Effect of polymer blending

Table 12.35. Effect of polymer blending on tree growth and length [Wu and Chen, 1983]...

The effect of polymer blending on flammabihty was studied in combination of ABS (one of the most flammable polymers) and PVC (intrinsically flame retardant). The 30 wt% PVC in blend was not sufficient to make substantial changes in ABS behavior.Only the addition of iron peroxide helped to increase LOI and reduce smoke by 45%. 

The effect of polymer blend morphology on the stiffness and toughness of blends of ethylene-co-propylene rubber (EPR) in polyamides (PA) has been the subject of a number of recent papers and patents (1-7). In these toughened blends, the rubber exists as a separate phase of discrete particles. It has been shown that both the rubber particles size and total volume fraction have an effect on toughness and, especially, the ductile-to-brittle transition temperature (DBTT). 

Duvvuri S, Gaurav Janoria K, Mitra AK. Effect of polymer blending on the release of ganciclovir from PLGA microspheres. Pharm Res 2006 23(1) 215—23. 

S. M. Samani, H. Montaseri, and A. Kazemi, The effect of polymer blends on release profiles of diclofenac sodium from matrices, Eur. J. Pharm. Biopharm., 55 (3), 351-355, 2003. 

Ihm DW, Noh JG, Kim JY (2002) Effect of polymer blending and drawing conditions on proptaties of polyethylene separator uepared for Li-ion secondary battery. J Power Sources 109 388-393... 

Sjoerdsma S.D., Bleijenberg A.C.A.M., and Heikens D., The Poisson ratio of polymer blend, effects of adhesion and correlation with the Kemer packed grain model. Polymer, 22, 619, 1981. 

Kammer, H. W., Kressler, H. and Kummerioewe, C Phase Behavior of Polymer Blends - Effects of Thermodynamics and Rheology. Vol. 106, pp, 31-86. 

The formation of migration paths of dispersed particles as shown in Fig. 9 suggests a new approach for the modulation of polymer blends and morphology. It is expected that ER or MR effects show not only smartness but also unique anisotropy therefore, many workers are studying these effects from the point of view of polymer processing. 

In the case of polymer blends, the fractionated crystallization phenomenon that has been widely reported for many polymer systems can not be attributed to simple size effects. For instance, in Fig. 1, one could argue that the different exotherms originated in the crystallization of different droplet populations that have diverse average diameters. This cannot be the case, since the droplet distribution is monomodal and a smooth variation in heat... 

Figure 20.10 The effect of the blending time as a function of sequence length of the PET ( ) and PEN ( ) segments for the PHB/PEN/PET (40/30/30 (mol%)) blends [31]. From Park, J. K., Jeong, B. J. and Kim, S. H., Pseudo liquid crystallinity and characteristics of PHB/PEN/PET melt blend, Polym. (Korea), 24, 113-123 (2000). Reproduced by permission of The Polymer Society of Korea...

The first papers describing an LC LC separations of polymer blends due to the barrier effects were published in the mid-1990s [226,227] and the explanation of separation principle was originally presented in 1996 [231]. The review of both LC LC procedures and systems, as well as their first applications can be found in Ref. [28]. 

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