Effect of diisocyanates as compatibilizer on the properties of ramie/poly(lactic acid) (PLA) composites
writer：Tao Yu, Changqing Hu, Xunjian Chen, Yan Li
keywords：A. Polymer–matrix composites (PMCs); B. Interface; B. Mechanical properties; B. Thermal properties
source：期刊
specific source：Composites Part A
Issue time：2015年
Ramie/PLA composites with the diisocyanates as compatibilizer were
fabricated by extrusion and injection molding. The influence of
different diisocyanates and various diisocyanate content on the
mechanical properties and thermal properties of the composites was
investigated. The presence of the diisocyanates in the composites lead
to the improvements in mechanical properties and thermal properties of
the composites. The morphologies of fracture surface using scanning
electron microscopy (SEM) provided evidence of improved interfacial
adhesion between ramie and PLA from the addition of the diisocyanates.
The composites containing isophorone diisocyanate (IPDI) showed the best
mechanical properties. The comparison of various IPDI content showed
that the composites with 1.5% IPDI could get the optimum mechanical
properties, and the excess diisocyanate content resulted in the decrease
in the mechanical properties of the composites. However, IPDI content
had almost no effect on the crystallization and melting behavior of the
ramie/PLA composites.