Farnesene monomer,obtained through the bio-fermentation,offered a unique long side chain structure that served as an excellent platform for the synthesis of“bottlebrush-like”polymers with exceptional thermal propert...Farnesene monomer,obtained through the bio-fermentation,offered a unique long side chain structure that served as an excellent platform for the synthesis of“bottlebrush-like”polymers with exceptional thermal properties.Such polymers had immense potential in the production of polyurethane elastomers and adhesives.Hydroxyl-terminated polyfarnesene(PFD),which was safe,environmentally-friendly and pollution-free,was synthesized with farnesene as the monomer and industrial grade product hydrogen peroxide as the initiator by aqueous free-radical polymerization.展开更多
以丙烯酰胺、丙烯酸和2-丙烯酰胺-2-甲基丙磺酸(AMPS)三元共聚物(PSAM)为稠化剂,乳酸锆为交联剂开发出一种海水基耐高温压裂液,考察了PSAM的水解度、相对分子质量、AMPS含量、稠化剂和交联剂的浓度、配比等因素对冻胶形成及耐温耐剪切...以丙烯酰胺、丙烯酸和2-丙烯酰胺-2-甲基丙磺酸(AMPS)三元共聚物(PSAM)为稠化剂,乳酸锆为交联剂开发出一种海水基耐高温压裂液,考察了PSAM的水解度、相对分子质量、AMPS含量、稠化剂和交联剂的浓度、配比等因素对冻胶形成及耐温耐剪切性能的影响,通过测试不同条件下冻胶的储能模量(G')随时间的变化,研究了Ca^(2+)浓度和AMPS含量对交联动力学的影响。交联动力学的研究表明,随AMPS含量加大,PSAM交联速度降低,达到交联平衡所需时间延长,随Ca^(2+)浓度增高,交联反应速度越快,冻胶初始强度越高;耐温性能测试表明,当稠化剂中羧酸基含量与交联剂中锆离子含量之比n(—COOH)/n(Zr^(4+))≈1时,体系的耐温耐剪切性能最优,高含量AMPS提升压裂液的耐温耐剪切性能。在优化稠化剂结构条件下,稠化剂质量分数为0.6%、交联剂质量分数为0.3%配制的海水基压裂液,在150℃、170 s^(-1)下剪切120 min后,黏度保持在150 m Pa·s以上,耐温耐剪切性能优秀。展开更多
基金Supported by National Natural Science Foundation of China(52403096).
文摘Farnesene monomer,obtained through the bio-fermentation,offered a unique long side chain structure that served as an excellent platform for the synthesis of“bottlebrush-like”polymers with exceptional thermal properties.Such polymers had immense potential in the production of polyurethane elastomers and adhesives.Hydroxyl-terminated polyfarnesene(PFD),which was safe,environmentally-friendly and pollution-free,was synthesized with farnesene as the monomer and industrial grade product hydrogen peroxide as the initiator by aqueous free-radical polymerization.
文摘以丙烯酰胺、丙烯酸和2-丙烯酰胺-2-甲基丙磺酸(AMPS)三元共聚物(PSAM)为稠化剂,乳酸锆为交联剂开发出一种海水基耐高温压裂液,考察了PSAM的水解度、相对分子质量、AMPS含量、稠化剂和交联剂的浓度、配比等因素对冻胶形成及耐温耐剪切性能的影响,通过测试不同条件下冻胶的储能模量(G')随时间的变化,研究了Ca^(2+)浓度和AMPS含量对交联动力学的影响。交联动力学的研究表明,随AMPS含量加大,PSAM交联速度降低,达到交联平衡所需时间延长,随Ca^(2+)浓度增高,交联反应速度越快,冻胶初始强度越高;耐温性能测试表明,当稠化剂中羧酸基含量与交联剂中锆离子含量之比n(—COOH)/n(Zr^(4+))≈1时,体系的耐温耐剪切性能最优,高含量AMPS提升压裂液的耐温耐剪切性能。在优化稠化剂结构条件下,稠化剂质量分数为0.6%、交联剂质量分数为0.3%配制的海水基压裂液,在150℃、170 s^(-1)下剪切120 min后,黏度保持在150 m Pa·s以上,耐温耐剪切性能优秀。
