R O H M & H A A S ACRYLIC G L A S S TEMPERATURE ANALYZER GLASS TEMPERATURE FACTORS
Methyl Acryiate
Ethyl Acrylate
Butyl Acrylate
2-Ethylhexyl Acrylate
Methyl Methacrylafe
5 10 15 20 25
.18 .35 .53 .71 .89
.20 .40 .59 .79 .99
.22 .44 .66 .88 1.10
.23 .46 .69 .92 1.15
.13 .26 .40 .53 .66
30 35 40 45 50
1.06 1.24 1.42 1.60 1.77
1.19 1.38 1.58 1.78 1.98
1.32 1.54 1.75 1.97 2.19
1.38 1.61 1.83 2.06 2.29
.79 .93 1.06 1.19 1.32
55 60 65 70 75
1.95 2.12 2.30 2.48 2.66
2.17 2.37 2.57 2.77 2.96
2.41 2.63 2.85 3.07 3 29
2.52 2.75 2.98 3.21 3.44
1.46 1.59 1.72 1.85 1.98
80 85 90 95 100
2.83 3.01 3.19 336 3.54
3.16 3.36 3.56 3.75 3.95
3.51 3.73 3.95 4.17 4.39
3.67 3.90 4.13 4.36 4.59
2.12 2.25 2.38 2.51 2.65
Percent
DIRECTIONS ©
Find d e s i r e d
percentage
composition a n d g e t
c o r r e s p o n d i n g glass t e m p e r a t u r e ©
factor.
A d d t e m p e r a t u r e factors a n d g e t a c t u a l glass
temperature
of polymer
made
f r o m these
mono-
mers f r o m conversion c h a r t o n reverse side. EXAMPLE Monomer Mothyl MothcKryloto Ethyl Aery lato Butyl Mothocrylato
Forcent
Tamp, factor
55 40 5
1.46 1.58 .17 3.21
Tomporaturo factor of 3.21 corresponds to glass température of co 3 8 * C and 1 0 0 * F . *
Tg gives you a guide to experimental copolymer properties Glass temperature (Tg)—the temperature at which an amorphous polymer changes from a hard, glassy state to a flexible, rubbery substance—is a valuable indicator for characterizing a polymer's hardness, film-forming properties, and other temperature-dependent characteristics. The Rohm & Haas Acrylic Glass Temperature Analyzer makes it easy for you to predict the glass temperatures of 100%-acrylic copolymers, or co-
Rohm & Haas acrylic monomer service gives you a guide to T g
polymers of acrylates or methacrylates combined with other common monomers. Factors are given for percent level of each monomer in a polymer composition. You simply add these factors and then obtain Tg from a con-
ROHIV1 HA & AS P H I L A D E L P H I A
5 , P A .
version chart. The acrylic monomers available from Rohm & Haas plus the Glass Temperature Analyzer permit you to design the copolymer having the flexibility or rigidity you need. This Glass Temperature Analyzer represents only one of the many technical services Rohm & Haas offers to acrylic monomer users. Write to Dept. SP-b for a free Glass Temperature Analyzer. Monomer samples and literature are also available on request.
R o h m & H a a s a c r y l i c m o n o m e r s : Methyl Acrylate · Ethyl Acrylate · Butyl Acrylate · 2-Ethylhexyl Acrylate • Methyl Methacrylate · Ethyl Methacrylate · Butyl Methacrylate · Isobutyl Methacrylate · Lauryl Methacrylate · Stearyl Methacrylate · Dimethylaminoethyl Methacrylate · t-Butylaminoethyl Methacrylate · Hydroxyethyl Methacrylate • Hydroxypropyl Methacrylate · Butylène Dimethacrylate · Glacial Acrylic Acid · Glacial Methacrylic Acid C & Ε Ν 59
