Macromolecular Chemistry and Physics
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Materials Science Weekly Newsletter
Recently Published Articles
- Concurrent Oxidation of Alcohols and the Passerini Three-Component Polymerization for the Synthesis of Functional Poly(ester amide)s
Xiao-Wei Kan, Xin-Xing Deng, Fu-Sheng Du and Zi-Chen Li
Article first published online: 29 JUL 2014 | DOI: 10.1002/macp.201400264
A variety of functional poly(ester amide)s are prepared in a one-pot fashion via polymerization of 1,6-diisocyanohexane, 1,6-hexanedioic acid, and different functional alcohols in the presence of o-iodoxybenzoic acid. This polymerization involves the cascade oxidation of alcohols by o-iodoxybenzoic acid and the Passerini three-component polymerization of the formed aldehydes with the diacid and diisocyanide.
- Coexisting Straight, Radial, and Banded Lamellae on the Six Corners of Hexagon-Shaped Spherulites in Poly(l-Lactide)
Hikmatun Ni'mah and Eamor M. Woo
Article first published online: 29 JUL 2014 | DOI: 10.1002/macp.201400211
Unique novel hexa-stalks plus a ring-banded pattern in the final spherulite morphology are observed in poly(l-lactide) (PLLA) that is melt crystallized at Tc = 110 °C. The mixed morphology comprises ring-bands filling in the space among the straight hexa-stalks, which collectively originate from a central hexagonal core crystal. The variation and details of the lamellar arrangement are proven to induce this novel morphology. The packing of lamellae in the finally grown PLLA spherulite is observed to be influenced by the initial crystal geometry (hexagonal or sheaf-like nuclei cores).
- Transition-Metal-Catalyzed Chain-Growth Polymerization of 1,4-Diethynylbenzene into Microporous Crosslinked Poly(phenylacetylene)s: the Effect of Reaction Conditions
Eva Slováková, Arnošt Zukal, Jiří Brus, Hynek Balcar, Libor Brabec, Dmitrij Bondarev and Jan Sedláček
Article first published online: 29 JUL 2014 | DOI: 10.1002/macp.201400198
Conjugated porous polyacetylene-type networks result from chain-growth polymerization of 1,4-diethynylbenzene with Rh insertion catalysts. Networks prepared at room temperature prevailingly contain micropores; networks prepared at 75 °C are micro-/mesoporous. Additional crosslinking is achieved by thermal post-polymerization treatment of networks.
- Tandem Action of SNS–Cr and CGC–Ti in Preparation of Ethylene–1-Hexene Copolymers from Ethylene Feedstock
Song Guo, Hong Fan, Zhiyang Bu, Bo-Geng Li and Shiping Zhu
Article first published online: 28 JUL 2014 | DOI: 10.1002/macp.201400290
Ethylene–1-hexene copolymers, ranging from semicrystalline linear low-density polyethylene (LLDPE) to completely amorphous polyethylene (PE), are prepared from ethylene-only stock by the tandem polymerization of SNS–Cr and CGC–Ti. 1-Hexene content in the resulting copolymers can be adjusted by varying the Cr–Ti molar ratio and/or applying a short period of pre-trimerization. Copolymers with high 1-hexene content up to 15 mol% are obtained.
- Solvent-Assisted Orientation of Poly(3-hexylthiophene)-Functionalized CdSe Nanorods Under an Electric Field
Sirinya Chantarak, Feng Liu, Todd Emrick and Thomas P. Russell
Article first published online: 28 JUL 2014 | DOI: 10.1002/macp.201400188
The long-range vertical ordering of high aspect ratio CdSe nanorods is described. Multiple layers of close-packed hexagonal nanorod arrays are achieved through the application of an electric field during nanorod assembly. Vertically oriented CdSe nanorods, surface-functionalized with polythiophene, holds potential for improving charge transport in hybrid bulk heterojunction solar cells.