The concept of cooperation and distribution as known from the area of grammar systems is introduced to graph grammars; more precisely, to hyperedge replacement (for short, HR) grammars. This can be seen as a modest approach to controlled HR. Two diierent derivation modes are considered, the so called t-mode and the =k-mode. For the t-mode it is shown that the class of hypergraph languages obtai...

Polymer blends are formulated by mixing polymers with different chemical structures to create new materials with properties intermediate between those of the individual components. While Flory– Huggins ~FH! theory explains some basic trends in blend miscibility, the theory completely neglects the dissimilarity in monomer structures that is central to the fabrication of real blends. We systemati...

Amorphous poly(vinyl phenol) (PVPh) is introduced into poly(butylene succinate-cobutylene adipate)/poly(L-lactic acid) (PBSA/PLLA) blends via solution casting. Fourier transform infrared spectroscopy (FTIR) analysis verifies that intermolecular hydrogen bonding formed in PBSA/PVPh/PLLA blends. The miscibility between PBSA and PLLA is improved with PVPh incorporation as evidenced by approaching ...

Biomass derived fuels are preferred as alternative Fuels for IC engine due to its abundant availability and renewable nature. In the present work, the performance and emissions of diesel and diesel additive blended with palm kernel oil is studied, where the fuel, namely, methyl ester of palm kernel oil and diesel with additive were chosen and used as fuel in the form of blends. Various proporti...

The production of nanofibrous membranes finds high interest in the biomedical field, from drug delivery to wound dressing. types polymers used for these applications are mainly synthetic and natural biopolymers that have different properties, especially terms bioactivity, adhesion cells, mechanical properties. In current study, two processes, namely uniaxial electrospinning coaxial configuratio...

In the present study, a biopolymer (cellulose, rice starch or zein protein) was dissolved in the ionic liquid (1-butyl-3methylimidazolium chloride) and co-solvent (dimethyl sulfoxide) mixture (1:1 weight ratio), and then blended with the agar solution, followed by gelation at low temperature. The blends were soaked and shaken in 250 mL distilled water, washed and freeze-dried. The agar/biopolym...

The application of renewable raw materials encourages research in the biopolymers area. The Poly(Lacticco-Glycolic Acid)/Poly(Isoprene) (PLGA/IR) blend combines biocompatibility for application in the health field with excellent mechanical properties. The blend was obtained by solubilization of polymers in organic solvents. To investigate the polymer thermochemical properties, FTIR and DSC were...