It is noted that the dissipative mixing melting is the dominant mechanism of HDPE pellets in kneading blocks and sea island melting model is the typical one.

• 研究表明，耗散-混合熔融是捏合块中聚合物熔融的主要机理，海-岛式熔融模型是捏合块中聚合物熔融的典型形态；