However, these oligomers have very different electronic properties with band gaps below 0.2 eV for the chain [H2PBH2]15 and more than 5 eV for the ring isomer [H2PEH2]15. The MOs in the ring oligomers are highly delocalized, while, for the chain isomers, HOMO and LUMO are localized at...
Why Different Surface Area to Volume Ratios and Masses are Important and How They Relate to Thermoregulation. Data and references are provided to demonstrate the efficacy of titanates and zirconates in foamed unfilled and filled polymers with an emphasis on why the... C Freeman,D Frohrip,B Hye...
Polymers have gained a unique position in modern materials technology for a number of quite different reasons. The development of the inflatable rubber tyre in modern transport would not have been possible without the use of natural, and later synthetic, rubbers as the energy absorbing components. ...
Are nucleotides monomers or polymers? Explain. Why are DNA and RNA called acids? Why are proteins important in your body and how to make a protein from DNA? Why is DNA stable but RNA is not? Why is DNA said to have a structure that resembles a ladder? When and why does DNA replicate?
ES fiber is usually composed of two polymers with different melting points, which are combined into one fiber through a special spinning process. Taking PE/PET bicomponent as an example, its typical structure includes: PE outer layer: has a low melting point (usually about 100-120℃), which ...
Are thermosetting polymers brittle? The thermosetting materials exhibit much better thermal and mechanical properties than those of the thermoplastics; however theirhigh brittleness limitedtheir applications especially in fiber reinforced composites. What makes thermoplastic brittle?
What are lipids? How and why are proteins added to sugars? How is energy transferred to foods fried in deep-fat? What are the three types of atoms that compose sugars and lipids? How are proteins similar to starches? A. Both are polymers. B. Both can be consumed and used as energy...
Fibers with a variety of cross sectional shapes and sizes were produced from different polymers. The diameter of these fibers was in the range of 0.05 ... J Doshi,DH Reneker - 《Journal of Electrostatics》 被引量: 3803发表: 1995年 Doping semiconductor nanocrystals Doping--the intentional introd...
ais used to determine the orientation of unit cell or chain axes orientation in crystalline structrue of polymers. 在聚合物水晶structrue使用确定单位晶格或链子轴取向的取向。[translate] athe perfect "rulers"to measure angstrom distances are X-rays. "测量埃距离的完善的“统治者是X-射线。[translate]...
aPolymers Division 聚合物分部[translate] ateen burg tube 青少年的城镇管[translate] amodule panel glovebox LL A.F 模块盘区手套箱LL A.F[translate] ai was embarrassed to be seen with my father 我困窘看见与我的父亲[translate] aswallow your pride and accept that you're wrong. It's not givi...