MAH接枝共聚物的制備及對(duì)PA1012的增韌.pdf

1、研 究 生 學(xué) 位 論 文 長(zhǎng)春工業(yè)大學(xué)研究生學(xué)位論文原創(chuàng)性聲明 長(zhǎng)春工業(yè)大學(xué)研究生學(xué)位論文原創(chuàng)性聲明 本人鄭重聲明：所呈交的研究生學(xué)位論文，《MAH 接枝聚合物的制備及對(duì) PA1012 的增韌》是本人在指導(dǎo)教師的指導(dǎo)下，獨(dú)立進(jìn)行研究工作所取得的成果。除文中已經(jīng)注明引用的內(nèi)容外，本論文不包含任何其他個(gè)人或集體已經(jīng)發(fā)表或撰寫過的作品成果。對(duì)本文的研究做出重要貢獻(xiàn)的個(gè)人和集體，均已在文中以明確方式標(biāo)明。本人完全意識(shí)到本聲明的法律

2、結(jié)果由本人承擔(dān)。 作者簽名： 年 月 日 長(zhǎng)春工業(yè)大學(xué)研究生學(xué)位論文版權(quán)使用授權(quán)書 長(zhǎng)春工業(yè)大學(xué)研究生學(xué)位論文版權(quán)使用授權(quán)書 本學(xué)位論文作者及指導(dǎo)教師完全了解“長(zhǎng)春工業(yè)大學(xué)研究生學(xué)位論文版權(quán)使用規(guī)定”，同意長(zhǎng)春工業(yè)大學(xué)保留并向國(guó)家有關(guān)部門或機(jī)構(gòu)送交學(xué)位論文的復(fù)印件和電子版，允許論文被查閱和借閱。本人授權(quán)長(zhǎng)春工業(yè)大學(xué)可以將本學(xué)位論文的全部或部分內(nèi)容編入有關(guān)數(shù)據(jù)庫進(jìn)行檢索，也可采用影印、縮印或掃描等復(fù)制

3、手段保存和匯編學(xué)位論文。保密的論文在解密后遵守此規(guī)定。 作 者 簽 名： 年 月 日 校內(nèi)指導(dǎo)教師簽名： 年 月 日 研 究 生 學(xué) 位 論 文 II Abstract PA1012, is widely used in automotive parts, medical equipment, military produc

4、ts and other fields, but its molecular structure with hydrophilic group-CO-NH-key, which greatly enhances the water absorption capacity of nylon, and poor mechanical properties that making its application range also seve

5、rely limited, so it is the most practical way to change the focus of the researchers. The purpose of this study is to get the core-shell structure of butyl acrylate grafted maleic anhydride (ACR-g-MAH) and styrene-maleic

6、 anhydride (SMA) to toughen PA1012 and further study its toughening effect and mechanism. The ACR-g-MAH copolymer was synthesized by emulsion polymerization, with PA1012 prepared blends, the FTIR characterization showed

7、a unique C=O stretching vibration peak at 1634 cm-1 and 1694 cm-1, successfully confirmed that MAH has been grafted onto ACR. When the ACR-g-MAH core-shell ratio was 80:20, the ratio of MAH in the shell was 3%, the amoun

8、t of ACR-g-MAH was 15 phr, the blends have maximum impact strength of 209.1 J/m, and the tensile strength changed little, so comprehensive mechanical properties better. DMA showed that the tanδ of the nuclear phase PBA i

9、ncreased and the storage modulus of ACR decreased after grafting MAH. TG test showed that proper grafting MAH was beneficial to improve the heat resistance of PA1012/ACR. SEM found that PA1012 etching surface was still s

10、mooth, while the surface of the blends caused by ACR-g-MAH off the hole, which indicated that ACR-g-MAH dispersed better in PA1012, the interface bonding effect and mechanical performance were enhanced to toughen PA1012.

11、 SMA and PA1012 were melt blended to prepare PA1012/SMA blends, when the SMA content was 5% of the blending system, the notched impact strength is 1463 J/m, which was 14.5 times of the pure PA1012 impact strength. SEM f

12、ound that PA1012 etching surface was still smooth, while the surface of the blends caused by SMA off the hole, which suggested that SMA dispersed better in PA1012. It can be found that by SEM when the content of SMA was

13、4% and 5%, the impact fracture surface show “l(fā)amellar“ and yield fibrils, which is ductile fracture characteristics, and obtain the toughening effect on PA1012. DSC characterization showed that when the cooling rate was

14、constant, after adding SMA, the temperature of the blend was higher than that of PA1012, and it was proved that SMA played the role of heterogeneous nucleating agent. Crystalline melting behavior and XRD show that PA1012

15、 has two crystal forms, α crystal form and β crystal form, after adding SMA, the α crystal form is obviously promoted and the β crystal growth is weakened. Key words: ACR-g-MAH Emulsion polymerization SMA PA1012 Tou