Material scientific view point

P 2005 KohM Takatoh, MasaM Hasegawa, Mitsuhiro Koden, Nobuyuki Itoh, Ray Hasegawa and Masanori Sakamoto 

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In spite of the presence of ECC, the sample exhibiting a domain structure remains unoriented on the macroscopic level. Figure 3 c shows a great difference in the structures obtained, if molecular orientation exists and if hydrostatic compression is applied. Although the method of hydrostatic compression of the melt is of paramount importance from the scientific view point just for samples crystallized under pressure it was possible to prove unequivocally the existence of ECC), it does not allow a direct preparation of oriented samples of high strength (they are brittle and readily crumble to powder under minimum strain). However, the material obtained in this way can probably serve as a semi-finished product for further technological treatment that would improve its mechanical properties. 

It was the aim of the present paper to show that crystallization in incompatible polymer blends can exhibit a lot of peculiar effects beside the classical well known physical and physico-chemical phenomena. The effects considered here, in particular, are due to the dispersion structure of such blends, and to the changes in the crystallization nucleation conditions which are such caused. They are important from a physical, a material scientific, and a technological point of view as well. 

Unfortunately, activity and stability for a given material as a rule do not proceed in parallel. Rather, they vary in opposite directions. Hence the search for more and more active materials must find a compromise with an acceptable stability. Academic research as a rule overemphasizes activity, whereas industry does so for stability. For this reason, it can happen that academic research reports very interesting activity properties but without any industrial interest. On the other hand, industrial breakthroughs may be emphasized that have in fact no scientific relevance. This is just to stress that a single point of view never offers an exhaustive picture of a problem. 

Some attention was given to the study of arithmetic and geometry. Natural sciences—astronomy, botany and zoology—received some attention from a classificatory point of view, but the writings upon these subjects were curiously mingled with fabulous and mystical matter. Anything that may be considered as any material revival or continuation of the scientific interest in the study of nature in Christian Europe was to wait until the twelfth and thirteenth centuries. 

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