Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (572 KB)

Title: Phase structure and properties of poly(ethylene terephthalate)/polyethylene based on recycled materials

Author: Lei, Yong; Wu, Qinglin; Clemons, Craig M.; Guo, Weihong.;

Date: 2009

Source: Journal of applied polymer science. Vol. 113, no. 3 (Aug. 5, 2009): pages 1710-1719.

Publication Series: Miscellaneous Publication

Description: Blends based on recycled high density polyethylene (R-HDPE) and recycled poly(ethylene terephthalate) (R-PET) were made through reactive extrusion. The effects of maleated polyethylene (PE-g-MA), triblock copolymer of styrene and ethylene/butylene (SEBS), and 4,40-methylenedi(phenyl isocyanate) (MDI) on blend properties were studied. The 2% PE-g-MA improved the compatibility of R-HDPE and R-PET in all blends toughened by SEBS. For the R-HDPE/R-PET (70/30 w/w) blend toughened by SEBS, the dispersed PET domain size was significantly reduced with use of 2% PE-g-MA, and the impact strength of the resultant blend doubled. For blends with R-PET matrix, all strengths were improved by adding MDI through extending the PET molecular chains. The crystalline behaviors of R-HDPE and R-PET in one-phase rich systems influenced each other. The addition of PE-g-MA and SEBS consistently reduced the crystalline level (χc) of either the R-PET or the R-HDPE phase and lowered the crystallization peak temperature (Τc) of R-PET. Further addition of MDI did not influence R-HDPE crystallization behavior but lowered the χc of R-PET in R-PET rich blends. The thermal stability of R-HDPE/R-PET 70/30 and 50/50 (w/w) blends were improved by chain-extension when 0.5% MDI was added.

Keywords: Polyethylene, recycling, blends, polyethylene terephthalate, recycled products, extrusion process, injection molding of plastics, butene, termperature, composite materials, mechanical properties, crystallization, HDPE, ethylenes, SEBS, strength, styrenes, thermal degradation

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Lei, Yong; Wu, Qinglin; Clemons, Craig M.; Guo, Weihong 2009. Phase structure and properties of poly(ethylene terephthalate)/high-density polyethylene based on recycled materials. Journal of applied polymer science. Vol. 113, no. 3 (Aug. 5, 2009): pages 1710-1719.


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.