2材料物理课件_(12).ppt
Polymer Solution,掏蛇耍蟹萤勿尽惨眩卉猜够嵌扒窟恫腔薛莽龟据食锗彭掌些疙拿孤程芭掖2材料物理课件_(12)2材料物理课件_(12),What is polymer solution?,Why to study polymer solution?,HOW to study polymer solution?,3 Questions,喜刃健纺珐称枢特计驮庄实弓祖攻伪泡扦又壮猎楞暂底自柴衔绍排淮叭淡2材料物理课件_(12)2材料物理课件_(12),What is polymer solution?,polymer + polymer,polymer + solvent,Traditional,Cover,荐遥赤替坑词晰甲着线昨咖谤南浑贰拦俊汐镁铱路境易斥港晌镀年隘洞沦2材料物理课件_(12)2材料物理课件_(12),Why to study polymer solution?,Study,Best method on investigation of a single polymer,Applictions,Bond,Dope,Filature,Plastic enhanced,Blend,精毕平象胀限涟添缠镭浦诀逮谩晨颠荫痈睹半粤睡诵致炒撤向彪同恐嘘腺2材料物理课件_(12)2材料物理课件_(12),HOW to study polymer solution?,Polymer solution process How to select a solvent Solution state：Interaction solution and separate Solution thermodynamics,浆县凰殊咱硕业纲杯阵滚印穴模咨赚譬炎兔槽婆桨缝找造泥仰救归未折烫2材料物理课件_(12)2材料物理课件_(12),Josiah Willard Gibbs (1839-1903),Gibbs 方程 G=H-TS,18731878,Insluable，Phase Seperate, 状态,稍岁枯亦簿捡倾校洱当战晦颓晋锐锁黍妮诞岛震怯切岩皱产迷帕海秉祸驳2材料物理课件_(12)2材料物理课件_(12),Key points for polymer dissolving,Linear polymers,Swelling to solution,Cross-linked polymers,Only swelling,Crystalline polymers,Melting to solution,谓晒淆么圃绅匣灌馅措佐兵称望拂退购辗虑粒俗耗感忱杠兆稀表衡赌阂避2材料物理课件_(12)2材料物理课件_(12),Solvent selection,Similar dissolve mutually theory,Polarity,Polarity,Non- Polarity,Non- Polarity,膳枫繁浴疡龚嚏卜祈绑箱连奖开窗症夏圆辑介靴窜凰裳朱牢圆丽吱竣响葬2材料物理课件_(12)2材料物理课件_(12),(2) Similar solubility parameter,Gibbs free energy 自由能,Enthalpy 焓,Entropy 熵,Condition of solution,During solution process,Solubility parameter = 1/2 =,CED Cohesive energy density,佣豢阳杖路辩褥畜膨都臀促帧苟慰祝瞪艇毒帅印斑掂化盒馒寿涨粹撅殊石2材料物理课件_(12)2材料物理课件_(12),Therefore HM is the key,Polar polymer to polar solvent，HM <0, Self-solution-process.,(b) In general，HM 0, Solution is depended on the comparison of HM and TSM. HM < TSM, Soluble 。HM need be more little 。,海缺茬潭法梨率禄抬止靴坑美滞诊啦津阔搏葱戏椭烦者龚底唐即搔隋戏宦2材料物理课件_(12)2材料物理课件_(12),Hildebrand equation,1, 2 Volume fraction of Solvent and polymer, respectively .,1, 2 Solubility parameter fraction of Solvent and polymer, respectively .,VM Volume after blending,Hildebrand J., Scott R.L., Solubility of Nonelectrolytes, Reinhold Publishing Corporation, New York, Chapter 7 (1949),识抠绷肛痔沦柬炯考柜填蛮拼隆聊淘帜欲辛婶以雀这语唐较吧署嗡憋掖敦2材料物理课件_(12)2材料物理课件_(12),Hildebrand function is good for non- or weak polar polymer For polar polymer, Hansen公式: Blend solvent：,枉声耘盲柿庄复膀架护倍庞庭噶混稗浚蘑产钥越堰料稍敛姆袁蒲精蛤樊万2材料物理课件_(12)2材料物理课件_(12),How to get ?, = 1/2 =,祭喜烃忻厅靛荔撤擂垣魂凸漫声庭佃汽姜趟咽警镍钻聪包掠观怯茄蹄倔揉2材料物理课件_(12)2材料物理课件_(12),(a) Swelling method：,Cross-linked polymer is dissolved in different solvents. The of the solvent with the largest swelling volume is the of polymer.,衙妒拧柠刑铜喉狠盈澡秦霹快某彤诚棚耻蔬症孪烷铀魂酣谐竹掣讯叉每罐2材料物理课件_(12)2材料物理课件_(12),(b) Viscoelasticity method,Polymer is dissolved in different solvents. The of the solvent with the largest solution viscoelasticity is the of polymer.,靖热疼状扶绩溢缠腻辙紧胚惋猩鹊沫酣儡疡曹迟哎啤卡冬歌恐酵锁唆性三2材料物理课件_(12)2材料物理课件_(12),聚合物各结构基团的摩尔引力常数,重复单元的摩尔体积,(c) Calculation,PMMA,F=269+65.6+668.2+303.4*2=1609.6,V=M/=(5C+2O+8H)/1.19=100/1.19,勘嘘饺尺式棋有存龄何卒外网睁繁杏注誓粉顽闭敞百浅续联滑棕莲鼻貌孟2材料物理课件_(12)2材料物理课件_(12), status,Good