聚四氢呋喃醚PTMEG1000

ptmeg

1000

1800

2000

3000

appearance

a white waxy solid, and may become transparent liquid over a room temperature

average molecular weight

1000

1800

2000

3000

hydroxyl number

112

62

56

37

viscosity(cps,40℃)

310

1240

1445

4300

specific gravity(40/4℃)

0.975

0.974

0.974

0.97

refractive index

1.463

1.464

1.464

1.464

melting point(tm, ℃)

24

28

32

35

glass transition point(tg, ℃)

-76

-76

-76

boiling point(℃)

more than 204

flash pont(open cup, ℃)

more than 260

alkalinity (m1n/1000hcl/30g)

from -3.0 to+1.0

iron (wt ppm)

less than 1

solubility

readily soluble in alcohols, esters and ketones, aromatic and chlorinated hydrocarbons. insoluble in aliphatic hydrocarbons and water. has a tendency to decrease its solubility as molecular weight increase.

hygroscopicity

these ptmeg are all hygroscopic. at room temperature, ptmeg can absorb up to 2wt% water depending on the molecular weight

product

ptmeg1000

ptmeg1800

ptmeg2000

ptmeg3000

molecular weight (g/mol)

1000±50

1800±50

2000±50

3000±50

hydroxyl number (mgkoh/g)

106.9-118.1

60.6-64.1

54.7-57.5

36.2-38.7

color

max. 30 ahpa

acid number

max. 0.05 mgkoh/g

water

max. 200 wt ppm

peroxide

max. 10 wt ppm as

volatiles

max. 0.1 wt%

stabilizer

220±50 wt ppm