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Volumn 288, Issue 5474, 2000, Pages 2187-2190

High-strength welds in metallocene polypropylene/polyethylene laminates

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSIS; CRYSTALLIZATION; PLASTIC LAMINATES; POLYETHYLENES; POLYPROPYLENES; WELDS;

EID: 0034705627     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.288.5474.2187     Document Type: Article
Times cited : (94)

References (33)
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    • A. Jebens, "Polypropylene resins," Chemical Economics Handbook (CEH) Report (SRI International, Menlo Park, CA, 1997) (available at http://ceh.sric.sri.com/ Public/Reports).
    • (1997) Chemical Economics Handbook
    • Jebens, A.1
  • 3
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    • High density polyethylene resins
    • CEH Report SRI International, Menlo Park, CA
    • A. Jebens, "High density polyethylene resins," Chemical Economics Handbook (CEH) Report (SRI International, Menlo Park, CA, 1999) (available at http:// ceh.sric.sri.com/Public/Reports).
    • (1999) Chemical Economics Handbook
    • Jebens, A.1
  • 10
    • 0034695625 scopus 로고    scopus 로고
    • T. R. Younkin et al., Science 287, 460 (2000).
    • (2000) Science , vol.287 , pp. 460
    • Younkin, T.R.1
  • 11
    • 0343922159 scopus 로고    scopus 로고
    • U.S. Patent 5,008,204 (1991)
    • F. C. Stehling, U.S. Patent 5,008,204 (1991).
    • Stehling, F.C.1
  • 12
    • 0343050530 scopus 로고    scopus 로고
    • U.S. Patent 5,064,802 (1991)
    • J. C. Stevens, U.S. Patent 5,064,802 (1991).
    • Stevens, J.C.1
  • 16
    • 0011349392 scopus 로고
    • and gel permeation chromatography (GPC)
    • w ≈ 30,000 daltons) and highly branched material (more than 14% branched repeat units) as determined by temperature rising elution fractionation (TREF) [L. Wild, T. R. Ryle, D. C. Knobeloch, I. R. Peat, J. Polym. Sci. Polym. Phys. Ed. 20, 441 (1982)] and gel permeation chromatography (GPC).
    • (1982) J. Polym. Sci. Polym. Phys. Ed. , vol.20 , pp. 441
    • Wild, L.1    Ryle, T.R.2    Knobeloch, D.C.3    Peat, I.R.4
  • 22
    • 0343050531 scopus 로고    scopus 로고
    • note
    • Linear dynamic mechanical spectroscopy measurements indicate that all PE and iPP polymer chain relaxation times are less than 0.1 s at the laminate molding temperature. Hence, the 10-min molding time far exceeds the time required to achieve an equilibrium interfacial composition profile.
  • 30
    • 0342616321 scopus 로고    scopus 로고
    • note
    • Because molecular conformations are perturbed by crystallization, PE/iPP weld strength may be affected by laminate cooling rate, as shown by Lin et al. (32). Experiments with mPE/miPP laminates confirm that peel strength decreases with decreasing cooling rate. This is not a consequential factor with glassy polymers because vitrification is essentially uncorrelated with chain conformation.
  • 31
    • 0343050529 scopus 로고    scopus 로고
    • note
    • Peel tests on laminated films of Ziegler-Natta iPP and ethylene-propylene (block) copolymer (32) resulted in adhesive strengths comparable to those reported here for the Ziegler-Natta polymers, that is, more than an order of magnitude lower than the failure strength of the all-metallocene materials.
  • 33
    • 0343050528 scopus 로고    scopus 로고
    • note
    • Financial support was provided to the University of Minnesota by the Exxon Chemical Company. TEM and x-ray scattering measurements were conducted at the University of Minnesota Materials Research Science and Engineering Center-supported Institute of Technology Characterization Facility.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.