Polymer International

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Poly(butylene terephthalate)–clay nanocomposites prepared by melt intercalation: morphology and thermomechanical properties
Polymer International - Tập 54 Số 2 - Trang 348-353 - 2005
Young‐Wook Chang, Suksoo Kim, Youngbin Kyung
AbstractNanocomposites based on poly(butylene terephthalate) (PBT) and an organoclay (Cloisite 30B) were prepared by melt blending using a twin‐screw extruder. Two kinds of PBTs, ie PBT‐A and PBT‐B, with different inherent viscosities (ηinh), were used for this study (ηinh of PBT‐A and PBT‐B were 0.74 and 1.48, respectively). Dispersion of the clay layers in the PBT nanocomposites was characterize... hiện toàn bộ
Swelling behaviour of a new kind of polyampholyte hydrogel composed of dimethylaminoethyl methacrylate and acrylic acid
Polymer International - Tập 53 Số 1 - Trang 33-36 - 2004
Maolin Zhai, Yanfeng Chen, Min Yi, Hongfei Ha
AbstractPoly[(dimethylaminoethyl methacrylate)‐co‐(acrylic acid)] [poly(DMAEMA‐co‐AAc)] hydrogels have been synthesized by UV‐induced copolymerization of dimethylaminoethyl methacrylate (DMAEMA) and acrylic acid monomer. The effects of pH and ionic strength on the swelling behaviour of poly(DMAEMA‐co‐AAc) hydrogels were investigated in detail. It was found that there is minimal equilibrium swellin... hiện toàn bộ
Effect of annealing on the microstructure and mechanical properties of polypropylene with oriented shish‐kebab structure
Polymer International - Tập 61 Số 2 - Trang 252-258 - 2012
Hongwei Bai, Hua Deng, Qin Zhang, Ke Wang, Qiang Fu, Zhijie Zhang, Yongfeng Men
AbstractAnnealing is thought to be an effective method to promote chain rearrangement in semicrystalline polymers and improve their physical properties. However, little attention has been paid to the annealing of flow‐oriented semicrystalline polymers despite its importance in polymer processing. In this work, the microstructural evolution of injection‐moulded polypropylene with an oriented shish‐... hiện toàn bộ
Properties of poly(ethylene terephthalate) containing epoxy‐functionalized polyhedral oligomeric silsesquioxane
Polymer International - Tập 54 Số 1 - Trang 47-53 - 2005
Kwan Han Yoon, Malcolm B. Polk, Jae Hong Park, Byung Gil Min, David A. Schiraldi
AbstractPoly(ethylene terephthalate) (PET) containing epoxy‐functionalized polyhedral oligomeric silsesquioxane (POSS) was prepared by melt‐mixing and in situ polymerization methods. The melt‐mixed composite showed phase separation while the in situ polymerized composite did not, based on SEM characterization. During melt mixing, the reaction between the epoxy groups of POSS and hydroxyl groups of... hiện toàn bộ
Thermal and mechanical properties of poly(ε‐caprolactone)/polyhedral oligomeric silsesquioxane nanocomposites
Polymer International - Tập 62 Số 1 - Trang 64-70 - 2013
Kang Suk Lee, Young‐Wook Chang
AbstractPoly(ε‐caprolactone) (PCL)/trisilanolphenyl polyhedral oligomeric silsesquioxane (TspPOSS) nanocomposites were prepared by solution mixing followed by film casting. Wide‐angle X‐ray diffraction and field‐emission scanning electron microscopy observations showed that the POSS molecules formed crystal domains and dispersed uniformly on the nanoscale in the PCL matrix. Fourier transform infra... hiện toàn bộ
Preparation and characterization of styrene/styryl–polyhedral oligomeric silsesquioxane hybrid copolymers
Polymer International - Tập 57 Số 12 - Trang 1351-1356 - 2008
Hexin Zhang, H. K. LEE, Young-Jun Shin, Keun‐Byoung Yoon, Seok‐kyun Noh, Dong‐ho Lee
AbstractBACKGROUND: Organic–inorganic nanocomposites were prepared by copolymerization of various monomers and polyhedral oligomeric silsesquioxane (POSS) derivatives. Preliminary results showed that styrene/styryl–POSS copolymers could be obtained using CpTiCl3 catalyst. In the work reported here, the copolymerization of styrene and styryl‐substituted POSS was studied in detail for a more effecti... hiện toàn bộ
Synthesis and characterization of polyimide/polyhedral oligomeric silsesquioxane nanocomposites containing quinolyl moiety
Polymer International - Tập 61 Số 8 - Trang 1344-1352 - 2012
B. Govindaraj, P. R. Sundararajan, M. Sarojadevi
AbstractA series of functional polyhedral oligomeric silsesquioxane (POSS)/polyimide (PI) nanocomposites were prepared using a two‐step approach. First, octa(aminophenyl)silsesquioxane (OAPS) was mixed with poly(amic acid) (PAA) prepared by reacting bis(4‐amino‐3,5‐dimethylphenyl)‐3‐quinolylmethane and 3,3′,4,4′‐benzophenonetetracarboxylic dianhydride. Second, the resulting solution was subjected ... hiện toàn bộ
Thermal polymerization of thiol–ene network‐forming systems
Polymer International - Tập 56 Số 12 - Trang 1572-1579 - 2007
Wayne D. Cook, Fei Chen, Derek W Pattison, Peyton Hopson, Mathieu Beaujon
AbstractThe thermal polymerization of a tetrafunctional thiol (PETMP) and divinyl ether (TEGDVE) was monitored by temperature‐ramping differential scanning calorimetry (DSC) and the effects of inhibitor type and concentration, oxygen inhibition and initiator type were studied. The incorporation of inhibitors was required to produce a stable system at room temperature. Butylated hydroxytoluene (BHT... hiện toàn bộ
On the phase behaviour of organic semiconductors
Polymer International - Tập 61 Số 6 - Trang 866-873 - 2012
Natalie Stingelin
AbstractThe physical organisation, from the molecular to the macroscale, of functional organic matter such as polymer semiconductors can profoundly affect the properties and features of the resulting architectures and their consequent performance when used as active layers in organic optoelectronic devices, including organic thin‐film field‐effect transistors, organic light‐emitting diodes or orga... hiện toàn bộ
Porous polyurethane foams based on recycled poly(ethylene terephthalate) for oil sorption
Polymer International - Tập 62 Số 1 - Trang 116-126 - 2013
Ayman M. Atta, Witold Brostow, Tea Datashvili, Rasha A. El‐Ghazawy, Haley E. Hagg Lobland, Abdulraheim M.A. Hasan, J.M. Pérez
AbstractIn using recycled poly(ethylene terephthalate) (PET) as a petroleum sorbent we tried to achieve two important objectives simultaneously. PET waste was glycolized using trimethylolpropane (TMp) or pentaerytheritol (PEr) to produce suitable polyol oligomers for polyurethane (PU) foams. The glycolysis was carried out in the presence of manganese acetate as a catalyst under normal pressure in ... hiện toàn bộ
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