Abstract: A polytetrafluoroethylene porous fiber and a manufacturing and modifying process thereof including: blending a PTFE raw material, a processing aid, a modifying filler and the like with certain shear strength by using a blending device; extruding the blend through a die head, drawing, and feeding the blend into a spinning roller for stretching and spinning; feeding the stretched blend fiber into a solvent pool for washing and etching or high-temperature ablation; and drying, annealing and other treatments of the obtained PTFE porous fiber before collection. According to the process, continuous manufacturing of the PTFE fiber with the micro-nano porous structure is achieved, and in-situ modification is conducted on the fiber to avoid complex post-treatment steps. The process is flexible, the production is efficient and low-cost, and the product has adjustable fineness and length, lower density and good air permeability.

Abstract: Provided a material based on polytetrafluoroethylene and process for preparing the same. The process includes using polytetrafluoroethylene and processing aids as raw materials, melt blending the raw materials followed by forming, and optionally undergoing post-processing; wherein the post-processing is selected from at least one of microporization, heat treatment, and surface treatment. The process has good versatility, capable of preparing various polytetrafluoroethylene membrane materials with thermal shrinkage properties or polytetrafluoroethylene microporous membrane materials, and the materials prepared possess excellent strength and toughness, being flexible and soft. Moreover, the membrane can be functionally modified in situ during the processing, avoiding complex post-processing modification and processing.

Abstract: A small angle laser scatterometer with a temperature-pressure-controllable sample cell and a characterization method, the scatterometer formed by sequentially arranging a laser source, an adjustable attenuator, a beam expanding lens, a polarizer, the temperature-pressure-controllable sample cell, an analyzer, a transmission-type projection screen and an image acquisition device. The temperature-pressure-controllable sample cell is composed of a visual autoclave, a temperature control component, a rapid cooling component and a pressure control component. An evolution process of microstructures of polymer materials in specific atmosphere and rapid temperature and pressure changing environments on a scale of 0.5 ?m to 10 ?m.

Abstract: A microscopic observation system with a temperature-pressure-controllable sample cell and methods. The system can be configured to perform common optical microscopic observation and polarizing microscopic observation. The system is composed of a visual autoclave, a temperature control component, a rapid cooling component, a pressure control component and an optical imaging system, and can be configured to observe an evolution process of microstructures of polymer materials in specific atmosphere and rapid temperature and pressure changing environments in a scale of 1 ?m-1 cm. A novel characterization means for researching a condensed state evolution law of polymers in high-pressure environments, and also a new thought for deep reveal of the polymer crystallization mechanism and regulation of crystallization and phase separation behaviors of the polymer materials.

Abstract: A microscopic observation system with a temperature-pressure-controllable sample cell and methods. The system can be configured to perform common optical microscopic observation and polarizing microscopic observation. The system is composed of a visual autoclave, a temperature control component, a rapid cooling component, a pressure control component and an optical imaging system, and can be configured to observe an evolution process of microstructures of polymer materials in specific atmosphere and rapid temperature and pressure changing environments in a scale of 1 ?m-1 cm. A novel characterization means for researching a condensed state evolution law of polymers in high-pressure environments, and also a new thought for deep reveal of the polymer crystallization mechanism and regulation of crystallization and phase separation behaviors of the polymer materials.

Abstract: A small angle laser scatterometer with a temperature-pressure-controllable sample cell and a characterization method, the scatterometer formed by sequentially arranging a laser source, an adjustable attenuator, a beam expanding lens, a polarizer, the temperature-pressure-controllable sample cell, an analyzer, a transmission-type projection screen and an image acquisition device. The temperature-pressure-controllable sample cell is composed of a visual autoclave, a temperature control component, a rapid cooling component and a pressure control component. An evolution process of microstructures of polymer materials in specific atmosphere and rapid temperature and pressure changing environments on a scale of 0.5 ?m to 10 ?m.