Relationship between filler and matrix resin characteristics and the properties of uncured composite pastes.
Relationship between filler and matrix resin characteristics and the properties of uncured composite pastes.
复制标题
填料和基体树脂特性与未固化复合浆料性能之间的关系。
DOI：
10.1016/s0142-9612(98)80001-x
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发表时间：
1998
期刊：
影响因子：
14
通讯作者：
McGrath,JE
中科院分区：
文献类型：
--
作者：
Taylor,DF;Kalachandra,S;Sankarapandian,M;McGrath,JE
研究了填料种类、填料含量、基体树脂组成与复合浆料粘度和流动特性之间的关系。根据需要用TEGDMA稀释BIS-GMA和10种实验BIS-GMA类似物以产生对应于商业复合基质的粘度范围的1000和2000 cp溶液。将所有这些树脂与硅烷化混合填料和硅烷化微填料混合。对于每种组合，确定最大填料含量，以及在一系列填料含量下的糊剂塑性（可塑性）。通过修改ADA规范方法来测量膏体硬度，该方法用于确定磷酸锌和硅酸盐水泥的标准测试硬度。对于每个单体-填料组合，增加填料含量导致塑性单调降低。最大填料含量似乎是特定填料的属性，而不是基质树脂特性。对于所使用的材料，混合填料的最大含量为约86wt%（83vol%）填料，微填充材料的最大含量为约36wt%（24vol%）填料。在较低的填料含量，塑性差异出乎意料地存在，即使在相同的填料含量和基质粘度。有证据表明，可塑性与基础单体组合物和TEGDMA的量存在变化。结果表明，当控制所有已知的机械因素时，填料和基质之间的成分相互作用会影响结果。
The relationships between filler type, filler content, matrix resin composition and viscosity and the flow characteristics of composite paste formulations have been investigated. BIS-GMA and 10 experimental BIS-GMA analogues were diluted as needed with TEGDMA to produce 1000 and 2000cp solutions corresponding to the viscosity range of commercial composite matrices. All of these resins were mixed with a silanated hybrid-filler and a silanated micro-filler. For each combination the maximum filler content was determined, as well as the paste consistencies (plasticities) at a series of filler contents. Paste consistencies were measured by a modification of the ADA specification methods developed for determining standard test consistencies for zinc phosphate and silicate cements. For each monomer–filler combination increasing filler contents resulted in monotonically reduced plasticities. The maximum filler contents appeared to be an attribute of the particular filler rather than matrix resin characteristics. For the materials used, the maximum contents were approximately 86wt% (83vol%) filler for the hybrid filler, and 36%wt% (24vol%) for the microfilled material. At lower filler contents, plasticity differences unexpectedly existed even at equal filler contents and matrix viscosities. Evidence was found that the plasticity varied both with the base monomer composition and the amount of TEGDMA present. The results imply that compositional interactions between the filler and matrix influence the results when all known mechanical factors are controlled.