A new kind of high performance composite resin matrix PEEK/PES, PEEKK/PES block copolymers have been prepared from the corresponding oligomers via a nucleophilic aromatic substitution reaction. The different propertie...A new kind of high performance composite resin matrix PEEK/PES, PEEKK/PES block copolymers have been prepared from the corresponding oligomers via a nucleophilic aromatic substitution reaction. The different properties of the copolymers are investigated by differential scanning calorimetry (d. s. c), thermogravimetric analysis (t. g. a) and dynamic mechanical analysis (d. m. a). The results show that the relationship between Tg and the compositions of the copolymers approximately follows the formula 1/Tg=W1/Tg1 +W2/Tg2 for PEEKK/PES block copolymers, and Tg=Tg1W1 +Tg2W2 for PEEK/PES block copolymers. The PES content and the segment length of the copolymers have a significant influence on their melting point. The thermal properties and dynamic mechanical behaviour of the copolymers are also studied. The introduction of PES segment into the molecular main chain increases the glass transition temperature of poly aryl ether ketones and decreases their melting temperature, that is to say it decreases their melting processing temperature. The block copolymers keep the high temperature stability and solvent resistance of poly aryl ether ketones. They are expected to be a new kind of high performance composite resin matrix.展开更多
For evaluation of the rheological and mechanical properties of highly filled wood plastic composites （WPCs）, polypropylene/polyethylene （PP/PE） blends were grafted with maleic anhydride （MAH） to enhance the inte...For evaluation of the rheological and mechanical properties of highly filled wood plastic composites （WPCs）, polypropylene/polyethylene （PP/PE） blends were grafted with maleic anhydride （MAH） to enhance the interfacial adhesion between wood fiber and matrix. WPCs were prepared from wood fiber up to 60 wt.% and modified PP/PE was blended by extrusion. The rheological properties were studied by using dynamic measurement. According to the strain sweep test, the linear viscoelastic region of composites in the melt was determined. The result showed that the storage modulus was independent of the strain at low strain region （〈0.1%）. The frequency sweep resuits indicated that all composites exhibited shear thinning behavior, and both the storage modulus and complex viscosity of MAH modified composites were decreased comparing to those unmodified. Flexural properties and impact strength of the prepared WPCs were measured according to the relevant standard specifications. The flexural and impact strength of the manufactured composites significantly increased and reached a maximum when MAH dosage was 1.0 wt%, whereas the flexural modulus after an initial decreased, also increased with MAH dosage. The increase in mechanical properties indicated that the presence of anhydride groups enhanced the interracial adhesion between wood fiber and PP/PE blends.展开更多
在全球化与智能化全面渗透的时代,高效准确的翻译服务成为链接不同语言文化的桥梁。AIGC + PE交互翻译模式在传统译后编辑的基础上翻开了新的篇章,成为当代主流的翻译模式。AIGC优异的数据处理与文本生成能力,为翻译过程注入了智能元素;...在全球化与智能化全面渗透的时代,高效准确的翻译服务成为链接不同语言文化的桥梁。AIGC + PE交互翻译模式在传统译后编辑的基础上翻开了新的篇章,成为当代主流的翻译模式。AIGC优异的数据处理与文本生成能力,为翻译过程注入了智能元素;而PE技术则通过人工译员的专业知识和语言创造能力将翻译质量提升到更自然、可信赖的水平。本研究明确了AIGC + PE交互翻译模式的重要性,分析了该模式的立论基础,即MTPE翻译模式的发展瓶颈和纯AIGC翻译存在的局限性,进而阐释该模式的理论基础,包括核心概念、特征分析以及工作机制解构,以期为翻译行业的智能化转型提供一定的理论依据。In the era of globalization and pervasive intelligence, efficient and accurate translation services have emerged as the vital bridge connecting diverse linguistic and cultural landscapes. The AIGC + PE Interactive Translation Mode has opened a new chapter under the basis of traditional post editing process, and has emerged as the mainstream approach to translation. The superior data processing and text generation capabilities of AIGC have infused intelligence into the translation process. Meanwhile, PE technology leverages the expertise and linguistic creativity of human translators to elevate translation quality to a more natural and trustworthy level. This study underscores the significance of the AIGC + PE Interactive Translation Mode, analyzing its theoretical foundation rooted in the developmental bottlenecks of MTPE (Machine Translation Post-Editing) mode and the limitations inherent in purely AIGC-based translation. Subsequently, it elaborates on the theoretical underpinnings of this mode, encompassing core concepts, feature analysis, and a deconstruction of its working mechanism. The aim of this paper is to provide a theoretical basis for the intelligent transformation of the translation industry.展开更多
