LAGUNA DESIGN

Welcome to Polymer Journal

Browse Articles

  • Original Article |

    We developed flame-retardant thermoplastics directly from biomass just by dissolution into ionic liquids and precipitation. During the dissolution, a phosphonate-type ionic liquid adducted on the polymers included in biomass such as cellulose through reaction of the hydroxyl groups. In this method, more than 86% of the hydroxy groups were maintained after ionic liquid substitution because the single phosphonate-type ionic liquid acted as a plasticizer and flame retardant in the plant biomass. Therefore, the plant biomass-derived flame-retardant thermoplastics have the potential for further functionalization.

    • Ryunosuke Nishita
    • , Kosuke Kuroda
    • , Shiori Suzuki
    • , Kazuaki Ninomiya
    •  & Kenji Takahashi
  • Rapid Communication |

    The solid-state structure of L2AlEt is reported by X-ray diffraction. BnOH (1 equiv. to L2AlEt) selectively reacts with ~0.5 equiv. of L2AlEt to afford free L–H (~1 equiv.) while maintaining L2AlEt (~0.5 equiv.). The stoichiometric balance suggests the formation of 0.5 equiv. of (BnO)2AlEt. The ROP of CL via the synergic catalysis of the two coexistent Al-complexes, L2AlEt (0.50 mol%) as a Lewis acid activator of CL and (RO)2AlEt (0.50 mol%) as a nucleophile, is proposed.

    • Nobuyoshi Nomura
    • , Daisuke Yamakawa
    • , Tomohiro Marutani
    • , Takuji Aoyama
    •  & Masataka Oishi
  • Original Article |

    The aqueous oxidative coupling polymerization of 3,4-ethylenedioxythiophene was conducted in the presence of heptadecafluorooctane sulfonic acid, which was used as a perfluoroalkyl dopant to synthesize hydrophobic poly(3,4-ethylenedioxythiophene) particles. The dried poly(3,4-ethylenedioxythiophene) particles could be used as a near-infrared-responsive liquid marble stabilizer exhibiting light-to-heat conversion properties. The movement of the poly(3,4-ethylenedioxythiophene) particle-coated liquid marbles on a planar water surface was driven by near-infrared laser-induced Marangoni propulsion.

    • Natsuko Shimogama
    • , Makoto Uda
    • , Keigo Oyama
    • , Haruka Hanochi
    • , Tomoyasu Hirai
    • , Yoshinobu Nakamura
    •  & Syuji Fujii
  • Original Article |

    The electro-optic properties of polymer-stabilized blue phases (PSBP) with polar chiral dopant and polar substituent on polymer were significantly enhanced, which is in sharp contrast with the trend observed for PSBP with conventional chiral dopant. These results indicate that polar chiral dopant showing good affinity with polar polymer induces weak anchoring condition inside PSBP.

    • Daisuke Yoshizawa
    • , Yasushi Okumura
    • , Jun Yamamoto
    •  & Hirotsugu Kikuchi
  • Original Article |

    Concentrated poly(ethylene carbonate) (PEC) and poly(trimethylene carbonate) (PTMC) blend electrolytes with 150 mol% of LiFSI were prepared and the PEC6PTMC4 electrolyte was applied in all-solid-state Li batteries. The blend electrolyte has an ionic conductivity of 10−5 S cm−1 and a Li+ transference number (t+) of 0.73. Meanwhile, the PEC6PTMC4 electrolyte exhibits a good electrochemical stability with Li electrode than those of PEC and PTMC single-polymer electrolytes. An LFP half-cell exhibits a discharge capacity of 150 mAh g−1 at 50 °C and a C/10 rate.

    • Zhenguang Li
    • , Jonas Mindemark
    • , Daniel Brandell
    •  & Yoichi Tominaga
  • Original Article |

    We described the synthesis of PGA via an azeotropic distillation method that enables tunable molecular weights. This alternative method produces a white powdered PGA rather than a waxy brown product that is obtained by conventional melt-solid condensation methods. Additionally, improved solubility renders this method useful for producing soluble high molecular weight PGA for further applications. Highly crystalline PGA with a high molecular weight (Mn = 32,100 g/mol) was obtained with a homogenous polydispersity index of 1.2–1.4.

    • Vildan Sanko
    • , Isa Sahin
    • , Umran Aydemir Sezer
    •  & Serdar Sezer
  • Original Article |

    The toughness and flame retardancy of glass fiber (GF)-reinforced polycarbonate (PC) composites were tested by adding four impact modifiers and three kinds of flame reardants. Silicon acrylate rubber (SiR) could significantly toughen the composites by 2.52 times. Then only by addition of 0.2 wt% oligomeric siloxane-containing potassium dodecyl diphenylsulfone sulfonate (SiKSS), PC/GF/SiR composites can achieve good flame retardancy with a V0 rating in UL-94 burning vertical test. This formulation also maintained the system a relative high heat deflection temperature around 120 °C.

    • Jun Lin
    • , Jiao Li
    • , Xiuhong Li
    • , Yanjin Guan
    • , Guilong Wang
    •  & Liang Chen
  • Original Article |

    The deviant and irregular polymerization behavior of 4-acetoxystyrene was found through the detailed study on the ATRP of various para-substituted styrenes bearing electron-withdrawing and electron-donating groups. The relationship between the rate constant for polymerization rate and the Hammett parameter was discussed.

    • Hayato Yoshioka
    • , Kazuo Yamaguchi
    •  & Motoyasu Kobayashi
  • Original Article |

    A novel surface wrinkling system, based on the fabrication of a polyion complex (PIC) skin layer, is introduced. PIC skin layers are fabricated on the surface of chitosan (CS) films via immersion in sodium alginate (AG) solutions. After removal of excess adsorbed AG, microscopic wrinkles appear upon drying. Water resistance in the wrinkled films was achieved by thermal crosslinking of the PIC skin layer. The thermally crosslinked wrinkled surfaces that were composed of covalently crosslinked CS and AG exhibited low cell adhesiveness and are suitable for use in implantable materials.

    • Hironori Izawa
    • , Yuka Miyazaki
    • , Tomoe Yonemura
    • , Norihiko Ito
    • , Yoshiharu Okamoto
    • , Shinsuke Ifuku
    • , Minoru Morimoto
    •  & Hiroyuki Saimoto