1[1]Crawford R J, et al. The formation and removeal of gas bubbles in a rotational moulding grade of PE. Plastics and Rubber Processing and Applications, 1987,7(2) :85
2[2]Spence A G, et al. The effect of processing variables on the formation and removal of bubbles in rotationally molded products. Polym Eng Sci, 1996,36(7):993
3[3]Chen C H, et al. Mold pressurization as a method to reduce warpage in rotational molding of polyethylene. Polym Eng Sci, 1990,30(23):1523
4[4]Liu S J, et al. Optimizing the impact strength of rotationally molded parts. Polym Eng Sci,2000,40(2) :473