文摘A new kind of high performance composite resin matrix PEEK/PES, PEEKK/PES block copolymers have been prepared from the corresponding oligomers via a nucleophilic aromatic substitution reaction. The different properties of the copolymers are investigated by differential scanning calorimetry (d. s. c), thermogravimetric analysis (t. g. a) and dynamic mechanical analysis (d. m. a). The results show that the relationship between Tg and the compositions of the copolymers approximately follows the formula 1/Tg=W1/Tg1 +W2/Tg2 for PEEKK/PES block copolymers, and Tg=Tg1W1 +Tg2W2 for PEEK/PES block copolymers. The PES content and the segment length of the copolymers have a significant influence on their melting point. The thermal properties and dynamic mechanical behaviour of the copolymers are also studied. The introduction of PES segment into the molecular main chain increases the glass transition temperature of poly aryl ether ketones and decreases their melting temperature, that is to say it decreases their melting processing temperature. The block copolymers keep the high temperature stability and solvent resistance of poly aryl ether ketones. They are expected to be a new kind of high performance composite resin matrix.
文摘For evaluation of the rheological and mechanical properties of highly filled wood plastic composites （WPCs）, polypropylene/polyethylene （PP/PE） blends were grafted with maleic anhydride （MAH） to enhance the interfacial adhesion between wood fiber and matrix. WPCs were prepared from wood fiber up to 60 wt.% and modified PP/PE was blended by extrusion. The rheological properties were studied by using dynamic measurement. According to the strain sweep test, the linear viscoelastic region of composites in the melt was determined. The result showed that the storage modulus was independent of the strain at low strain region （〈0.1%）. The frequency sweep resuits indicated that all composites exhibited shear thinning behavior, and both the storage modulus and complex viscosity of MAH modified composites were decreased comparing to those unmodified. Flexural properties and impact strength of the prepared WPCs were measured according to the relevant standard specifications. The flexural and impact strength of the manufactured composites significantly increased and reached a maximum when MAH dosage was 1.0 wt%, whereas the flexural modulus after an initial decreased, also increased with MAH dosage. The increase in mechanical properties indicated that the presence of anhydride groups enhanced the interracial adhesion between wood fiber and PP/PE blends.
文摘在全球化与智能化全面渗透的时代,高效准确的翻译服务成为链接不同语言文化的桥梁。AIGC + PE交互翻译模式在传统译后编辑的基础上翻开了新的篇章,成为当代主流的翻译模式。AIGC优异的数据处理与文本生成能力,为翻译过程注入了智能元素;而PE技术则通过人工译员的专业知识和语言创造能力将翻译质量提升到更自然、可信赖的水平。本研究明确了AIGC + PE交互翻译模式的重要性,分析了该模式的立论基础,即MTPE翻译模式的发展瓶颈和纯AIGC翻译存在的局限性,进而阐释该模式的理论基础,包括核心概念、特征分析以及工作机制解构,以期为翻译行业的智能化转型提供一定的理论依据。In the era of globalization and pervasive intelligence, efficient and accurate translation services have emerged as the vital bridge connecting diverse linguistic and cultural landscapes. The AIGC + PE Interactive Translation Mode has opened a new chapter under the basis of traditional post editing process, and has emerged as the mainstream approach to translation. The superior data processing and text generation capabilities of AIGC have infused intelligence into the translation process. Meanwhile, PE technology leverages the expertise and linguistic creativity of human translators to elevate translation quality to a more natural and trustworthy level. This study underscores the significance of the AIGC + PE Interactive Translation Mode, analyzing its theoretical foundation rooted in the developmental bottlenecks of MTPE (Machine Translation Post-Editing) mode and the limitations inherent in purely AIGC-based translation. Subsequently, it elaborates on the theoretical underpinnings of this mode, encompassing core concepts, feature analysis, and a deconstruction of its working mechanism. The aim of this paper is to provide a theoretical basis for the intelligent transformation of the translation industry.
