Effect of glass transition temperature

Lievonen et al.lu analysed the temperature dependence of NEB, using the Arrhenius equation. All systems could be analysed, five of the six giving a visually observable break, usually 2-12 °C above T. For glucose/MD, the break was observed below Tg and, for glucose/PVP, no break was apparent. calculated for 

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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). 

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-... 

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. 

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. 

Nojima S, Tanaka H, Rohadi A, Sasaki S. The effect of glass transition temperature on the crystallization of e-caprolactone-styrene diblock copolymers. Polymer 1998 39 1727-1734. 

Dong XM, Luo Y, Xie LN, Fu RW, Zhang MQ (2008) Conductive caibon black-filled polymethacrylate composites as gas sensing materials effect of glass transition temperature. Thin Solid Films 516 7886... 

Understanding the effects of orientational enhancements has been made more complex, however, by the need to account for supramolecular interactions such as dipolar aggregation, the tendency of dipoles to adopt align antiparallel with their neighbors (38). Several studies have explored the effects of glass transition temperature on polymeric photorefractive properties (46-48). 

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