The Effect of Peroxide Cross-Linking on the Properties of Low-Density Polyethylene

Low-density polyethylene (LDPE) was chemically cross-linked with various amounts of dicumyl peroxide (DCP). The cross-link density, determined by Flory-Rehner theory, showed an increase with increasing DCP. The gel content, densities of cross-linked LDPE, thermal stability, crystallization, melting...

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Published in:Journal of macromolecular science. Physics 2014-01, Vol.53 (1), p.67-77
Main Authors: Liu, Shan-Qiu, Gong, Wei-Guang, Zheng, Bai-Cun
Format: Article
Language:English
Subjects:
Applied sciences
Chemical reactions and properties
cross-linking
Crosslinking, vulcanization
crystallinity
Exact sciences and technology
Organic polymers
peroxide
Physicochemistry of polymers
polyethylene
properties
weight loss
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cited_by cdi_FETCH-LOGICAL-c374t-4d1d4fb490c3afffcb9458415b342c14a5485ac4955d0cd9d6720ae16eb6a8b43
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description Low-density polyethylene (LDPE) was chemically cross-linked with various amounts of dicumyl peroxide (DCP). The cross-link density, determined by Flory-Rehner theory, showed an increase with increasing DCP. The gel content, densities of cross-linked LDPE, thermal stability, crystallization, melting behavior, and tensile properties were studied. The results showed a new finding about the change of weight loss after cross-linking; with increase in temperature, the weight loss showed an increase below the temperature of about 450°C and then showed a decrease at temperatures from about 450°C to 500°C after being cross-linked. The crystallinity, melting point, crystallization temperature, and elongation at break decreased with the increase in DCP. However, the maximum tensile stress increased with the increase in DCP, and the cross-linked samples showed a rubber-like behavior with no flow.
doi_str_mv 10.1080/00222348.2013.789360
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subjects Applied sciences
Chemical reactions and properties
cross-linking
Crosslinking, vulcanization
crystallinity
Exact sciences and technology
Organic polymers
peroxide
Physicochemistry of polymers
polyethylene
properties
weight loss
title The Effect of Peroxide Cross-Linking on the Properties of Low-Density Polyethylene
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