畏缩
发表于 2025-3-23 10:17:38
http://reply.papertrans.cn/89/8804/880367/880367_11.png
bisphosphonate
发表于 2025-3-23 14:11:39
Thermal Properties of Polymers,Linear amorphous polymers are glasslike at low temperatures and become leathery at temperatures slightly higher than the glass transition temperature (T.). These leathery polymers become rubbery at slightly higher temperatures, and crystalline polymers melt at the melting point (..).
套索
发表于 2025-3-23 21:51:00
Solubility,The first step in the solution process of a polymeric material by a good solvent is a swelling. Providing the solvent is a good solvent, the intermolecular forces in linear and branched polymers are broken and the polymer dissolves.
连接
发表于 2025-3-23 22:38:30
Effect of Additives on Polymers,The properties of polymers may be improved by the presence of appropriately selected additives. With the exception of some cast plastics, such as polymethyl methacrylate (PMMA), and some fibers, such as unpigmented cotton, most commercial polymers are mixtures of the polymer with one or more additives.
adulterant
发表于 2025-3-24 04:39:24
Aliphatic Polymers with Heteroatom Chains,The polymer molecules described previously were catenated carbon chains with various pendant groups. The polymer molecules described in this chapter have other atoms in the polymer chain, either in addition to or in place of the carbon atoms.
性学院
发表于 2025-3-24 07:22:07
Selection of Polymers for Special Applications,Because of their different structures, polymers may be used for a wide variety of applications, ranging from enhanced oil recovery to components for aerospace vehicles. Fortunately, one can predict the properties of polymers, to some extent, from a knowledge of their structure.
comely
发表于 2025-3-24 13:40:57
http://reply.papertrans.cn/89/8804/880367/880367_17.png
免除责任
发表于 2025-3-24 18:07:21
http://reply.papertrans.cn/89/8804/880367/880367_18.png
Focus-Words
发表于 2025-3-24 21:03:12
after this comes the question: What have I made, and for what is it good? This leads to the important topic of the structure-property relations to which this book is devoted. Polymers are very large and very complicated systems; their character ization has to begin with the chemical composition, co
镀金
发表于 2025-3-25 02:08:29
Diffusion and Permeation of Gas and Vapors in Polymers,e dissolution of a polymer in a solvent; the plasticization of a polymer, such as polyvinyl chloride (PVC); and the passing of gases through films, is dependent on random jumps and hole filling by small diffusate molecules.