CEDE
发表于 2025-3-25 03:48:16
Chemical Resistance of Polymers,with terminal hydroxyl and carboxyl groups is essentially independent of the size of the molecules. Thus it is customary to assume that the rates of most reactions of organic molecules are similar regardless of the size of the molecule.
custody
发表于 2025-3-25 07:30:57
Polymeric Hydrocarbons with Pendant Groups,roup in PS also increases the intermolecular forces because of its weak polarity. However, the kinetic energy at higher temperatures exceeds the weak intermolecular forces, so this commercial polymer is a readily moldable thermoplastic.
做作
发表于 2025-3-25 12:32:08
High-Performance Polymers,nconjugated diene), and Neoprene, which play a vital role in engineering, and a host of classic thermosets should also be considered high-performance polymers. The properties of other high-performance polymers are described in this chapter.
extract
发表于 2025-3-25 17:35:15
Chemical Structure of Polymers,ose and starch, have been utilized for food, shelter, and clothing for thousands of years. Cellulose, polyisoprene, and shellac were converted to useful man-made plastics, fibers, and elastomers in the 19th century, but these conversions were based primarily on empirical knowledge.
Radiation
发表于 2025-3-25 23:43:00
http://reply.papertrans.cn/89/8804/880367/880367_25.png
儿童
发表于 2025-3-26 00:22:06
http://reply.papertrans.cn/89/8804/880367/880367_26.png
Meager
发表于 2025-3-26 05:18:31
http://reply.papertrans.cn/89/8804/880367/880367_27.png
negligence
发表于 2025-3-26 09:15:55
http://reply.papertrans.cn/89/8804/880367/880367_28.png
窝转脊椎动物
发表于 2025-3-26 16:24:20
Chemical Resistance of Polymers,chemical resistance of organic polymers would be difficult. Fortunately, Nobel laureate Paul Flory found that the rate of esterification of molecules with terminal hydroxyl and carboxyl groups is essentially independent of the size of the molecules. Thus it is customary to assume that the rates of m
SLING
发表于 2025-3-26 19:21:55
Properties of Polyolefins,e (PP), polyisobutylene (PIB), poly-1-butene (PB), copolymers of ethylene and propylene (EP), and proprietary copolymers of ethylene and alpha olefins. Since all these polymers are aliphatic hydrocarbons, the amorphous polymers are soluble in aliphatic hydrocarbon solvents with similar solubility pa