Composites grafted synthetic polymer

The above results shown in Figs. 12 and 13 can be discussed in connection with the application of the thermoplasticized wood. The thermoplasticized wood can be used as material for molding, and as one way of utilization, can be used as blend composites with synthetic polymers. If this blending is made by grafting as shown above, two benefits can at least be pointed out (a) the thermoplasticity of wood materials is enhanced. (Better results can be obtained with esterified wood.) (b) the compatibility of the plasticized wood with synthetic polymers increases by the grafting. These factors are considered to be advantageous for preparing molded composites with excellent final properties. 

The structural complexity of synthetic polymers can be described using the concept of molecular heterogeneity (see Fig. 1) meaning the different aspects of molar mass distribution (MMD), distribution in chemical composition (CCD), functionality type distribution (FTD) and molecular architecture distribution (MAD). They can be superimposed one on another, i.e. bifunctional molecules can be linear or branched, linear molecules can be mono- or bifunctional, copolymers can be block or graft copolymers, etc. In order to characterize complex polymers it is necessary to know the molar mass distribution within each type of heterogeneity. 

To address these problems, techniques to prepare spherical composites and grafted polymers have been developed. MIPs were polymerised in the pores of spherical synthetic polymer beads and silica particles [23-25]. The selectivities of these materials were in the same range as those obtained on irregular particles prepared from bulk polymers, while the chromatographic efficiencies were improved. 

Synthetic polymers can vary their structure or achieve chemical modification relatively easily. Thus, attempts have been made to determine optimum composition by changing the composition of grafts and experimental conditions. A typical polymer is a polyacrylamide that is used for inclusion. Despite problems such as increased temperature fi om the heat of poljmierization and the toxicity of the monomer, it has long been used as a substrate because the polymerization process has been understood and handling is easy. 

We have also explored the possibility of utilizing HA, both at the micro- and nanolevel, in conjunction with natural and synthetic polymers in the form of composites suitable for bone grafting and bone drug delivery [103-107]. It should also be noted that most of the above composites differ from host bone either... 

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