Constituent
Name
Polyethylene HDPE
Family
molecular solid
Class
non polar molecular solid
Compound type
homopolymer
Comments
The polymer has up to 7 500 000 monomers units and different branching degrees. It is classified according to its density and branching: very-low-density polyethylene (VLDPE), low-density polyethylene (LDPE), Linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), Cross-linked polyethylene (PEX or XLPE), High-density cross-linked polyethylene (HDXLPE), high-density polyethylene (HDPE), Ultra-low-molecular-weight polyethylene (ULMWPE or PE-WAX), High-molecular-weight polyethylene (HMWPE), and ultra-high-molecular-weight polyethylene (UHMWPE)
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0
Mole fraction
1.0
Terminal function
$CH_3$
Monomer number
n, up to 7500000
Molar mass
28.053 per mer unit $g/mol$
Polymolecularity index
1
Formula
$CH_3-(CH_2-CH_2)_n-CH_3$
Chemical formula
(C2H4)n(CH3)2
Elemental formula
C2 H4
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$\bullet[C_2H_4]\bullet$ Ethylene mer molecule 1 - n 1 constituent mer main
$C$ Carbon element 2 1 constituent element main
$H$ Hydrogen element 6 1 constituent element main
Composition comments
The formula is n repeting units + 2 $-CH_3$ terminal functions
Chemical functions
  Function Number
$R-CH_2-R$ 2
Chemical bonds
  Bond Number
$\geq C-C\leq$ n
$\geq C-H$ 6
$\geq C-C\leq$ 1
$\geq C-H$ 4
Class
molecular solids with apolar molecules (01)
Type
with polyatomic organic apolar molecules (CnHm...) (01.06)
Phase name
HDPE
Phase type
various
Polytype
High-density polyethylene (HDPE) (HDPE has a low degree of branching and is defined by a density of greater or equal to 0.941 g/cm3.)
Texture
other
Molar mass
28.053 $g/mol$
Density
0.94 - 0.96 $g/cm^3$
Refringence type
unknown
Diaphaneity
transparent to translucent
Luster
vitreous