Solid phase
Official name
Poly(methyl methacrylate)
Secondary names
Poly(methyl 2-methylpropenoate); Methyl methacrylate resin; PMMA; acrylic glass; Plexiglas; Perspex
CAS number
9011-14-7
Type
Family
molecular solid
Class
non polar molecular solid
Compound type
homopolymer
Terminal function
$H$
Monomer number
n, up to ?
Molar mass
100.115 per mer unit $g/mol$
Polymolecularity index
1
Chemical composition
Formula
$H-(-CH_2CH_3C-COOCH_3)_n-H$
Chemical formula
(H2)(C5O2H8)n
Elemental formula
(C)10-n (H)18-n (O)4-n
Isotope mixture type
terrestrial abundance
None
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$\bullet[(CH_2CH_3C(COOCH_3))]\bullet$ methyl methacrylate mer molecule 2 - n 1 constituent mer main
$H$ Hydrogen element 2 1 constituent element main
Composition comments
The formula is n repeting units + 2 $-H$ terminal functions
Chemical functions
  Function Number
$R-C(=O)-O-R$ 1
Chemical bonds
  Bond Number
$\geq C-C \leq$ n
$\geq C-C \leq$ 2
$\eqslantgtr C-C\leq$ 1
$>C=O$ 1
$\eqslantgtr C-O-$ 1
$\geq C-O-$ 1
$\geq C-H$ 8
Class
molecular solids with apolar molecules (01)
Type
with polyatomic organic apolar molecules (CnHm...) (01.06)
Phase type
unknown
Molar mass
100.115 $g/mol$
Density
1.17 - 1.20 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid 160 °C (433 K)
Refringence type
unknown
Refraction index $n_{\alpha}$
1.4905 @ 589nm
Pure color
colorless
Diaphaneity
transparent
Luster
vitreous
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