year - 2017
Publication title -
journal of polymer science part b: polymer physics
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.65
H-Index - 145
eISSN - 1099-0488
pISSN - 0887-6266
DOI - 10.1002/polb.24278
Subject(s) - low density polyethylene , high density polyethylene , cover (algebra) , polyethylene , scanning electron microscope , materials science , melting temperature , crystallite , volume (thermodynamics) , microstructure , polymer , polymer chemistry , physics , polymer science , composite material , thermodynamics , mechanical engineering , engineering , metallurgy
Scanning electron microscopy (SEM) image of a blend comprising low‐density and highdensity polyethylene (LDPE and HDPE). On page 146 (DOI: 10.1002/polb.24262 ), Christian Müller and colleagues explain how the addition of as little as 1 wt% HDPE leads to complete form stability above the melting temperature of LDPE. The investigated polyethylene blend is found to be miscible in the melt, which facilitates the formation of a solid‐state microstructure that features a fine distribution of HDPE‐rich lamellae. The absence of creep above the melting temperature of LDPE is rationalized with the presence of tie chains and trapped entanglements that connect the few remaining crystallites.