In an embodiment, the composite material includes a PLLA fiber material and {HEAD ~ a matrix material} that does not have {TAIL ~ the same chemical element composition} as the fiber material 
In an embodiment , the composite material includes a PLLA fiber material and { HEAD ~ a matrix material } that does not have { TAIL ~ the same chemical element composition } as the fiber material
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH