HPVC/PP共混改性研究Ⅳ共混物的流变特性

STUDY ON THE MODIFICATION OF HPVC/PP BLENDⅣ. RHEOLOGICAL PROPERTIES OF THE BLENDS

研究了ＨＰＶＣ／ＰＰ共混物的流变性能，结果表明，ＣＰＥ、ＡＢＳ对ＨＰＶＣ／ＰＰ有增粘作用。随着ＣＰＥ用量增加，共混物熔体粘度（ηａ）增加。ＣＰＥ或ＡＢＳ先与ＨＰＶＣ共混后再与ＰＰ共混的共混物的ηａ高于ＣＰＥ或ＡＢＳ先与ＰＰ共混后再与ＨＰＶＣ共混的共混物的ηａ。ＨＰＶＣ／ＰＰ、ＨＰＶＣ／ＰＰ／ＭＡＨ２．５、ＨＰＶＣ／ＰＰ／ＣＰＥ１０、ＨＰＶＣ／ＰＰ／ＡＢＳ１０共混物的ηａ～组成（Ｃ）的关系均属于正－负偏离共混物（Ｐ－ＮＤＢ）体系，即在特定共混比下发生相转变。

The rheological properties of HPVC/PP blends were studied. The results show that the CPE, ABS can increases the viscosity of HPVC or PP. The melt viscosity (ηa) of the blends increases with increasing the amount of CPE. The ηa of the blend that CPE or ABS was blended with HPVC firstly, then they were blended with PP was higher than the ηa of the blned that CPE or ABS was blended with PP firstly, then they were blended with HPVC. The ηacomposition(C) relationships of HPVC/PP, HPVC/PP/MAH2.5, HPVC/PP/CPE10 and HPVC/PP/ABS10 blends are all belong to positivenegative deviation blends(pNDB) system. They all had phase inversions at certain blending ratios.