Macromolecular Chemistry and Physics
Copyright © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Materials Science Weekly Newsletter
Recently Published Articles
- Enhanced Crystallization Rate of Poly(l-lactide) Mediated by a Hydrazide Compound: Nucleating Mechanism Study
Qian Xing, Rongbo Li, Xia Dong, Faliang Luo, Xiao Kuang, Dujin Wang and Liaoyun Zhang
Article first published online: 1 APR 2015 | DOI: 10.1002/macp.201500002
The crystallization rate of poly(l-lactide) (PLLA) has been enhanced effectively by the addition of a hydrazide compound, tetramethylenedicarboxylic di (2-hydroxybenzohydrazide) (TMBH). It has been revealed that TMBH can promote the skeletal conformational ordering of PLLA via possible hydrogen bonding interaction, which thus accelerates the nucleation kinetics of PLLA and the subsequent formation of 103 helix structure.
- Revisiting Benzylidenequinolinylnickel Catalysts through the Electronic Effects on Catalytic Activity by DFT Studies
Wenhong Yang, Jun Yi and Wen-Hua Sun
Article first published online: 1 APR 2015 | DOI: 10.1002/macp.201500028
Ethylene Rreactivity catalytic activities for a series of nickel complex catalysts are evaluated by density functional theory methods. The calculations indicated that, besides the correlation with effective net charges on nickel atom, the energy gaps between the complex and ethylene, and the energy difference values between the two spin states, also present relationship with activity.
- Synthesis of Telechelic and Three-Arm Polytetrahydrofuran-block-amylose
Rachmawati Rachmawati, Hilde D. de Gier, Albert J. J. Woortman and Katja Loos
Article first published online: 30 MAR 2015 | DOI: 10.1002/macp.201500018
Telechelic and three-arm polytetrahydrofuran-block-amylose can be synthesized by coupling telechelic and three-arm polytetrahydrofuran with maltoheptaose, followed by enzymatic polymerization to elongate the saccharide blocks. The covalently attached amylose in these block copolymers can form inclusion complexes with suitable guest molecules which leads to a facile approach in modifying block copolymers to result in highly ordered supramolecules.
- Surface Functionalization of Electrospun Poly(butylene terephthalate) Fibers by Surface-Initiated Radical Polymerization
Yuji Higaki, Hirofumi Kabayama, Di Tao and Atsushi Takahara
Article first published online: 26 MAR 2015 | DOI: 10.1002/macp.201500066
A facile surface modification procedure for electrospun poly(butylene terephthalate) (PBT) fibers by surface-initiated atom transfer radical polymerization (SI-ATRP) is reported. Initiators were introduced through aminolysis and chemical vapor adsorption. SI-ATRP was subsequently carried out to prepare a polymer-grafted layer at the PBT fiber surface without altering the fiber geometry.
- Solvent and Steric Hindrance Effects of Bulky Poly(9,9-diarylfluorene)s on Conformation, Gelation, Morphology, and Electroluminescence
Bin Liu, Jinyi Lin, Zhenfeng Lei, Mingli Sun, Linghai Xie, Wei Xue, Chengrong Yin, Xinwen Zhang and Wei Huang
Article first published online: 23 MAR 2015 | DOI: 10.1002/macp.201400568
The evolution from solution to film of bulky poly(9,9-diarylfluorene)s (PFs) is studied. The gelation behaviors that are demonstrated in 1,2-dichloroethane (DCE) solutions feature emission of 470 nm, and β-phase. Obvious solvent and steric hindrance effects happen in the morphology in annealing thin films and g-band in photoluminescence (PL) and electroluminescence (EL), demonstrating that the less solvent effects, the more stable the chain conformation and morphology.