China) according to GB/T1447-2005
(China) and GB/T1449-2005 (China) respectively. A crosshead
speed of 2 mm/min was used. The test of Izod impact was performed
by Notched Izod impact instrument (XCJ-50 test machine,
Chengde test Instruments Ltd., China) accordance to GB 1843
(China). At least five specimens were used for each test, and average
values were reporte