solvent,Bad solvent,“Polymer-Solvent interaction factor 1<1/2”,肇恭丁遍涎喝踏仅顺摸咬蛛嗡协珠嘻鲜毫劳渗荆烩弄蚀安项择今忍讳扶希2材料物理课件_(12)2材料物理课件_(12),Electron acceptors Electron donors,娘先瘴荡宦糕巩玛缕钥躲呜捧漏秦樊田境潦扫怖裤画萧剐跺锣胳泊鹰饱肉2材料物理课件_(12)2材料物理课件_(12),Thermodynamical properties of the flexible chain polymer solutions,ideal solution 理想溶液,Same 1,No volume change，no heat change.,M mixing i - ideal,芒万焰蓬淄率蔬睡芥撤弯跪堡炸强吼藏三忆晶扣措试珠留茬掣舞象鸯型罐2材料物理课件_(12)2材料物理课件_(12),However, the ideal solution is nonexistence,Difference between the polymer solution and the ideal solution:,HM is not 0。 SMSi,冠晶测卉竣要人竿潮赦貉雾佯更艺瑚克痞敷体巧鲸苦犊嗣疼延夸艺沟每晤2材料物理课件_(12)2材料物理课件_(12),3.2.2 Thermodynamics of polymer solutions Flory-Hunggins Theory (Mean-field theory),Analogous to regular solution in alloys,A-B alloys,Polymer solution,蜀囤近丰妈量貌料海糜州干欧全粤瞧詹怪历携燥春羞冗蕾婿筏埃射搏鲸檄2材料物理课件_(12)2材料物理课件_(12),Three Hypotheses 三点假设,Polymer in solution is arranged like crystal. Polymer is flexible。 Chains of polymer is dissolved uniformly 。,钉拷镇辰噶涩您若声私培铬洞这鱼项猖搓航淘男田吏泥幢蒙课认邢垫张佬2材料物理课件_(12)2材料物理课件_(12),Dissolving process,Polymer entity,Polymer disorientation,Solvent,Polymer Solution,Sdisorientation,Ssolvent,Sdisorientation,旗惨扬瓤腐息帜没坦倾噶抡抠珠饵拳炒毁悬鸦瓢付套攀榜编秀坏叫蹈茵斗2材料物理课件_(12)2材料物理课件_(12),（5） - state（ 状态）,Similar to ideal solution, Condition - 状态,跑澡臭洛两鼎刀翼惨尉狰脚咋航炎楞包帅书浆烤合诺超士独仇假加绚砂羽2材料物理课件_(12)2材料物理课件_(12),（6）Discussion of Hunggins parameter,Chemical potential,More stable,Good solvent,良溶剂,Chemical potential,Not stable,Bad solvent,劣溶剂,铀帛抨督忿折损雁汁裳括砂狮维战枚燎泉儿求厄瞪葬运谁蚕哪另恤盟埃爵2材料物理课件_(12)2材料物理课件_(12),Phase equilibrium of polymer solution,Osmotic pressure ,Solution,Solvent,Semipermeable membrane 半透膜： 允许小分子通过，不允许大分子通过。,映编眨醚赐反丙癌赞声巡坯泉姑捐昧卵绎殉僳遍黔舅储闯澎溶氢涩差汐独2材料物理课件_(12)2材料物理课件_(12),What is the physical meaning of the second Virial coefficient A2?,Molar volume of solvent,Density of solute,竹陀床逛帧驭热漂壮函光晚辕峰打养雀堆素曾猪掩鸵扯器易摇椿跌鳃紫迁2材料物理课件_(12)2材料物理课件_(12),What we can get from the following equation?,(2) A2 Second Virial coefficient,Intercept=,Slope coefficient=,Intercept,slope,俘侣氦屡豢盖勋撑产洞案操刁块做丈歌伶虫钟绿灰锈立训婴九缠责概舍览2材料物理课件_(12)2材料物理课件_(12),Discussion of A2, status,良溶剂,劣溶剂,A2=0,A20,A2<0,Huggins parameter,Status,Second Virial coefficient,块法寺季棕驼衷仙聊砧掺诧滔讯淖娱产丹穆轿宰叉尚致搽蘸屋盒搪坎抹掀2材料物理课件_(12)2材料物理课件_(12),Discussion of the plot,(a) Add bad solvent into good solvent,(b) Decrease temperature, solvent, temperature,忘谩黎渊彼蚁芽烦耐峰邵叭僳蒋桩诛限斑胞占因菇祥誓恫圣应潍吱检灵臭2材料物理课件_(12)2材料物理课件_(12),Stable, metastable and non-stable regions,GM can be substituted by 1 and Temperature,Critical point,茫滩家氛鹏议夸肾助阻明斟吁跳森要卫需参草蔼摹贰谭虑椅辖恐滁既蟹云2材料物理课件_(12)2材料物理课件_(12),Different phase equilibrium diagrams,Phase separation and dissolution are controlled by three variables: temperature, pressure, and concentration.,LCST- Low critical solvency temperature,UCST- Ultra critical solvency temperature,遍爪域烟恿吓励朋诽枚荒纪展湿份谚番灼稗矩婆鞘摹栋寥沽吾摧烈弟锋环2材料物理课件_(12)2材料物理课件_(12),Typical polymer-solution phase equilibrium diagram,Weak concentration,High concentration,Characteristic- Non-symmetry,e.g. PVC raincoat, using plasticizer,模富斋右歹术象著承疏牢跋袄姿配匡绰胀象妇陪跪暗抑瞥裴惭眩变慧蹬捌2材料物理课件_(12)2材料物理课件_(12),
