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首页> 外文期刊>Crystal growth & design >The Stability and Nature of the Form IV Polymorph of Cocoa Butter Is Dictated by 1-Palmitoyl-2-Oleoyl-3-Stearoyl-Glycerol
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The Stability and Nature of the Form IV Polymorph of Cocoa Butter Is Dictated by 1-Palmitoyl-2-Oleoyl-3-Stearoyl-Glycerol

机译：通过1-palmItoyl-2-OXeoyl-3-硬脂酰基 - 甘油决定了可可脂的IV多晶型物的稳定性和性质

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In this Communication we report that both the crystal structure of form IV of cocoa butter (CB) as well as the rate of polymorphic transformation of CB from form IV to form V are controlled by binary interactions between 1-palmitoyl-2-oleoyl-3-stearoyl-glycerol (POS) and 1,3-stearoyl-2-oleoyl-glycerol (SOS), and POS with 1,3-dipalmitoyl-2-oleoyl-glycerol (POP). The official tempering procedure of the American Oil Chemists Society (AOCS) did not yield beta (triclinic) forms in POP and POS, which remained in the pseudo-beta' form. On the other hand, SOS did fully transform to the beta form after tempering. Moreover, as similar to 1:1 (w/w) binary mixtures, neither POP:POS nor POS:SOS transformed from their pseudo beta prime form to the expected beta (triclinic) form after the official tempering procedure either. SOS:POP binaries, on the other hand, did undergo the transformation. A melting point for melt crystallized binary mixtures containing POP, POP:POS (46.8:48.7), and POP:SOS (46.8:44.8) at 31.S and 31.6 degrees C, respectively, was observed, while 36.7 degrees C was observed for POS:SOS (46.8:44.8). For the equivalent solvent-crystallized binary mixtures, POP:POS had a melting point of 29.4 degrees C, POP:SOS melted at 36.1 degrees C, while 36.2 degrees C was observed for POS:SOS. Based on these results, we conclude that the polymorphic transition of cocoa butter form IV to form V is controlled by POS interactions.
机译：在该通信中，我们报告称Cocoa黄油（Cb）形式IV的晶体结构以及来自形式IV的Cb的多态性转化速率由1-palmItoyl-2-Oleyl-3之间的二元相互作用控制-searoyl-甘油（POS）和1,3-硬酰-2-油牛 - 甘油（SOS）和具有1,3-二普利-2-Oleyoyl-甘油（POP）的POS。美国石油化学家协会（AOC）的官方回火程序没有在流行音乐和POS中产生Beta（三星）形式，这仍然处于伪β的形式。另一方面，在回火后，SOS确实完全转化为β形成。此外，与1：1（w / w）二元混合物一样，POL：POS和POS：SOS在官方回火过程之后从其伪β素形式转换为预期的β（三星）形式。 SOS：流行二进制文件，另一方面，经历了转型。含有POP，POL（46.8：48.7）的熔融结晶二元混合物的熔点，POL（46.8：48.7），POP：SOS（46.8：44.8）分别在31.S和31.6摄氏度下，观察到36.7摄氏度POS：SOS（46.8：44.8）。对于等效的溶剂结晶二元混合物，POP：POS具有29.4℃的熔点，POP：SOS在36.1℃下熔化，而POS观察到36.2℃：SOS：SOS。基于这些结果，我们得出结论，通过POS相互作用来控制可可脂晶型IV的多态转变。

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