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A Study on Silane Crosslinking Process of Polypropylene for Enhanced Impact Strength  

Kang, Min-Soo (Material Research Part, Research Team, R&D Center, Hanil E-HWA CO. LTD.)
Park, Sung-Ho (Material Research Part, Research Team, R&D Center, Hanil E-HWA CO. LTD.)
Kim, Ki-Sung (Material Research Part, Research Team, R&D Center, Hanil E-HWA CO. LTD.)
Bae, Jong-Rak (Material Research Part, Research Team, R&D Center, Hanil E-HWA CO. LTD.)
Jeon, Oh-Hwan (Material Research Part, Research Team, R&D Center, Hanil E-HWA CO. LTD.)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.18, no.3, 2010 , pp. 69-73 More about this Journal
Abstract
The melt grafting of unsaturated silanes onto polypropylene (PP) in a twin-screw extruder and crosslinking in hot water were studied to enhance impact strength of polypropylene. The influence of grafting formulations on the melt flow rates of grafted PP and the gel percentages of crosslinked PP was investigated. 3-methacryloylpropyltrimethoxysilane (VMMS) unsaturated silane monomer was used. Benzoyl peroxide, (BPO) and Dicumyl peroxide (DCP) were used as an initiator. When benzoyl peroxide (BPO) was used as an initiator, higher gel percentage and impact strength than those of DCP has been observed. The maximum impact strength was obtained with 0.7 phr of BPO and 2phr of VMMS. The value is 8.7 kgf-cm/cm and it is on a parity with the value of with 20 phr of EOR mixed to PP.
Keywords
Polypropylene; Silane crosslinking; Graft copolymer; Crosslinking;
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