Chen, Haiming; Liu, Guoming; Qin, Yunpeng; Müller, Alejandro J.; Hou, Jianhui; Wang, Dujin
Structural Transitions in Solution-Cast Films of a New AABB Type Thiophene Copolymer
The structural transitions in solution-cast film of poly (PDCBT) copolymer have been systematically studied by a combination of differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), in situ Fourier transform infrared spectroscopy (FTIR), UV–vis spectroscopy, and in situ wide-angle X-ray…
Structure and crystallization behaviour of syndiotactic polystyrene/layered double hydroxide nanocomposites
Nagendra, Baku; Das, Amit; Leuteritz, Andreas; Gowd, E. Bhoje
Highly dispersed polymer nanocomposites were prepared by solution blending method. The influence of surfactant free LDH particles on the crystallization behavior and flame retardant properties of syndiotactic polystyrene are…
Structure evolution of polyamide (11)’s crystalline phase under uniaxial stretching and increasing temperature
Xiao, Xueliang; Cai, Ziqing; Qian, Kun
Thermal processing of polyamide influences the internal crystalline structure and thereafter the post product mechanical performance. In this article, the crystalline transition of polyamide-11 (PA11) plate under uniaxial stretching and increasing temperature was investigated systematically using in-situ synchrotron X-ray technique. It was discovered that the lamellar slippage, fragmentation and…
Structure, transport and photoconductance of PbS quantum dot monolayers functionalized with a copper phthalocyanine derivative
André, A.; Theurer, C.; Lauth, J.; Maiti, S.; Hodas, M.; Khoshkhoo, M. Samadi; Kinge, S.; Meixner, A. J.; Schreiber, F.; Siebbeles, L. D. A.; Braun, K.; Scheele, M.
We simultaneously surface-functionalize PbS nanocrystals with Cu 4,4′,4′′,4′′′-tetraaminophthalocyanine and assemble this hybrid material into macroscopic monolayers. Electron microscopy and X-ray scattering reveal a granular mesocrystalline structure with strong coherence between the atomic lattice and the superlattice of nanocrystals within each domain. Terahertz spectroscopy and field-effect…
Studies on blends of natural rubber and butadiene rubber containing silica – Organomodified kaolin hybrid filler systems
Raji Vijay, V.; Anitha, A. M.; Ravindranatha Menon, A. R.
Hybrid filler systems consisting of precipitated silica and kaolin modified with a sodium salt of rubber seed oil (SRSO) were studied in blends of natural rubber (NR) and polybutadiene rubber (BR). Substitution of 5–10 phr (parts per hundred rubber) of silica with SRSO modified kaolin imparted lower Mooney viscosity and higher…
Sugar-cane bagasse derived cellulose enhances performance of polylactide and polydioxanone electrospun scaffold for tissue engineering
Ramphul, Honita; Bhaw-Luximon, Archana; Jhurry, Dhanjay
Bagasse is a waste product of sugar extraction from sugar-cane with approximately 30% cellulose content. Cellulose was successfully extracted from sugar-cane bagasse using a modified mercerization-bleaching approach with a 40% yield. Extracted cellulose was converted to cellulose acetate for enhanced electrospinnability and blended with poly-l-Lactide or polydioxanone before solution…
Sulfate dodecyl sodium-induced stability of a model intrinsically disordered protein, bovine casein
Sun, Yang; Zhang, Juntao; Wang, Haibo; Wang, Tingting; Cheng, Hua; Yu, Bo; Oliveira, Cristiano L. P.
With well-known nutritional properties, casein contributes to about 80% of protein content in milk and has been classified as highly intrinsically disordered protein (IDP). In this paper, the sulfate dodecyl sodium (SDS)-induced conformational changes of bovine casein were studied by multi-techniques. Isothermal titration calorimetry (ITC) and differential scanning calorimetry (DSC)…
Supernucleation and Orientation of Poly(butylene terephthalate) Crystals in Nanocomposites Containing Highly Reduced Graphene Oxide
Colonna, Samuele; Pérez-Camargo, Ricardo A.; Chen, Haiming; Liu, Guoming; Wang, Dujin; Müller, Alejandro J.; Saracco, Guido; Fina, Alberto
The ring-opening polymerization of cyclic butylene terephthalate into poly(butylene terephthalate) (pCBT) in the presence of reduced graphene oxide (RGO) is an effective method for the preparation of polymer nanocomposites. The inclusion of RGO nanoflakes dramatically affects the crystallization of pCBT, shifting crystallization peak temperature to higher temperatures and, overall, increasing…
Super-Strong, Super-Stiff Macrofibers with Aligned, Long Bacterial Cellulose Nanofibers
Wang, Sha; Jiang, Feng; Xu, Xu; Kuang, Yudi; Fu, Kun; Hitz, Emily; Hu, Liangbing
With their impressive properties such as remarkable unit tensile strength, modulus, and resistance to heat, flame, and chemical agents that normally degrade conventional macrofibers, high-performance macrofibers are now widely used in various fields including aerospace, biomedical, civil engineering, construction, protective apparel, geotextile, and electronic areas. Those macrofibers with a…
Supertoughened Polylactide Binary Blend with High Heat Deflection Temperature Achieved by Thermal Annealing above the Glass Transition Temperature
Deng, Liang; Xu, Cui; Wang, Xuehui; Wang, Zhigang
Through thermal annealing above the glass transition temperature, a supertoughened binary blend with the highest notched Izod impact strength of 98 KJ/m2 was achieved, which was about 52 times of that of neat polylactide (PLA; 1.9 KJ/m2). The binary blend was composed of biocompatible and biodegradable PLA and ethylene–acrylic ester–glycidyl…