Morphology, elastomers orientation

Sauer B B, McLean R S, Brill D J and Londono D J (2002) Morphology and Orientation during the Deformation of Segmented Elastomers Studied with Small-Augle X-ray Scattering and Atomic Force Microscopy, J Polym Sci Part B Polym Phys 40 1727-1740. 

Sauer B B, McLean R S and Brill D J Londono J D (2001) Morphology and orientation during deformation of segmented elastomers studied by SAXS and atomic force microscopy, Abstr 222 ACS Meet, Chicago III, USA, PMSE-163. 

Other Classification Criteria. Other levels of classification should be superimposed on the above. These include latex, suspension, and bulk type syntheses, all of which result in different properties of the final materials. Uses of plastic-forming and elastomer-forming monomers and crystalline and amorphous structures must be distinguished. The tacticity of the polymers is sometimes important. Of course, the ratio of both polymer masses dictates the overall morphology. Physical operations such as swelling, annealing, and orienting must be considered in any complete treatment. 

Cross-linked elastomers (the other main class of polymers studied by ESR) can be pre-strained above Tg to any desired extent (up to fracture) and their orientation stabilised by cooling below Tg before testing. At high pre-strains, strain-induced crystallization may occur providing a morphology essentially similar to that of synthetic fibres Cross-linked polymers may therefore be used to explore in a systematic manner, the role of strain and orientation in rmlecular fracture. 

Fig. 17.11 AFM images of PP/PP-g-MA/MMT/EOR nanocomposites showing elastomer particle morphology as a function of MMT content and PP molecular weight grade. The PP-g-MA/ organoclay ratio is 1.0 and elastomer content is 30 wt%. All images were taken from the core of the injection-molded sample and viewed parallel to TD elastomer particles are oriented parallel to FD (Tiwari and Paul 2011b)...

Kuhner G, Voll M (1993) Manufacture of carbon black. In Doimet J-B, Bansal RC, Wang M-J (eds) Carbon black science and technology. Taylor Francis, London, p 1 Kyrylyuk AV, van der School P (2008) Continuum percolation of carbon nanotubes in polymeric and colloidal media. Proc Nat Acad Sci USA 105 8221 Lacey D, Beattie HN, Mitchell GR, Pople JA (1998) Orientation effects in monodomain nematic liquid crystalline polysiloxane elastomers. J Mater Chem 8 53 Laird ED, Li CY (2013) Structure and morphology control in crystalline polymer-carbon nanotube nanocomposiles. Macromolecules 46 2877... 

An HISPS is a multicomponent blend comprising SPS, PPO, SEES triblock copolymer, and MA-g-SEBS. Controlling the morphology of HISPS is a key point to enhance the mechanical properties. There are a lot of structural factors that should be controlled, for example, the size and the orientation of elastomer domains and the degree of crystallinity in the SPS matrix, and also the interfacial thickness between the domain and the matrix. 

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