合成树脂及塑料
閤成樹脂及塑料
합성수지급소료
CHINA SYNTHETIC RESIN AND PLASTICS
2014年
6期
31-34
,共4页
等规聚丙烯%相对分子质量%熔体流动速率%特性黏数
等規聚丙烯%相對分子質量%鎔體流動速率%特性黏數
등규취병희%상대분자질량%용체류동속솔%특성점수
isotactic polypropylene%relative molecular mass%melt flow rate%intrinsic viscosity
选取了6个相对分子质量不同的等规聚丙烯（iPP），研究了相对分子质量对iPP特性黏数和熔体流动速率的影响，并探讨了相对分子质量对iPP力学性能的影响规律。结果表明：iPP的特性黏数和熔体流动速率分别与重均分子量成0.78，-3.84次方关系，特性黏数与熔体流动速率成-0.200次方关系。随着iPP相对分子质量的减小，其弯曲强度、弯曲模量和拉伸强度先增大后减小，而断裂拉伸应变和悬臂梁缺口冲击强度单调递减。
選取瞭6箇相對分子質量不同的等規聚丙烯（iPP），研究瞭相對分子質量對iPP特性黏數和鎔體流動速率的影響，併探討瞭相對分子質量對iPP力學性能的影響規律。結果錶明：iPP的特性黏數和鎔體流動速率分彆與重均分子量成0.78，-3.84次方關繫，特性黏數與鎔體流動速率成-0.200次方關繫。隨著iPP相對分子質量的減小，其彎麯彊度、彎麯模量和拉伸彊度先增大後減小，而斷裂拉伸應變和懸臂樑缺口遲擊彊度單調遞減。
선취료6개상대분자질량불동적등규취병희（iPP），연구료상대분자질량대iPP특성점수화용체류동속솔적영향，병탐토료상대분자질량대iPP역학성능적영향규률。결과표명：iPP적특성점수화용체류동속솔분별여중균분자량성0.78，-3.84차방관계，특성점수여용체류동속솔성-0.200차방관계。수착iPP상대분자질량적감소，기만곡강도、만곡모량화랍신강도선증대후감소，이단렬랍신응변화현비량결구충격강도단조체감。
Six?isotactic?polypropylene?samples?studied?here?have?different?relative?molecular?mass.?The?influences?of?the?weight?average?molecular?mass?(Mw)?on?the?intrinsic?viscosity?([η])?and?the?melt?flow?rate?(MFR)?of?isotactic?polypropylene?were?researched.?The?effects?of?the?Mw?on?mechanical?properties?of?isotactic?polypropylene?were?explored.?The?results?show?that?the?power?law?behaviors?of?the?Mw,?[η]?and?MFR?of?isotactic?polypropylene,?that?is[η]∝Mw0.78,?MFR∝Mw-3.84,?[η]∝MFR -0.200,?are?obtained.?The?flexural?strength,?flexural?modulus?and?tensile?strength?of?isotactic?polypropylene?increase?first,?and?then?decrease?with?the?increase?in?the?Mw.?However,?the?tensile?strain?at?break?and?Izod?notched?impact?strength?of?isotactic?polypropylene?decrease?with?the?increase?of?the?Mw.
