Study on the Foaming Behaviors of PBS and Its Modification with PA6IcoT Assisted by scCO2,Advanced Engineering Materials

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Study on the Foaming Behaviors of PBS and Its Modification with PA6IcoT Assisted by scCO2
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2021-09-16 , DOI: 10.1002/adem.202100713
Shao-shuai Liu ₁ , Qiang Wang ₂ , Shi-qi Zhang ₁ , Zhen Yao ₁ , Long-Cheng Tang ₃ , Kun Cao _{1,

4}

Affiliation

The foaming behaviors of a semicrystalline poly(butylenes succinate) (PBS) and its blends with an amorphous semiaromatic nylon poly(hexamethylene (iso-co-tere)phthalamide) (PA6IcoT) assisted by supercritical CO₂ (scCO₂) as blowing agent at 110–130 °C and 16–24 MPa are investigated. The results show that the average cell diameter and cell density of the pure PBS foam obtained at 24 MPa and 120 °C are 46 μm and 1.6 × 10⁷ cells cm⁻³, respectively. The cell coalescence is prevented and heterogeneous nucleation is induced in the presence of PA6IcoT in the physical blends (mPBS), resulting smaller cell size as 12 μm and higher cell density as 1.6 × 10⁹ cells cm⁻³ in the foams at 24 MPa and 120 °C. The reactive blends (rPBS) with PA6IcoT prepared by 2,2-(1,3-benzene)bis(2-oxazoline) (PBO) as chain extender are promising for higher complex viscosity and lower crystallinity, resulting in higher melt strength and better foamability. The rPBS foams with cell size as small as 8 μm and cell density as high as 2.0 × 10⁹ cells cm⁻³ are obtained at 24 MPa and 120 °C.

中文翻译：

scCO2辅助下PBS的发泡行为及其PA6IcoT改性研究

_{在超临界 CO 2} ( scCO ₂ ) 作为发泡剂的辅助下，半结晶聚丁二酸丁二醇酯 (PBS) 及其与无定形半芳族尼龙聚六亚甲基 (异对苯二甲酸) 邻苯二甲酰胺 (PA6IcoT) 的共混物的发泡行为研究了 110–130 °C 和 16–24 MPa。结果表明，在24 MPa和120 ℃下获得的纯PBS泡沫的平均泡孔直径和泡孔密度分别为46 μm和1.6×10 ⁷个泡孔cm ^-3。在物理共混物 ( m PBS)中存在 PA6IcoT 的情况下，防止细胞聚结并诱导异质成核，导致细胞尺寸更小为 12 μm，细胞密度更高，为 1.6 × 10 ^{9 个}细胞 cm^-3在 24 MPa 和 120 °C 的泡沫中。以 2,2-(1,3-苯)双(2-恶唑啉) (PBO) 为扩链剂制备的 PA6IcoT反应性共混物 ( r PBS) 有望获得更高的复数粘度和更低的结晶度, 从而获得更高的熔体强度和起泡性更好。在24 MPa和120°C下获得了泡孔尺寸小至8 μm、泡孔密度高达2.0 × 10 ^{9 个}细胞cm ^-3的r PBS泡沫。

更新日期：2021-09-16

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