Page 352 - Biomedical Engineering and Design Handbook Volume 1, Fundamentals

BIOPOLYMERS 329

TABLE 13.6 Literature Values for Physical Properties of Bioinert Plastics
Specific Tensile Elastic
Material gravity strength, psi modulus, ksi T g , C T , C
m
Cellulose acetate 1.22–1.34 a 1900–9000 a 580 b 230 b
Polyether ether ketone (PEEK) 1.30 e 14,000 e 508 e 143 e 343 e
∗
†
Nylon 6,6 1.13–1.15 a 11,000 –13,700 ∗,a 230 –550 a 50 c 255–265 a
†
230 –500 a
Poly(methyl methacrylate) 1.17–1.20 a 7000–10,500 a 325–470 a 85–105 a Amorphous
†
Nylon 6 1.12–1.14 a 6000 –24,000 a 380 –464 a 40–52 c 210–220 a
∗
†
100 –247 a
Poly(ethylene terephthalate) 1.30–1.38 a 8200–8700 a 280–435 a 62–77 c 220–267 a
Poly (vinyl chloride) 1.39–1.43 b 7200 d 363 d 75–85 b 120–210 b
Polypropylene 0.90–0.91 a 4500–6000 a 165–225 a –20 a 160–175 a
High density polyethylene 0.95–0.97 a 3200–4500 a 155–158 a –125 c 130–137 a
Poly(tetrafluoroethylene) 2.14–2.20 a 3000–5000 a 58–80 a –80, 126 c 327 a
Perfluorinated ethylene-propylene 2.12–2.17 a 2700–3100 a 50 a –90, 70 c 275 a
∗ Tested at 0.2 percent moisture content.
† Tested after conditioning at 50 percent relative humidity.
Source:
a Data from Modern Plastics Encyclopedia. McGraw-Hill 1999.
b Data from Encyclopedia of Polymer Science and Engineering, 2d ed. New York: John Wiley and Sons, 1985.
c Data from Polymer Handbook, 3rd ed. New York: John Wiley and Sons, 1989.
d Data from Encyclopedia of Materials Engineering. Cambridge, MA: MIT Press, 1986.
e Data from Victrex plastics, UK product literature.
TABLE 13.7 Physical Properties for Degradable Polyesters
Tensile Elastic
Material strength, psi modulus, ksi T g , C T , C
m
Polyglycolide ∗ 10,000 1000 35–40 225–230
Poly (L-lactide) ∗ 8000–12,000 600 60–65 173–178
50/50 Poly(DL-lactide-co- 6000–8000 400 45–50 Amorphous
glycolide) ∗
Poly (DL-Lactide) ∗ 4000–6000 400 55–60 Amorphous
Polycaprolactone ∗ 3000–5000 50 −65–0 58–63
Poly(3HB) † 5800 500 4 177
Poly(3HB-co-20%3HV) † 4600 170 −1 145
Poly(4HB) † 15,100 22 −50 60
Poly(3HB-co-16%4HB) † 3800 Not meas. −8 152
∗
Data from Birmingham polymers product literature.
†
Data from Biopolymers, Volume 4, Polyesters III—Applications and Commercial Products, Chapter 4:
“Applications of PHAs in Medicine and Pharmacy.” Page 96. Authors: Simon F. Williams and David P.
Martin. Editors Yoshiharu Doi, Alexander Steinbuchel.
Cellulose. Degradation: bioinert.

OH
CH 2 CH 2 OH
H O H O
H H
OH H O OH H O
H H
H OH H OH n
Cellulose: Poly(1, 4'-β-D-glucopyranose)