Kwak et al., “Silica Sol-Gel Compositions Specifically Tailored for Acid-Sensitive Organic Photochromics,” PPG Technol. J. (1996), 2(1), 45-49.* |
Hou et al., “Enhancement of Photochromic Performance of Spirooxazine in Sol-Gel Derived Organic-Inorganic Hybrid Matrices by Additives,” J. Sol-Gel. Sci. Technol. (1997), 8(1/2/3), 927-929.* |
Hou et al., “Effect of Heat Treatment and Additives on the Photochromic and Mechanical Properties of Sol-Gel Derived Photochromic Coatings Containing Spirooxazine,” J. Sol-Gel Sci. Technol. (1997), 8(1/2/3), 923-926.* |
Definition of “plastic” from Hawley's Condensed Chemical Dictionary, 12th Edition, © 1993 by Van Nostrand Reinhold, Richard J. Lewis, Sr., editor, pp. 922-923.* |
Kwak et al., “Silica Sol-Gel Compositions Specifically Tailored for Acid-Sensitive Organic Photochromics,” PPG Technol. J. (1996), 2(1), 45-49.* |
Hou et al., “Effect of Heat Treatment and Additives on the Photochromic and Mechanical Properties of sol-Gel Derived Photochromic Coatings Containing Spirooxazine,” J. Sol-Gel Sci. Technol. (1997), 8(1/2/3), 923-926.* |
PLASTIC Hawley's Condensed Chemical Dictionary, 12th ed., © 1993 by Van Nostrand Reinhold, Richard J. Lewis, Sr., ed., pp. 922-923. |