材料科学
热塑性聚氨酯
聚二甲基硅氧烷
复合材料
聚氨酯
热塑性塑料
模数
聚合物
混合(物理)
弹性体
量子力学
物理
作者
Bozhen Wu,Hanyu Wang,Yang Chen,Zhen Wang,Tim Maertens,Tairong Kuang,Ping Fan,Feng Chen,Mingqiang Zhong,Jun Tan,Jintao Yang
标识
DOI:10.1016/j.supflu.2021.105324
摘要
It is still challenging to fabricate polymer foams with bimodal structure via a simple technique in the both industrial and academic fields. In this work, by mixing polydimethylsiloxane (PDMS) into thermoplastic polyurethane (TPU) and utilizing the difference of foaming dynamics between TPU and PDMS, the target foams with bimodal structures were successfully prepared through a one-step foaming process. It was shown that under the optimal conditions (i.e. PDMS content of 15 wt%, foaming temperature of 100 °C and foaming pressure of 13.8 MPa), the resultant foam possessed distinct bimodal structures with large cells of ~12 µm and small cells of ~3 µm. Such bimodal structures also help the forms to have the excellent compress strength and modulus of 506 kPa and 1618 kPa, which are much higher than the foam with uniform structure. In addition, bimodal structure foam has ~3 dB higher sound insulation than uniform structure foam.
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