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首页> 外文会议>International Conference on Polymer Processing >Polypropylene composite toughened by a novel modified nano-CaCO3
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Polypropylene composite toughened by a novel modified nano-CaCO3

机译：聚丙烯复合材料由新型改性纳米CaCO3增韧

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摘要

A novel modified nano-calcium carbonate (R-CCR) was prepared by coating a layer of organic compound with three functional groups(-OH, -COOH and C=C ) on the surface ofCCR (a commercial nano-CaCO3 modified with stearic acid) powders in solid state. FTIR indicated that the modifier is combined on the surface of CaCO3. TEM showed the particle sizes of R-CCR and CCR locate in the range of 40～90nm. The mechanical properties results showed that R-CCR and EPDM has obvious synergistic toughening effect on PP. The determination of density and swelling ratio suggested that the cavitation of PP/EPDM/R-CCR composite is bigger than that of PP/EPDM/CCR. SEM photographs of the impact fractured surfaces showed that there are many little cavities in PP/EPDM/R-CCR system, and R-CCR particles disperse in matrix more uniformly and fine and the agglomeration is weaken. SEM photographs of the tensile fractured surface of PP/EPDM/R-CCR showed a fibroid morphology and large-scale yield deformation. The addition of R-CCR induces the formation of β phase PP and the content of β phase PP increases obviously after addition of EPDM. The synergistic toughening effect of R-CCR and EPDM on PP comes from the dual effect of cavitation and β phase PP.
机译：通过CCR表面涂覆有三个官能团（-OH，-COOH和C = C）的有机化合物制备一种新型改性的纳米碳酸钙（R-CCR）（用硬脂酸改性的商业纳米CACO3改性）固态的粉末。 FTIR表示修饰符组合在Caco3的表面上。 TEM显示R-CCR和CCR的粒度定位在40〜90nm的范围内。机械性能结果表明，R-CCR和EPDM对PP具有明显的协同增韧效果。密度和溶胀比的测定表明，PP / EPDM / R-CCR复合材料的空化大于PP / EPDM / CCR的空化。冲击裂缝表面的SEM照片显示PP / EPDM / R-CCR系统中存在很多小腔，并且R-CCR颗粒更均匀地分散在基质中，并且脱离浓度。 PP / EPDM / R-CCR的拉伸裂缝表面的SEM照片显示了纤维体形态和大规模产量变形。加入R-CCR诱导β相PP的形成，并且在加入EPDM后，β相PP的含量明显增加。 R-CCR和EPDM对PP的协同增韧效果来自空化和β相PP的双重效果。

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