Poly(oxymethylene-oxytetramethylene)

POLYMER CLASS	Polyglycol
COMMON NAMES	Poly(methylene oxide-co-tetramethylene oxide)
STRUCTURE BASED NAME	Poly(oxymethylene-oxytetramethylene)
ACRONYMS
CAS #
CurlySMILES	C{-}CCCOCO(n+}

PROPERTY	UNIT	VALUE / RANGE	PREFERRED
Molar Volume V_m	mL mol^-1	97.2¹
Density ρ	g mL^-1	1.05¹
Solubility Parameter δ	MPa^1/2	18.4¹
Molar Cohesive Energy E_coh	J mol^-1	33000¹
Glass Transition Temperature T_g	K	189
Molar Heat Capacity C_p	J (mol K)^-1	194.3
Entanglement Molecular Weight M_e	g mol^-1
Index of Refraction n	none	1.48¹

PROPERTY	UNIT	VALUE / RANGE	PREFERRED
Molecular Weight of Repeat unit	g mol^-1	102.13
Van-der-Waals Volume V_vW	mL mol^-1	97.2
Molar Volume V_m	mL mol^-1	90.7 - 101.9	95.8
Density ρ	g mL^-1	1.00 - 1.13	1.07
Solubility Parameter δ	MPa^1/2	18.3 - 20.0	19.0
Molar Cohesive Energy E_coh	J mol^-1	33600 - 36300	34600
Glass Transition Temperature T_g	K	185 - 210	198
Molar Heat Capacity C_p	J (mol K)^-1	214 - 223	218
Entanglement Molecular Weight M_e	g mol^-1
Index of Refraction n	none	1.46 - 1.47	1.47

¹Average of POM and PEG
Last updated: August 3, 2016