含聚环氧乙烷嵌段极性化SIS的制备-化学工程专业论文.docxVIP

含聚环氧乙烷嵌段极性化SIS的制备Preparation 含聚环氧乙烷嵌段极性化SIS的制备 Preparation of Polar SIS with Polyethylene Oxide Block Abstract Thermoplastic elastomer(TPE)is polymer material between plastic and rubber，and attracted widespread attention in the industry．Styrene—Isoprene—Styrene(SIS)block copolymer has been one of the most widely used and the largest output of varieties in TPE materials，but due to the characteristics ofthe molecular structure ofSIS itself,leading to small polarity,and having a poor compatibility and low adhesion with PVC，metal，cloth，and o血er polar materials， leading to many limitations in the application，therefore，it must be carried out SIS polar modification． Most current studies of SIS polar modification work iS the ofthe characteristics ofthe presence of double bond in PI segment，by epoxidation，sulfonation and graft modified SIS， but the modified process is very complex．This paper intends to modify SIS by introducing PEO block the end of the SIS chain，and to develop new type of poly(ethylene oxide— isoprene-ethy’lene oxide)TPE with low processing temperature，the main contents are follows： Firstly,using aniomc polymerization process，the SIS containing PEO block WaS synthesized by one．pot method with cyclohexane as a solvent．n-BuLi homemade double 1ithium an initiator,i．Bu3Al additive．And the structure of the product were characterized，the results showed that，by FT．IR and 1H-NMR analysis，SIS0 and 0SIS0 block copolymers were synthesized successfully．Using 1H-NMR and GPC accurately calculate the PEO content and the molecular weight．The molecular weight of product can easy control and the distribution iS very narrow，and the experimental procedure iS simple，which solved the complex defects of the traditional polar modification process． Secondly，the effects of the introduction of PEO block the thermal properties，polarity， dielectric properties。mechanical properties and adhesion performance hot melt pressure sensitive adhesive of SIS block copolymer were studied．The resu