期刊
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING
卷 57, 期 12, 页码 1209-1224出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/03602559.2017.1373404
关键词
Crosslinking; long-chain branched; polypropylene; structure-property relations
资金
- Agencia Nacional de Promocion Cientifica y Tecnologica [PICT 2013-1108]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas [112-201301-00708-CO]
- Universidad Nacional del Sur [24/M145]
Long-chain branched polypropylenes were synthesized from a maleic anhydride grafted polypropylene (PPg). Different levels of branching were generated by reactive processing using four chain-linking agents: glycerol, 1,4-butanediol, 1,4-phenylenediamine, and the epoxy resin bisphenol-A diglycidyl ether. The results from Fourier transform infrared and size-exclusion chromatography confirm the grafting of the chain-linking agents onto grafted polypropylene and the generation of long-chain branches. In addition, the rheological and morphological results show that 1,4-phenylenediamine produces the largest increment of branching at significantly lower concentrations than the other chain-linking agents. Moreover, 1,4-phenylenediamine gives place to branched polypropylenes with narrower distribution of molecular structures. [GRAPHICS] .
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