天然橡胶

J. Chem. Phys. 132(7) , 074906, (2010)

The primary alpha-relaxation time (tau(alpha)) for molecular and polymeric glass formers probed by dielectric spectroscopy and two light scattering techniques (depolarized light scattering and photon correlation spectroscopy) relates to the decay of the torsi...

J. Phys. Chem. B 113(12) , 3726-37, (2009)

Polymeric bicontinuous microemulsions are thermodynamically stable structures typically formed by ternary blends of immiscible A and B homopolymers and a macromolecular surfactant such as an AB diblock copolymer. Investigations of these bicontinuous morpholog...

J. Chromatogr. A. 1224 , 27-34, (2012)

This paper presents results from the first analyses of the mesostructure of natural rubber (NR) by asymmetrical flow field flow fractionation (AF4). The results are compared with those obtained by size exclusion chromatography (SEC) in terms of average molar ...

Phytochemistry 69(14) , 2539-45, (2008)

Natural rubber, cis-1,4-polyisoprene, is a vital industrial material synthesized by plants via a side branch of the isoprenoid pathway by the enzyme rubber transferase. While the specific structure of this enzyme is not yet defined, based on activity it is pr...

Appl. Environ. Microbiol. 74(24) , 7643-53, (2008)

Gordonia westfalica Kb1 and Gordonia polyisoprenivorans VH2 induce the formation of an extracellular superoxide dismutase (SOD) during poly(cis-1,4-isoprene) degradation. To investigate the function of this enzyme in G. polyisoprenivorans VH2, the sodA gene w...

J. Appl. Microbiol. 109(3) , 1067-75, (2010)

Natural rubber (poly-[cis-1,4-isoprene]) can be cleaved into 12-oxo-4,8-dimethyltrideca-4,8-diene-1-al by rubber oxygenase A (RoxA) isolated from Xanthomonas sp. RoxA is a novel type of dihaem dioxygenase with unknown cleavage mechanism of the rubber carbon b...

BMC Biochem. 11 , 11, (2010)

Natural rubber is a biopolymer with exceptional qualities that cannot be completely replaced using synthetic alternatives. Although several key enzymes in the rubber biosynthetic pathway have been isolated, mainly from plants such as Hevea brasiliensis, Ficus...

J. Phys. Chem. B 112(20) , 6358-62, (2008)

Poly(isoprene)-block-poly(ethylene oxide) (PI-b-PEO) diblock copolymers form micelles in water. The introduction of poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-b-PPO-b-PEO) triblock copolymer leads to the formation of mixe...

Eur. Phys. J. E 33(4) , 343-50, (2010)

We simulate ABA triblock copolymer melts using a lattice Monte Carlo method, known as cooperative motion algorithm, probing various degrees of compositional asymmetry. Selected order-disorder transition lines are determined in terms of the segment incompatibi...

Chem. Asian J. 7(1) , 143-55, (2012)

The novel double-stage convergent synthesis of a new class of polyisoprene terpenoid (PIPTP) dendrons is described. PIPTP dendrons bear a highly branched aliphatic hydrocarbon skeleton and a hydrophilic hydroxy focal point functionality. These dendrons have t...