Development of a Synthetic Polymer Burn Covering.
Progress rept. no. 1, 1 Feb-23 Mar 73,
DYNATECH R/D CO CAMBRIDGE MASS
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In the study for the development of a synthetic burn covering, lactic acid monomer has been bulk polymerized to the polymer, polylactic acid PLA, with molecular weights ranging from 20,000 to 45,000 using a tetraphenyl tin catalyst. Films 0.001 to 0.003 inches in thickness of PLA have been cast. Pervaporation rates of water through the PLA films have been measured to be approximately 10 gm-mm24 hr square m in a 37 C, 0 relative humidity R.H. ENVIRONMENT AND APPROXIMATELY 4 GM MM24 HR SQUARE M IN A 37 C, 53 R.H. environment. Tensile strength, elongation at break, and Youngs Moduli of 300,000 to 450,000 psi jaw separation rate 0.1 inchesmin have been calculated using stress-strain data from standard tensile tests. Author, modified-PL
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