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Title: The morphology of blends of linear and branched polyethylenes in solid state by SANS

Abstract

In a previous paper, the authors have shown how small-angle neutron and X-ray scattering (SANS, SAXS) can be used to determine the melt compatibility of different polyolefins, including high-density (HD), low-density (LD), and linear low density (LLD) polyethylene. Such blends have attained widespread commercial applications, though the understanding of the mechanical and melt-flow properties of such blends has hitherto been handicapped by the absence of a consensus concerning the degree of mixing of the components, both in the melt and solid states. Recent SANS data indicate that for HDPE/LDPE blends, the melt is homogeneous for all compositions after proper accounting for H/D isotope effects. In this publication the authors use complementary SANS, DSC, and SAXS to examine the types of morphologies and the different degrees of phase separation which may arise via crystallization effects on cooling from a homogeneous melt.

Authors:
;  [1]; ;  [2]
  1. Oak Ridge National Lab., TN (United States)
  2. Florida State Univ., Tallahassee, FL (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
34328
Report Number(s):
CONF-950402-5
ON: DE95008675; TRN: AHC29511%%38
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Technical Report
Resource Relation:
Conference: 209. American Chemical Society (ACS) national meeting, Anaheim, CA (United States), 2-6 Apr 1995; Other Information: PBD: [1995]
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; POLYETHYLENES; MORPHOLOGY; SMALL ANGLE SCATTERING; MIXTURES; BULK DENSITY; CALORIMETRY; PHASE STUDIES; SAMPLE PREPARATION; DATA ANALYSIS; EXPERIMENTAL DATA

Citation Formats

Wignall, G.D., Londono, J.D., Alamo, R.G., and Mandelkern, L. The morphology of blends of linear and branched polyethylenes in solid state by SANS. United States: N. p., 1995. Web. doi:10.2172/34328.
Wignall, G.D., Londono, J.D., Alamo, R.G., & Mandelkern, L. The morphology of blends of linear and branched polyethylenes in solid state by SANS. United States. doi:10.2172/34328.
Wignall, G.D., Londono, J.D., Alamo, R.G., and Mandelkern, L. Wed . "The morphology of blends of linear and branched polyethylenes in solid state by SANS". United States. doi:10.2172/34328. https://www.osti.gov/servlets/purl/34328.
@article{osti_34328,
title = {The morphology of blends of linear and branched polyethylenes in solid state by SANS},
author = {Wignall, G.D. and Londono, J.D. and Alamo, R.G. and Mandelkern, L.},
abstractNote = {In a previous paper, the authors have shown how small-angle neutron and X-ray scattering (SANS, SAXS) can be used to determine the melt compatibility of different polyolefins, including high-density (HD), low-density (LD), and linear low density (LLD) polyethylene. Such blends have attained widespread commercial applications, though the understanding of the mechanical and melt-flow properties of such blends has hitherto been handicapped by the absence of a consensus concerning the degree of mixing of the components, both in the melt and solid states. Recent SANS data indicate that for HDPE/LDPE blends, the melt is homogeneous for all compositions after proper accounting for H/D isotope effects. In this publication the authors use complementary SANS, DSC, and SAXS to examine the types of morphologies and the different degrees of phase separation which may arise via crystallization effects on cooling from a homogeneous melt.},
doi = {10.2172/34328},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 1995},
month = {Wed Mar 01 00:00:00 EST 1995}
}

Technical Report:

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