By Alejandro J. Müller, Vittoria Balsamo, María Luisa Arnal (auth.), Volker Abetz (eds.)
"Block coplolymers were studied for a number of a long time, a interval that has been punctuated via a couple of books and overview articles at the subject. regardless of this historical past, the topic is way from exhausted and, if whatever, has skilled a robust renewal lately. This has been speartheaded via an unlimited number of new block copolymers, the real improvement of robust visualization innovations, AFM particularly, that experience develop into on hand, in addition to motivating visions of nanotechnological applications.
In this context, this new two-volume e-book, with its specialize in the latest advancements within the region, is well timed. ...."
"These volumes can be thought of quintessential by way of any newcomer to the sector and should represent an invaluable refererence to many already within the field."
from: C.G. Bazuin, Université de Montréal, J. Am. Chem. Soc. 2006, 128 S. 9980-9981
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Additional resources for Block Copolymers II
The data shows a linear dependence when τV is plotted as a function of 1/[Tc (Tm – Tc )2 ] as is expected from classical nucleation theory (see inset). (Reprinted with permission from . J. Müller et al. group of data points correspond to experiments of Röttele et al. , who studied by atomic force microscopy the crystallization of PEO within a PB-bPEO block copolymer (with 17% PEO and 4300 g mol–1 for the PEO block). The PEO was conﬁned into 12-nm-diameter spherical MDs in a PB matrix. The isothermal crystallization temperature range for these much smaller PEO spheres encompasses – 31 to – 24 ◦ C, while the data of Massa and KalnokiVeress are for much larger PEO droplets of approximately 8–16 µm in diameter that were isothermally crystallized in the range – 6 to – 3 ◦ C.
This was attributed to the glassy character of the PS block. On the other hand, when it is linked to PI, which is rubbery at the crystallization temperature of the PEO block, the melting temperatures for PEO are higher. It should be mentioned, however, that the crystallinity degrees in both series of copolymers (PI-b-PS-b-PEO and PS-b-PI-b-PEO) are of the same order of magnitude, independent of the neighboring block. Then, the number of crystals is probably higher in those copolymers with a PS block linked to PEO, but their lamellar sizes are smaller as indicated by their lower Tm values.
83], the intermediate-size PEO spheres (diameters of approximately 100 nm) were prepared by miniemulsion polymerization . The smallest spheres correspond to nanodroplets obtained within block copolymers or in blends of block copolymers with a homopolymer where spherical morphologies have been obtained (Table 2). The triangles in Fig. 4 ◦ C min–1 ; these will be referred to as dynamic crystallization temperatures. In references where DSC cooling scans are reported, we have measured the crystallization onset and ﬁnal temperatures and plotted them with a vertical line as a temperature range around the triangles in Fig.