Isotactic Poly(4-methyl-1-pentene)(P4MP)分子在溶液中因受到與溶劑分子之間的交互作用影響，在不同的溫度與不同的溶劑下，最適當的分子鏈構形(chain conformation)會有所不同。這些在不同條件下所採取的分子鏈構形，亦促成了P4MP分子於溶液中呈現多樣化的分子聚集行為，包括凝膠的形成與結晶成長。
本論文於恆溫結晶實驗中發現，當稀薄溶液由溶解溫度直接急冷至持溫溫度後，P4MP分子可於溶液中，快速聚集並形成一類似凝膠的網路結構(gelation network; microgel)。考慮溶液的濃度與形成凝膠網路的速率，此凝膠網路的形成，較無法以傳統的液相-液相分離機制來解釋。
P4MP分子於稀薄溶液中聚集成的網路結構，會隨著時間於等溫的條件下進一步轉變為結晶相。於實驗中觀察到，其相轉變及結晶成長的方式，隨著溫度會有所不同。在較低的溫度，結晶層(lamellae)堆疊的方向垂直堆疊於該節凝膠網路方向。凝膠網路結構，可在凝膠中發現層狀結晶的生成，且隨著持溫時間層狀結晶彼此融合(welding)而增厚。在較高的溫度，結晶層(lamellae)平行堆疊於該節凝膠網路方向。對二甲苯溶液恆溫結晶過程所產生的凝膠中，觀測到層狀結晶間孔洞的出現，而孔洞間具有條狀聯結隨著結晶增厚而產生。
P4MP分子於對二甲苯溶液中形成之凝膠網路，因恆溫溫度不同，其凝膠網路中層狀結晶成長機制亦有所差異。且因為凝膠中層狀結晶生長與堆疊方式，進一步證實溶液中，持溫溫度影響高分子與溶劑分子間的排列，導致凝膠中結晶行為的不同。

Isotactic Poly(4-methyl-1-pentene)(P4MP) can be affected by the interaction of solvent molecule in solution. The appropriate chain conformation of P4MP will be varieties at different temperature and solvent, and the different chain conformations will make P4MP molecules have variety of aggregation behavior in solution, including gelation network composition and crystal growth.
The dissertation discovers P4MP molecules can form gelation network in dilute solution by using isothermal crystallization. Gelation network can be discovered in dilute solution briskly, as the solution quenches from dissolution temperature to isothermal crystallization temperature. When we consider the solution concentration and the rate of becoming gelation network, the mechanism of gelation networks are different from liquid-liquid phase separation, which require super-cooling and stirring.
The gelation network in dilute solution by isothermal crystallization will transform to crystal phase with time. In experiment, the crystal growth of gelation network by low temperature xylene solution can form lamellar structure perpendicular to gelation network direction. The lamellar crystal can be welding with isothermal time increase. The gelation network of isothermal crystallization by p-xylene in low temperature, because p-xylene can increase P4MP molecules crystallization rate, which make welding phenomenon difficult to observe in low temperature p-xylene solution.
The gelation network of P4MP molecules in p-xylene solution, because different isothermal temperature, the growth mechanism of lamellar crystal can also be different. The lamellar crystal growth of gelation network in high temperature p-xylene solution will be parallel to gelation network direction, which is different from lamellar crystal in low temperature solution. This shows that the growth mechanism of P4MP molecules gelation network in solution is different because difference of isothermal temperature. We can further verify that in solution, the interaction between polymer and solvent are affected by isothermal temperature and result in the difference of crystallization behavior in gel because the growth and pile of lamellar crystal in gel.

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