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On the first point ,if a system increases fold separation by adopting inclined lamellae as in polyethylene surface stress due to fold congestion is evidently more of a factor than when lamellae are always perpendicular as in isotactic polypropylene. It is too hard to understand this sentence for me. Who can help me? |
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2Â¥2010-10-04 16:37:02
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3Â¥2010-10-04 17:02:03
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