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合成納米TiO2／不飽和聚酯樹脂（TiO2／UPR）的研究
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O614.411

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Study of Synthesizing the Nanometer TiO2/ Unsaturated Polyester Resin(Nano-TiO2/UPR)
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    摘要:

    將納米TiO2粉加入到不飽和聚酯中進行同時增韌增強改性時，發(fā)現(xiàn)用簡支梁沖擊強度表征納米TiO2／UPR的韌性時，樹脂有明顯的脆韌轉(zhuǎn)變現(xiàn)象，脆-韌轉(zhuǎn)變點為TiO2含量是6％。納米TiO2／UPR彎曲強度和沖擊強度較UPR分別提高了55％和46％。利用掃描電子顯微鏡觀測納米TiO2/UPR的沖擊斷口形貌時，發(fā)現(xiàn)在脆-韌轉(zhuǎn)變點左右的納米TiO2／UPR的微觀形態(tài)發(fā)生了從脆性斷裂到韌性斷裂的形貌特征。

    Abstract:

    Th e Nanometer TiO 2 powder was put into the unsaturated p olyester resin for the simultaneous mo dification of strength-ening and flexibilizing.The impact strength was used to characterize th e ductility of the nano-TiO 2/UPR.It was found that the resin had the apparent brittleness-ductility t ransition phenomenon,a nd the content of TiO 2 at the brittleness-ductility transition point,was 6wt%.The bending stre ngth and impact strength of the nano-TiO 2/UPR were increased by 55%and 46%respectively compared with those of UPR.The micro observation of the impact fracture i ndicaties that,the fracture pattern of the nano-TiO 2/UPR changes from typical brittleness to typical toughness fracture near th e critical point.

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徐穎 李明利 盧鳳紀(jì) 李賀軍.合成納米TiO2／不飽和聚酯樹脂（TiO2／UPR）的研究[J].稀有金屬材料與工程,2003,(9):719~722.[Xu Ying, Li Mingli, Lu Fengji, Li Hejun . Study of Synthesizing the Nanometer TiO2/ Unsaturated Polyester Resin(Nano-TiO2/UPR)[J]. Rare Metal Materials and Engineering,2003,(9):719~722.]
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