| 聚降冰片烯/苯乙烯-丁二烯-苯乙烯嵌段共聚物共混物的形状记忆性能研究 |
| Study on Shape Memory Properties of PNB/SBS Blends |
| 投稿时间：2023-12-29 修订日期：2023-12-29 |
| DOI：10.12136/j.issn.1000-890X.2025.09.0643 |
| 中文关键词: 聚降冰片烯 苯乙烯-丁二烯-苯乙烯嵌段共聚物 形状记忆性能 储能模量 璃化转变温度 形变恢复率 |
| 英文关键词: PNB SBS shape memory property storage modulus glass transition temperature shape recovery ratio |
| 基金项目: |
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| 摘要点击次数: 37 |
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| 中文摘要: |
| 研究不同用量比聚降冰片烯（PNB）/苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）共混物的微观结构、拉伸性能、动态力学性能和形状记忆性能。结果表明：当SBS以分散相分布于PNB中时，二者相容性较好，SBS对PNB起到很好的增韧效果；随着SBS用量的增大，PNB/SBS共混物在低温下的储能模量（E′）提高，当温度升高到玻璃化转变区域时，共混物的E′降低，共混物中PNB的tanδ峰值减小且向高温方向移动；同时随着SBS用量的增大，PNB/SBS共混物的玻璃化转变温度向高温方向移动，共混物的拉伸强度降低，拉断伸长率提高；SBS的加入使PNB中的物理缠结减少，随着SBS用量的增大，PNB/SBS共混物的形变恢复率和形状固定率降低。 |
| 英文摘要: |
| The microstructures，tensile properties，dynamic mechanical properties and shape memory properties of poly（norbornene）（PNB）/styrene-butadiene-styrene block copolymer（SBS）blends with different dosage ratios were investigated.The results showed that when SBS was dispersed in PNB as the dispersed phase，the compatibility between the two was relatively good，and SBS had an excellent toughening effect on PNB.As the amount of SBS increased，the storage modulus（E′） of the PNB/SBS blend at low temperatures increased.When the temperature rose to the glass transition region，the E′ of the blend decreased.The tanδ peak value of PNB in the blend decreased and shifted towards higher temperature.At the same time，as the dosage of SBS increased，the glass transition temperature of the PNB/SBS blend shifted towards higher temperature，the tensile strength of the blend decreased，and the elongation at break increased.The addition of SBS reduced the physical entanglement in PNB.As the dosage of SBS increased，the shape recovery ratio and shape fixation ratio of the PNB/SBS blend decreased. |
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