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Broadband dielectric spectroscopy is employed to investigate the non-Debye relaxation behavior in a dendrimeric alkyd resin. From temperature-dependent measurements at ambient pressure, we found a very broad distribution of relaxation times. This is attributed to the complex geometrical topology of the molecule. However, compression significantly reduces the non-Debye character of the dielectric response; thus, pressure induces dynamic homogeneity in the dendrimeric alkyd resin.

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Streszczenie-Na podstawie literatury omówiono zagadnienia zwi¹zane ze zjawiskiem graffiti i ochron¹ przed atakami graffiti. ZwiêŸle opisano techniki nanoszenia graffiti i materia³y do tego wykorzystywane. Przedstawiono sposoby zapobiegania powstawaniu wymalowañ oraz ich usuwania z ró¿nych (np. porowatych lub nieporowatych) powierzchni. Szczegó³owo zaprezentowano wyroby lakierowe tworz¹ce pow³oki antygraffiti, uwzglêdniaj¹c przy tym kierunki ich zastosowañ oraz metody usuwania graffiti z pod³o¿y zabezpieczonych takimi wyrobami. S³owa kluczowe: graffiti, preparaty antygraffiti, pow³oki lakierowe antygraffiti, usuwanie graffiti. ANTI-GRAFFITI PROTECTIVE COATINGS Summary-The problems concerning graffiti phenomenon (Fig. 1 and 2) were discussed on the basis of literature review. The techniques of graffiti spread and materials used were described shortly. The methods of protection against graffiti and their removal from various surfaces (e.g. porous or non-porous) were presented. The varnishes forming anti-graffiti coatings were presented in detail. Directions of their applications as well as the methods of graffiti removal from substrates protected with such varnishes were discussed (Table 1).