Comparison Study on the Heterogeneous Nucleation of Isotactic Polypropylene by Its Own Fiber and α Nucleating Agents
Comparison Study on the Heterogeneous Nucleation of Isotactic Polypropylene by Its Own Fiber and α Nucleating Agents
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DOI：
10.1021/ie303200z
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发表时间：
2013-03
影响因子：
4.2
通讯作者：
Yannan Quan;Huihui Li;Shouke Yan
中科院分区：
文献类型：
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作者：
Yannan Quan;Huihui Li;Shouke Yan
研究了等规聚丙烯（iPP）在其自身纤维或/和α成核剂存在下的结晶行为，DBS和NA 11进行了研究。结果表明，两种成核剂均对iPP具有成核作用，促进了iPP的熔融结晶。这表现为与其本体结晶相比，结晶温度向上移动高达10 °C。iPP纤维还表现出对iPP基体的高成核能力，如通过形成穿晶层所证明的。iPP在成核iPP基体/纤维体系中的结晶行为表明，成核剂不影响iPP在纤维周围的转晶。这表明纤维对iPP具有比成核剂更高的成核能力。基于iPP纤维和基质完全相同的化学和晶体结构，结果证明了结构相似性和晶体结构之间匹配的重要性..
The crystallization of isotactic polypropylene (iPP) in the presence of its own fiber or/and α nucleating agents, i.e., DBS and NA11, was studied. The results show that both nucleating agents exhibit nucleation ability toward iPP and accelerate iPP melt crystallization. This is manifested by an upward shift of crystallization temperature by up to 10 °C compared with its bulk crystallization. The iPP fiber exhibits also high nucleation ability toward the iPP matrix as demonstrated by the formation of transcrystalline layers. The crystallization of iPP in the nucleated iPP matrix/fiber system shows that the nucleating agents do not affect the transcrystallization of iPP surrounding its fiber. This indicates that the fiber exhibits higher nucleation ability toward iPP than the nucleating agents. On the basis of the exact same chemical and crystallographic structures of the iPP fiber and matrix, the results demonstrate the importance of structure similarity and matching between the crystallographic structures...