Natural rubber, nanomatrix structure

Photoreactive Nanomatrix Structures Formed by Graft Copolymerization of 1,9-Nonanediol Dimethacrylate onto Natural Rubber... 

A TEM photograph for DPNR-gra/l-poly(NDMA) is shown in Figure 14. 10, in which a gloomy domain is natural rubber and a bright domain is poly(NDMA). As it is clearly seen, the natural rubber partiele of about 1.0 pm in diameter was dispersed in a poly(NDMA) matrix of 10 mn in thickness to form a nanomatrix structure, while it did not contain poly(NDMA). Furthermore, a volume fraction of poly(NDMA) matrix was estimated by image analysis of the photograph to be about 3 w/w%, which corresponded to 1.81 w/w% estimated from the NDMA content shown in Table 14.2. These results indicate that the graft copolymerization occurs only on the surface of... 

The photoreactive nanomatrix structure was formed by graft copolymerization of the inclusion complex of NDMA with p-CD onto deproteinized natural rubber. The content, conversion and residual methacryloyl group of NDMA for the graft copolymerization were 1.81%, 58.5% and 45.3%, respectively, at NDMA feed of 150 g/kg rubber and initiator concentration of 0.033 mol/kg rubber. The TEM observation of the resulting graft copolymer showed that natural rubber particles of about 1.0 pm in diameter were dispersed in a poly(NDMA) matrix of 10 nm in thickness. 

Properties and Nano-observation of Natural Rubber with Nanomatrix Structure... 

PROPERTIES OF NATURAL RUBBER WITH NANOMATRIX STRUCTURE Elastic Property of Natural Rubber... 

Figure 12. Storage modulus at plateau region versus frequency for (A) natural rubber, (B) DPNR-graft-PS (PS ca 10%) with island-matrix structure, (C) DPNR-graft-PS (PS ca 10%) with the nanomatrix structure annealed at 30°C and (D) DPNR-graft-PS (PS ca 10%) with the nanomatrix structure annealed at 130°C. The plateau modulus characteristic of the rubbery material increased a little with the island-matrix-structure and dramatically with the nanomatrix structure, respectively. As for the nanomatrix structured material, the plateau modulus increased about 35 times as high as that of natural rubber, after annealing it at 130. ...

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