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090			_aB-13498
245	1	0	_aThe Thermal Degradation of Poly(-(D)-/~- Hydroxybutyric Acid): Part 1 Identification and Quantitative Analysis of Products
490	0		_vPolymer Degradation and Stability, 6, p.47-61, 1984
520	3		_aPoly(-(D)-fl-hydroxybutyric acid)thermally degrades quantitatively under vacuum to volatile products at temperatures up to 338°C. Weight percentages oJ products are." dimer (41"2), crotonic acid (35"3), trimer (12.5), tetramer (2"9)and iso-crotonic acid (0"9). When the temperature is programmed to 500 °C either under vacuum or nitrogen at atmospheric pressure, small amounts of carbon dioxide, propene, ketene, acetaldehyde and fl-butyrolactone (only under vacuum)are also Jormed, but it is shown that these are secondary productsJormed byJurther decomposition of the primary products.
700	1	2	_aGrassie, N.
700	1	2	_aMurray, E.J.
700	1	2	_aHolmes, P.A.
856	4	0	_uhttps://drive.google.com/file/d/18iqIodY57f5M_gXQy-NeP-iev7h1F4Ds/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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