Dynamic Viscoelasticity of High Modulus Fiber Reinforced Composite Resins and Molecular Motion and Dynamic Viscoelasticity of Molecular Composite Resins

为了制备性能优良的义齿基托聚合物，我们研制了以PMMA树脂为夹芯的处理过的碳纤维（CF）和Kevlar纤维（KF）布的宏观复合材料试样，以及以PMMA树脂为基体，以聚芳酰胺为刚性核分子的微观分子复合材料。（称为ECF短，0.1mm厚1片）增强树脂的弯曲强度提高了25%，拉伸强度提高了50%，从ACRON。氯磺化胶乳间苯二酚处理KF布（称为CLRKF短，0.1mm厚1片）增强树脂的弯曲强度提高了25%，采用动态力学热分析仪（DMTA）研究了纤维增强复合材料中纤维布与基体树脂之间的相互作用。测定了这些试样的动态储能模量（E '）值和α峰的tan δ值， ...更多信息 在从玻璃态到粘流态（50-250 ℃）的范围内进行了测定。D. DMTA。在150 ℃下，未处理的CF布（1片）的复合样品的E'值从ACRON增加了50%。C.在150 ℃下，未处理的KF布（1片）的复合样品的E'值比ACRON增加了40%。C.这些结果表明，在布夹芯复合材料试样中，极性基团对表面布与基体之间的分子相互作用有显著影响。经化学处理的碳纤维布复合试样的E'值低于未经化学处理的碳纤维布复合试样的E'值。化学处理过的碳纤维布的纤维表面。可能是化学反应造成的。ECFA的E'值比200 ℃时的ACRON增加了120%。ECF布复合材料试样的弯曲强度、拉伸强度、冲击强度和E'值随ECF毛片数（0.1mm厚）的增加而增加，α峰温度随ECF毛片数的增加而降低。这可能是由于低分子量和未聚合的环氧处理剂的用量随ECF数量的增加而增加。对聚间苯二甲酰胺（MPIA）和聚对苯二甲酰胺（PPOT）分子本身也进行了研究。研究了N-辛基-PPTA（Oct-PPTA）、N-辛基-MPIA（Oct-MPIA）和N-辛基-PPOT（Oct-PPOT）分别与PMMA复合的分子复合树脂（简称Oct-PPTA-PMMA、Oct-MPIA-PMMA和Oct-PPOT-PMMA）的力学性能。通过核磁共振（NMR）、热重分析（TG）和动态热分析（DMTA）对复合材料的结构进行了表征，用T_1（反转恢复法）NMR谱研究了N-辛基化聚芳酰胺的羰基和甲基的分子运动，结果表明，N-辛基化聚芳酰胺的分子运动顺序为Oct-PPTA <Oct-PPOT<Oct-MPIA。主链具有上级直链性的核心分子的羰基和甲基的T_1值较小。复合材料的初始失重温度为Oct-PPTA-PMMA（266 ℃）。C）>Oct-PPOT-PMMA（263 μ g. C）>Oct-PPTA-MPIA（246 μ g. C）>PMMA（237 μ g.在200 ℃下，Oct-PPTA-PMMA和Oct-PPOT-PMMA的E'值比PMMA提高了35%，Oct-MPIA-PMMA的E'值比PMMA提高了15%。Oct-PPTA-PMMA、Oct-MPIA-PMMA、Oct-PPOT-PMMA和PMMA的T_1值、失重起始温度、E'值与牙科材料性能有良好的相关性，表明由直链聚芳酰胺分子组成的PMMA树脂具有较好的牙科材料性能。少

Macro level composite specimens of treated carbon fiber (CF) and Kevlar fiber (KF) cloths sandwiched by PMMA resin, and micro level molecular composites composed of PMMA resin as matrix reinforced with polyaramides as rigid core molecules have been developed to produce denture base polymers with improved dental material properties.The epoxy treated CF cloth (called ECF short, 0.1mm thickness 1 sheet) reinforced resin was improved in bending strength by 25% and tensile strength by 50% from ACRON. The chlorosulfonated latex resorcine treated KF cloth (calledCLRKF short, 0.1mm thickness 1 sheet) reinforced resin was improved in bending strength by 25%, in tensile strength by 80% and izod impact strength by 70% from ACRON.The interaction between surface treated fiber cloths and the matrix resin in the fiber reinforced composites was investigated using a Dynamic Mechanical Thermal Analyzer (DMTA).The dynamic storage modulus (E') value and tan delta of alpha peak of these specimens were meas … More ured in the region from glass state to viscous flow state (50-250 ^。C) by DMTA. E' value of the composite specimen of the non-treated CF Cloth (1 sheet) was increased by 50% from ACRON at 150 ^。C. E' value of the composite specimen of the non-treated KF cloth (1 sheet) was increased by 40% from ACRON at 150 ^。C. These findings indicate a significant effect of the polar groups on the molecular interaction between the surface cloths and matrix in the cloth sandwiched composite specimens. The E' value of composite specimen of chemically treated CF cloth was lower than the E' value of composite specimen of non-treated CF Cloth. The fiber surface of the chemically treated CF cloth. Was assumed to be damaged by the chemical reaction. ECFA was increased in E' value by 120% from ACRON at 200^。C and showed the lowest (1.31) value in tan delta in the composite specimens.The bending, tensile and izod impact strength and E' value of the composite specimens of the ECF cloth increased with the number of ECF pile sheets (0.1mm thickness), while the temperature of the alpha peak of composite specimens decreased with the number of the ECF pile sheets. This may be due to the increase of the amount of low molecular weight and non-polymerized epoxy treated agent with the number of ECF.Rigid core composites made of derivatives of poly-p-phenylene terephthalamide (PPTA). Poly-m-phenylene isophthalamide (MPIA) and poly-p-phenylene-3.4'-oxydiphenylene terephthalamide (PPOT) molecules themselves were also examined.N-octylated polyaramides were soluble in methylmethacrylate nonomer. Themechanical properties of the nolecular composite resins (called Oct-PPTA-PMMA, Oct-MPIA-PMMA and Oct-PPOT-PMMA short) compounding 3wt% of N-octylated-PPTA (Oct-PPTA), N-octylated-MPIA (Oct-MPIA) and N-octylated-PPOT (Oct-PPOT) to PMMA. Were in the order of Oct-PPTA-PMMA>Oct-PPOT-PMMA >Oct-MPIA-PMMA *PMMA.The characters of the molecular composites were examined, using nuclearmagnetic resonance (NMR) spectroscopy, thermogravimetric (TG) analysis and DMTA.The molecular motion of carbonyl and methyl group of N-octylated polyaramides were in the order of Oct-PPTA <Oct-PPOT<Oct-MPIA by T_1 (inversion recovery method) NMR spectra in CDCI_3. T_1 values of carbonyl and methyl group of the core molecules which have superior straight property of main chain are rather small. Initial temperature of weight loss of the composite were in the order of Oct-PPTA-PMMA (266 ^。C) >Oct-PPOT-PMMA (263 ^。C) >Oct-PPTA-MPIA (246 ^。C) >PMMA (237 ^。C) by TG analysis.E' values of Oct-PPTA-PMMA and Oct-PPOT-PMMA were improved by 35% and E'value of Oct-MPIA-PMMA was improved by 15% from PMMA at 200 ^。C.There was a good correlation among the T_1 values, stating temperature of weight loss, E' values and dental material properties of Oct-PPTA-PMMA, Oct-MPIA-PMMA, Oct-PPOT-PMMA and PMMA.In conclusion, PMMA resins composed of the polyaramide molecule of straight main chain have suit able dental material properties. Less