Shanghai Daoqin Plastics Co., Ltd.

        近 year wet degree for polymer/macromolecule material effect/influence to especially 关注, its 背景之一 is in micro electronics and micro machine electrical field/area in wet degree factors for device parts can property effect/influence, 如引起材 material deformation, 引起开黏 cracking, 引起应 force in and other; 背景之二 is polymer/macromolecule material in engineering application in aging issues, aging reduce polymer/macromolecule material property can.

         wet degree for plastics effect/influence

         from wet degree factors 考虑, in versus for wet degree large 于 80% conditions lower, gas in water separation to material internal or in plastics surface formed water film, 因而会 make plastics use property can reduce; gas in versus for wet degree small 于 50%时, plastics in water separation 会蒸发 to gas in, 同样会改变 plastics property can, make has plastics 变脆, generate cracks.

         wet degree for plastics property can function main/primary is to absorption process. currently, about/regarding wet degree for plastics structure, force property can effect/influence research main/primary has 两方面, 一方面 research wet degree 引起 膨胀导致 材 material deformation and residual stress, use or value methods research wet degree 渗透, expand dispersion and water separation content non-uniform structure force and interface force;另一方面 research wet degree and temperature degree for plastics material features effect/influence, for strong/high degree, density, modulus, lifespan and other physical properties effect/influence.

         ring wet degree for plastics mechanical properties effect/influence is significantly. usually can absorption water separation plastics is property material, this material usually can formed types type 键, this type of has can can is hydrogen 键, nylon and other material is this type of material. from 另一 方面 说, water separation for polyethylene (PE) or PTFE 不起任何 function, this plastics property can for/regarding ring wet degree 改变几乎 is inert property.

         wet degree for nylon mechanical properties effect/influence

         nylon material is types tool has relatively good physical properties and mechanical properties has high semi thermoplastic property plastics, used for very more industrial in. meanwhile, has nylon tool has wet property (wet degree 敏感), this factors in material selection, plastics parts design, mechanical properties forecast and optimization and other step/link need heavy 视.

         has expert for nylon 66 吸 wet property can 进行 广泛 research, nylon 66 hardness and absorption water separation amount formed simple property 关系, 并以此确定 water separation for nylon lubricated function main/primary 取决于 nylon thin table/sheet 层 塑化.

        他提出 polymer 塑化发生于两 极端 conditions: strong/high degree decrease/reduce and polymer/macromolecule material other surface 时接触面积 increase. 他建议该区域面积 increase for lubricated function decrease low to large function.

         wet degree and temperature degree table/sheet 明, absorption water separation can increase pure resin and glass fiber reinforcement nylon 6/12 impact strong/high degree. for/regarding wet hot ring 且每次循 ring rear dry glass fiber reinforcement nylon sample, its impact strong/high degree has obvious 变化.

         hydrolysis function can obvious increase nylon tough property, versus water separation 缺失会导致 nylon material 变脆. has research hydrolysis expand large surface defects effect/influence fiber and interface, 他指出 surface defects expand large and fiber —基体 interface 退化导致 impact property can reduce. high temperature accelerated nylon hydrolysis function, already used for accelerated aging test research in. meanwhile, nylon wet rear, temperature degree is mono increase aging speed rate factors, temperature degree increase increase this speed rate.

         has other expert is nylon in amine hydrolysis for/regarding nylon combined formed is reaction. heavy 复 吸 wet and drying generate defect relatively low fiber ---基体结 combined advantages.