Polymer characterization

Polymer characterization is the process of determining the size, structure and physical properties (such as thermal and mechanical properties) of polymeric materials.

Latest Research and Reviews

  • Research |

    Thickness changes in polyvinyl acetate thin films, during the temperature cycle across the glass transition temperature (Tg) has been studied in detail. Even after enough thermal treatment done at the high-temperature side of Tg, thickness increase during cooling (negative thermal expansion) is observed. On the other hand, slow thickness decrease is observed with aging at the high-temperature side of Tg. The above interesting phenomena can be well explained by the model considering the presence and changes of the interface layer.

    • Yuwei Liu
    •  & Kenji Sakurai
  • Research |

    Gas transport properties of novel polybenzoxazole (PBO)—silica hybrid membranes prepared via sol–gel rand different thermal treatment protocols were investigated. The hybrid membranes showed enhancements of CO2 permeability and CO2/CH4 selectivity with increasing silica content and thermal treatment temperature. The excellent CO2/CH4 separation ability might be achieved by free volume holes crated around polymer/silica interfacial area and increased intermolecular chain distance.

    • Tomoyuki Suzuki
    •  & Azumi Saito
  • Research | | open

    Increasing the selectivity of desalination membranes is of crucial importance for advancing membrane desalination technologies. Here the authors demonstrate a plasticizing-extracting process for tuning the permselectivity of polymeric membranes and achieving desired desalination performance.

    • Xinglin Lu
    • , Xunda Feng
    • , Yi Yang
    • , Jin Jiang
    • , Wei Cheng
    • , Caihong Liu
    • , Manesh Gopinadhan
    • , Chinedum O. Osuji
    • , Jun Ma
    •  & Menachem Elimelech
  • Research |

    Salt concentration dependence of NaPSS polymacromonomer with 110 monomeric units on each side chain (unfilled circles) cannot be explained by the theory assuming the Debye–Hűckel (DH) potential under the ionic strength outside the brush (dotted line), but can be explained using the DH potential under the ionic strength inside the brush (dashed line) along with the interactions without ionic ones (dot-dashed line).

    • Yusuke Kitagawa
    • , Yusuke Hasegawa
    • , Keita Ide
    •  & Yo Nakamura
  • Research | | open

    Digital polymers with precisely ordered units for next-generation data storage media are continually investigated for higher storage capacity. Here the authors show the synthesis of information-coded 2D digital dendrimers and the generated data matrix barcode can be read by a common hand-held device.

    • Zhihao Huang
    • , Qiunan Shi
    • , Jiang Guo
    • , Fanying Meng
    • , Yajie Zhang
    • , Yutong Lu
    • , Zhuangfei Qian
    • , Xiaopeng Li
    • , Nianchen Zhou
    • , Zhengbiao Zhang
    •  & Xiulin Zhu
  • Research | | open

    Understanding the dynamics of ring polymers is challenging are despite recent progress, understanding of the nonequilibrium behavior of ring polymers has not yet been achieved. Here, the authors directly observe the flow dynamics of DNA-based rings in semidilute linear polymer solutions using single molecule techniques.

    • Yuecheng Zhou
    • , Kai-Wen Hsiao
    • , Kathryn E. Regan
    • , Dejie Kong
    • , Gregory B. McKenna
    • , Rae M. Robertson-Anderson
    •  & Charles M. Schroeder

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