Besides, thermal conductivity exhibits an increasing trend with the average chain length, which is consistent with the previous theoretical study on amorphous polymer at short length scale. 41 For longer samples ( L 0 ≥ 20 nm) where boundary chain folding takes place, κ eff and κ 0 overlap with each other within the statistical error, and both of them show no obvious length dependence.
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Effect of boundary chain folding on thermal conductivity of lamellar amorphous polyethylene.
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