Crosslinking of polyethylene with peroxide and multifunctional monomers during extrusion

✍ Scribed by K.J. Kim; Y.S. Ok; B.K. Kim

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 330 KB
• Volume: 28
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(92)90140-w

✦ Synopsis

In situ crosslinking of HDPE was done using a twin-screw extruder at 230 °. The effects of peroxide(1,3-bis(t-butyl-peroxy-isopropyl)benzene) and coagent [pentaerythritol triacrylate (PETA), triallyl isocyanurate (TAlC)I, alone and together, were studied with regard to the thermal, mechanical, and rheological properties. Crosslinking was obtained with PETA alone as well as peroxide, but not with TAlC alone. When TAlC or PETA was used in combination with peroxide, a synergistic reduction in MI and increase of modulus and impact strength were obtained. The most significant improvement from peroxide or PETA treatment was the impact strength, which was increased over 5-fold with 0.I phr peroxide, and over 7-fold with 0.2 phr PETA.