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首页> 外文期刊>Journal of Applied Polymer Science >SYNTHESIS AND PROPERTIES OF THERMOSTABLE NAPHTHALATE-CONTAINING COPOLY(AMIDE-IMIDE)S
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SYNTHESIS AND PROPERTIES OF THERMOSTABLE NAPHTHALATE-CONTAINING COPOLY(AMIDE-IMIDE)S

机译：含热邻苯二甲酸盐的酰胺（酰亚胺）的合成与性能

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Thermostable naphthalate-containing copoly(amide-imide)s with inherent viscosity of 0.53-0.96 dL/g were synthesized by reacting diacid-terminated naphthalate monomers with various diisocyanate-terminated polyimide prepolymers. The polyimide prepolymers were prepared by using 4,4'-diphenylmethane diisocyanate to react with 3,3',4,4'-benzophenonetetracarboxylic dianhydride, pyromellitic dianhydride, or 3,3',4,4'-sulfonyl diphthalic anhydride using a direct one-pot method to improve their solubility without sacrificing their thermal properties. The copolymers, except the B-2 and P-2 series, can be dissolved in N,N-dimethylacetamide and 5% lithium chloride or dimethyl sulfoxide at high temperature but are not soluble in pyridine. The solubility of the copolymers is related to their chemical and crystalline structures. Those copolymers with sulfonyl or amorphous structures display good solubility. All the naphthalate-containing copoly(amide-imide)s have glass transition temperatures and melting points in the range of 223-312 degrees C and 348-366 degrees C, respectively, and show a 10% weight-loss temperature of 485-549 degrees C in air and 465-564 degrees C in a nitrogen atmosphere. The tensile strength, elongation at break, and initial modulus of polymer films range from 25-74 MPa, 4-9%, and 0.74-1.60 GPa, respectively. From the X-ray diffraction studies, copolymers of B-2, P-2, and D-2 with symmetrical 2,6-naphthalate amide structure are crystalline, but the others are amorphous. (C) 1997 John Wiley & Sons, Inc. [References: 15]
机译：通过使二酸封端的萘酸酯单体与各种二异氰酸酯封端的聚酰亚胺预聚物反应，合成了固有粘度为0.53-0.96 dL / g的含热稳定的萘二甲酸酯共聚（酰胺-酰亚胺）。通过使用4,4'-二苯基甲烷二异氰酸酯与3,3'，4,4'-二苯甲酮四羧酸二酐，均苯四甲酸二酐或3,3'，4,4'-磺酰基二邻苯二甲酸酐反应制备聚酰亚胺预聚物一锅法，以提高其溶解度而不牺牲其热性能。除B-2和P-2系列外，该共聚物在高温下可溶于N，N-二甲基乙酰胺和5％氯化锂或二甲基亚砜，但不溶于吡啶。共聚物的溶解度与其化学和晶体结构有关。那些具有磺酰基或无定形结构的共聚物显示出良好的溶解性。所有含萘二甲酸酯的共聚（酰胺-酰亚胺）的玻璃化转变温度和熔点分别在223-312℃和348-366℃范围内，并且10％的失重温度为485-549空气中的摄氏1度和氮气中的摄氏465-564度。聚合物膜的拉伸强度，断裂伸长率和初始模量分别为25-74 MPa，4-9％和0.74-1.60 GPa。根据X射线衍射研究，具有对称的2,6-萘二甲酰胺结构的B-2，P-2和D-2共聚物为结晶，而其他为非晶。 （C）1997 John Wiley＆Sons，Inc. [参考：15]

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