Effect of glass transition

S. P. Duddu, and P. R. Dal Monte, Effect of glass transition temperature on the stability of lyophilized formulations containing a chimeric therapeutic antibody, Pharm. Res., 14(5), 591 (1997). 

Karel, M., Buera, M.P., and Roos, Y. 1993. Effects of glass transitions on processing and storage. In The Glassy State in Foods (J.M.V. Blanshard and P.J. Lillford, eds), pp. 13-34. Nottingham Univ. Press, Loughborough, Leicestershire. 

Lievonen, S.M. and Roos, Y.H. 2002a. Nonenzymatic browning in amorphous food models Effect of glass transition and water. J. Food Sci. 67, 2100-2106. 

Karmas, R., Buera, M.P., and Karel, M. 1992. Effect of glass transition on rates of nonenzymatic browning in food systems. J. Agricult. Food Chem. 40, 873-879. 

Table 6.11 Effect of glass transition temperature Tg on the properties of acrylic-latex-modified mortar (Ma and Brown)...

Siahkolah, M. A., The Effect of Glass Transition Temperature of Poly-... 

Figure 7.26. State diagram for gluten (Reproduced with permission from Toufeili, Lambert, and Kokini, 2002, Effect of glass transition and cross-linking on rheological properties of gluten development of a preliminary state diagram. Cereal Chem. 79, pp. 138-142, American Association of Cereal Chemists.)...

Figure 7.29. A state diagram representing the position of various food products (Reproduced with permission from Effects of glass transition on processing and storage by Karel, Buera, and Roos (In The Glassy State in Foods, Blanshard and Lillford (Eds.)), 1993, Nottingham...

Stubberud L, Arwidsson HG, Hjortsberg V, Graffner C. Water-solid interactions. Part 3. Effect of glass transition temperature, Tg and processing on tensile strength of compacts of lactose and lactose/polyvinyl pyrrolidone. Pharm Dev Technol 1996 1(2) 195-204. 

The effect of glass-transition temperature on moisture diffusivity. Diamonds represent moisture diffusivity data while squares represent Tg as a function of a. Once the matrix undergoes glass transition, diffusion rates increases dramatically. 

Karmas, R. and Karel, M. The effect of glass transition on Maillard browning in food models, Maillard Reactions in Chemistry, Food, and Health, T.R Labuza, G.A. Reineccius, V.M. Monnier, J. O Brien and J.W. Baynes, eds.. The Royal Society of Chemistry, Cambridge, U.K., pp. 182-187, 1994. 

Figure 5. Effect of temperature and transitions on penetrant diffusion coefficients. Left cyclopropane in high-density polyethylene to illustrate effect of melting point. Right CO2 in AN/MA copolymer to show effect of glass transition. Note reversed 1/T scale is used.

K. Ueno, N. Hirano, O. Tsutsumi, T. Shiono and T. Ikeda, Liquid-crystalline materials for photonics Effect of glass transition on stability of optical image stored in polymer azobenzene liquid crystals, Polym. Prepr., Jpn., 1995, 44, 1820. 

Supriyatno H., Yamashita M., Nakagawa K., and Sadaoka Y., Optochemical sensor for HCl gas based on tetraphenylporphyrin dispersed in styrene-acrylate copolymers Effects of glass transition temperature of matrix on HCl detection. Sens. Actuators B, 85, 197-204, 2002. 

Figure 4.13 Effect of glass transition temperature (Tg) of polymers on flexural and compressive strengths of latex-modified mortars with polymer-cement ratio of 15%. ( 1993, ASTM, reprinted with permission.)...

Schneider, et examined the effect of glass transition temperature (Tg) on the adhesion (to plywood) and flexibility of redispersible EVA powder-modified mortars for plywood substrates, and found that EVA powder with a glass transition temperature of -10°C is more effective than one with a glass transition temperature of 10°C. 

As shown in Tables 11.1 and 11.2, the heat distortion temperatures (HDT) for PLA do not change much with molecular weight. Amorphous and crystalline PLLA show HDT values of55-57°C and 60-66°C, respectively, therefore PLA heat deflection temperature seems little influenced by its crystallinity crystalline PLA reaches slightly higher heat resistance than amorphous PLA. This is due to main effect of glass transition temperature onto HDT, effect that is very similar in both cases. Heat distortion temperature value for PDLLA is around 50°C and this difference is easily understandable if we take into consideration the physicochemical properties of this material in fact, PDLLA exhibits the lowest Tg, around 50°C, approximately corresponding to its HDT value. 

Willis, B., Okos, M., Campanella, 0 1999. Effects of glass transition on stress development during drying of a shrinking food system. Proceeding of the 6 Conference cf Food Engineering (CoFE099), November, Dallas, Texas, 446 51. 

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