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| the prepared films had high tensile strength and modulus, good toughness , heat resistance, and thermal stability and also low water absorption. The study also found that the degree of freedom in ab sequence including BOA of benzene chain and ones which had ODA segment and the segment with the formation of between is greater than the corresponding homopolymer chain aa sequence containing BOA and bb sequenc containing ODA , leading to Tg measured by the FOX equation smaller than the theoretical value calculated . |

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12345ruby629(½ð±Ò+10, ·ÒëEPI+1): 2011-05-07 13:04:13
| To further control the structure and properties of polyimide in the main chain that contained the structure of benzene and oxazole |

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