高校问答鞍山政协:求英语高手帮忙翻译，化工方面材料
来源：百度文库 编辑：高校问答 时间：2024/05/05 11:30:20
The synthesis of the phosphorus-containing epoxy resin (DOPO epoxy resin) was performed by reacting ODOPB with EPI (Scheme 1 ). The product was characterized by IR. The IR spectrum of DOPO epoxy resin is shown in Figure 1. The peak at 917 cm21 absorption indicates the oxirane ring and the peak at 1180–1120 cm21 indicates the P—O—Ph linkage. Other absorption peaks of DOPO epoxy resin are 1248 cm21 (—PAO) and 1400–1500 cm21 (—P—Ph ). The EEW of DOPO epoxy resin was determined by the HClO4/potentiometric titration method and found to be 229 (theoretical is 218).
Curing Reactivity
The curing behaviors of the mixtures of DOPO epoxy and various curing agents were studied by DSC. The relative reactivities of various curing agents toward DOPO epoxy resin area shown in (Fig. 2). For the epoxy resin used, the exothermic starting temperatures increased in the order of DICY , DDS , Ph Nov. A curing agent that exhibits a lower exothermic starting temperature under the same set of curing condition is more reactive toward the epoxy resin. Since the reactivity of the hydroxyl group toward the oxirane ring is lower than that of the amine group, Ph Nov showed lower reactivity than DDS and DICY.
Dynamic Viscoelastic Analyses of DOPO Epoxy Resins with Various Curing Agents
Dynamic viscoelastic analysis can give information on the microstructure of cured epoxy resins. The tan d curves for the control network exhibit a major relaxation observed in most epoxy polymers.25 The transition corresponds to the major Tg of the cured epoxy resin, above which significant chain motion takes place. Figure 3 showed the storage modulus G9 and tan d of DOPO epoxy and Bis-A epoxy cured with Ph Nov. The results (shown in Table II) indicated that the DOPO epoxy resin cured with Ph Nov, DDS, and DICY had higher Tg (181, 254, and 198°C) than that of Bis-A epoxy resin cured with Ph Nov, DDS, and DICY (123, 212, and 138°C). The result may be attributed to the incorporation of a bulky rigid group that increases the rotational barrier.
结和DOPO 环氧树脂的讨论合成
包含磷的环氧树脂 ( DOPO 环氧树脂) 的合成由于 EPI( 系统 1) 被藉由反应执行 ODOPB 。 产品被 IR 表示的特色了。 DOPO 环氧树脂的 IR 光谱在图 1 中被显示。 尖峰以 917个 cm21 吸收在 1180 – 1120 cm21 指出 oxirane 环和尖峰指出 P- O- 酸碱值的键。 其他 DOPO 环氧树脂的吸收峰巅是 1248 cm21(-PAO) 和 1400 – 1500 cm21 。 (-P- 酸碱值 ) DOPO 环氧树脂的 EEW 被 HClO4/ 电位滴定法方法决定了并且发现是 229 。 ( 理论上的是 218)
泡治反应性
DOPO 环氧基树脂和各种不同的硬化剂的合剂泡治行为被数位相机学习了。 向被显示的 DOPO 环氧树脂区的各种不同硬化剂的比较反应性在 (图 2).因为环氧树脂用, 发热的出发体温 DICY ， DDS 的级增加 ,酸碱值十一月一展现在治疗的相同组下面的一个比较低的发热出发体温条件的硬化剂向环氧树脂是更反动的。 因为氢氧基的反应性聚集向 oxirane 环是比胺组低的, 酸碱值十一月表示了较低的反应性胜于 DDS 和 DICY 。
和各种不同的硬化剂的 DOPO 环氧树脂的动态兼具黏性和弹性分析
动态的兼具黏性和弹性的分析能提供关于治疗的环氧树脂的微细构造的资讯。 为控制网络的黄褐色的 d 曲线展现一个在大多数的环氧基树脂聚合物中被观察的主要弛缓。25 过渡符合被治疗的环氧树脂的主要 Tg,在上面重要的链运动发生哪一。图 3 给储存系数 G9 和鞣制革看环氧基树脂以酸碱值结果 ( 在表 2 中显示) 指出了 DOPO 环氧树脂以酸碱值十一月， DDS 和被二一超过那有较高的 Tg(181,254, 和 198个 ° C) 环氧树脂以酸碱值十一月， DDS 和 DICY(123,212, 和 138个 ° C) 治疗的 DICY 治疗的十一月治疗的 DOPO 环氧基树脂和二一的 d 。 结果可能被归因于庞大的硬组结合以增加旋转的障壁。