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Additive-like amoun...
Additive-like amounts of HDPE prevent creep of molten LDPE: Phase-behavior and thermo-mechanical properties of a melt-miscible blend
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- Andersson, Mattias, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Hynynen, Jonna, 1987 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Andersson, Mats, 1966 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Hagstrand, Per Ola (författare)
- Borealis GmbH
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- Gkourmpis, Thomas (författare)
- Borealis GmbH
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- Müller, Christian, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2016-10-26
- 2017
- Engelska.
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Ingår i: Journal of Polymer Science, Part B: Polymer Physics. - : Wiley. - 1099-0488 .- 0887-6266. ; 55:2, s. 146-156
- Relaterad länk:
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http://dx.doi.org/10...
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Low-density polyethylene (LDPE) is the preferred type of polyolefin for many medical and electrical applications because of its superior purity and cleanliness. However, the inferior thermo-mechanical properties as compared to, for example, high-density polyethylene (HDPE), which arise because of the lower melting temperature of LDPE, constitute a significant drawback. Here, we demonstrate that the addition of minute amounts of HDPE to a LDPE resin considerably improves the mechanical integrity above the melting temperature of LDPE. A combination of dynamic mechanical analysis and creep experiments reveals that the addition of as little as 1 to 2 wt% HDPE leads to complete form stability above the melting temperature of LDPE. The investigated LDPE/HDPE blend is found to be miscible in the melt, which facilitates the formation of a solid-state microstructure that features a fine distribution of HDPE-rich lamellae. The absence of creep above the melting temperature of LDPE is rationalized with the presence of tie chains and trapped entanglements that connect the few remaining crystallites.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- thermo-mechanical properties
- creep
- tie chains
- miscible polyethylene blend
- phase behavior
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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