Impact Strength of PP / Elastomer / Fine CaCO3 Ternary Composite

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  • PP/エラストマー/微粒子炭酸カルシウム複合材料の衝撃強度におよぼすエラストマー変性の効果
  • PP エラストマー ビリュウシ タンサン カルシウム フクゴウ ザイリョウ ノ ショウゲキ キョウド ニ オヨボス エラストマー ヘンセイ ノ コウカ

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Polypropylene(PP)/elastomer/fine filler particles ternary composites were prepared using polystylene-block - poly (ethylene-butene)-block-polystylenetriblock copolymer (SEBS) or carboxylated SEBS(C-SEBS) as elastomer and calcium carbonate (CaCO3) having mean size about 160nm asfiller.Firstly, SEBS (or C-SEBS) and CaCO3 particles were mixed to form master batch.Secondly, the prepared master batch and matrix PP were kneaded.In the PP/SEBS/CaCO3 ternary composites,CaCO3 particles and SEBS particles were dispersed in the PP matrix in dependently.In the PP/C-SEBS/CaCO3 ternary composites, CaCO3 particles were encapsulated in C-SEBS and formed a core-shell structure at the lower CaCO3concentration.However, some CaCO3 particles were dispersed inPP matrix independentlyat the higher CaCO3 concentration, and the CaCO3 particles in PP matrixincreased with the CaCO3 concentration.In the PP/SEBS/CaCO3 composites, the impact strengthincreased with the amount of incorporated CaCO3 particles.In the PP/C-SEBS/CaCO3 composites,whereas the impact strength increased dependent upon the amount of CaCO3 particles dispersed in PP matrix.The master batch method was found to be useful for improving the dispersibility of CaCO3particles than the commonly used one batch method.

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