Skip to Main Content
Effects of silane on the properties of wood-plastic composites with polyethylene-polypropylene blends as matricesAuthor(s): Craig M. Clemons; Ronald C. Sabo; Michael L. Kaland; Kolby C. Hirth
Source: Journal of applied polymer science. Vol. 119, no. 3 (Feb. 5, 2011): p. 1398-1409.
Publication Series: Scientific Journal (JRNL)
Download Publication (681.69 KB)
DescriptionThe influence of 3-(trimethoxysilyl)propyl methacrylate and benzoyl peroxide on gel content, crystallinity, and mechanical performance of unfilled PP-PE blends, and their composites with wood was investigated. All materials were compounded in a twin screw extruder and then injection molded. Specimens were then exposed to high-humidity and elevated temperature in a humidity chamber to cross-link any unhydrolyzed silane. Adding wood to the PE-PP blends, increased premature cross-linking but also increased gel contents. However, the gel contents of the composites were still low. The PP component did not appear to cross-link well and our gels were almost entirely HDPE. Fourier Transfer Infrared (FTIR) spectra provided additional evidence that TMSPM is grafted and cross-linked in unfilled PE-PP blends. Unfortunately, the spectra of wood composites proved difficult to interpret because of the complexity and overlap of the FTIR spectra of the wood. The HDPE component annealed when exposed to high-humidity and elevated temperature, although less so in samples with high-gel contents, presumably because of the decreased mobility. Annealing influenced mechanical performance, especially increasing moduli. Adding peroxide and silane appeared to improve adhesion between the wood flour and matrix in the composites but had little effect on energy absorbed during high-speed puncture tests.
- 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.
CitationClemons, Craig M.; Sabo, Ronald C.; Kaland, Michael L.; Hirth, Kolby C. 2011. Effects of silane on the properties of wood-plastic composites with polyethylene-polypropylene blends as matrices. Journal of applied polymer science. Vol. 119, no. 3 (Feb. 5, 2011): p. 1398-1409.
KeywordsComposite materials, mechanical properties, injection molding of plastics, thermoplastic composites, plastics, extrusion, wood-plastic composites, silane, testing, extrusion process, crosslinking, polyethylene, matrices, polypropylene, temperature, humidity, Fourier transform infrared spectroscopy, spectrum analysis, adhesion, peroxides, wood flour, wood plastic materials, crystallinity, biocomposites, silanes, benzoyl peroxide, HDPE, high density polyethylene, reactive extrusion
- The effects of different silane crosslinking approaches on composites of polyethylene blends and wood flour
- Elastomer modified polypropylene–polyethylene blends as matrices for wood flour–plastic composites
- Durability and mechanical properties of silane cross-linked wood thermoplastic composites
XML: View XML