不飽和ポリエステル樹脂-充てん剤複合系の耐煮沸性に各種充てん剤の配合効果

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The effects of various fillers incorporated in the unsaturated polyester resin (UP)-filler system on resistance against degradation in boiling water have been studied. The results are summarized as f ?? follows. The incorporation of fillers in UP improved the retention of flexural strength of the system in boiling water, while it deteriorated that of flexural modulus in a short period of soaking in boiling water but improved that in a long period. The initial flexural strength was decreased markedly but the initial flexural modulus was considerably increased by the incorporation of fillers. The behaviors of the flexural strength and modulus of the system during soaking in boiling water could be explained by the combination of these two effects, that is, the latter effects are predominant in a shorter period of soaking but the former effects take over in the course of soaking. The incorporation of fillers in UP reduced the water absorption of the system. The increase in water absorption lowered both the retentions of flexural strength and modulus. The extent of the decrease in the retentions became smaller for the flexural strength but larger for the flexural modulus, compared with those of UP without fillers. The effects mentioned above varied depending upon the kinds of fillers used, but their tendency was similar. The above results of the degradation of the UP-filler system in boiling water can be explained by the same mechanism proposed in the previous paper by the present authors for the degradation of the UP-CaCO_3 System.
社団法人日本材料学会の論文
1977-07-15

不飽和ポリエステル樹脂-充てん剤複合系の耐煮沸性に各種充てん剤の配合効果

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