采用双螺杆挤出机制备了聚丙烯(PP)/回收聚酯(PET),回收PET/相容剂和不同相容剂增容PP/回收PET共混物,研究了以上共混物的剪切黏度、剪切应力与剪切速率的关系.结果表明,PP剪切黏度随回收PET含量增加而降低,剪切速率越高,剪切黏度降低越明显,具有典型的剪切变稀特性.加入PP-g-MA能提高PP/回收PET共混物剪切黏度,但加入PP-g-GMA会降低PP/回收PET共混物剪切黏度.PP/回收PET共混物剪切应力随r-PET含量增加而降低.PP-g-MA使回收PET/PP共混物剪切应力增大,但PP-g-GMA使共混物剪切应力降低.
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