本文關(guān)鍵詞： 無(wú)規(guī)共聚聚丙烯 中介相 紅外光譜　出處：《高分子學(xué)報(bào)》2017年09期 　論文類(lèi)型：期刊論文

【摘要】：通過(guò)熔體淬冷方式制備了中介相態(tài)丙烯-乙烯無(wú)規(guī)共聚物(PPR),綜合使用原位紅外光譜、原位X-射線(xiàn)散射(WAXD/SAXS)、示差掃描量熱分析(DSC)和動(dòng)態(tài)機(jī)械熱分析(DMA)等方法系統(tǒng)研究了中介相態(tài)PPR在升溫過(guò)程中的微觀結(jié)構(gòu)演變.紅外光譜研究結(jié)果表明,在連續(xù)升溫過(guò)程中,中介相態(tài)PPR在30~50?C之間分子鏈構(gòu)象發(fā)生了變化,其可能源于剛性無(wú)定形區(qū)(RAF)中部分鏈段構(gòu)象的無(wú)序化轉(zhuǎn)變,并發(fā)現(xiàn)在RAF中存在長(zhǎng)度為n≤13(n為31螺旋序列中丙烯單元的個(gè)數(shù))的螺旋序列.中介相態(tài)PPR在連續(xù)升溫過(guò)程中經(jīng)歷了RAF中鏈段構(gòu)象的無(wú)序化轉(zhuǎn)變、中介相向α晶的轉(zhuǎn)變、不完善α晶的熔融和α晶的完善化,以及α晶熔融4個(gè)轉(zhuǎn)變過(guò)程.中介相向α晶的轉(zhuǎn)變是一個(gè)異相成核生長(zhǎng)過(guò)程,其結(jié)晶活化能ΔE=67.94 k J/mol.
[Abstract]:The intermediate phase propylene ethylene random copolymer (PPRP) was prepared by melt quenching. In situ infrared spectroscopy was used. In situ X-ray scattering WAXD / SAXS, differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMA) have been used to systematically study the microstructure evolution of intermediate phase PPR during the heating process. Intermediate phase PPR? The conformation of molecular chains between C and C may be due to the disordered conformation of some segments in the rigid amorphous region (RAF). It is also found that there exists a helical sequence in RAF with length n 鈮，

本文編號(hào)：1519459